URAL Motorcycles 4320-10 Operation Manual

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URAL-4320-10,

URAL-4320-31

TRUCKS

AND THEIR MODIFICATIONS

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How to remove the thrust bearing from the pressure plate of ural 4320-10 truck.

Jim lungu

July 12, 2025

Removing the thrust bearing from the pressure plate.

Summary of Contents for URAL Motorcycles 4320-10

Page 1 URAL-4320-10, URAL-4320-31 TRUCKS AND THEIR MODIFICATIONS...
Page 2 URAL-4320-10, URAL-4320-31 TRUCKS AND THEIR VERSIONS Operation Manual 4320-3902035-10 РЭ (Ninth edition, revised & enlarged) © URALAZ. No part of the book or the whole book may be reprinted and copied without the prior written permission of the «URAL» Automobile Works»...
Page 3 This Manual is intended for drivers and motor transport workers who are in- volved in operation of URAL trucks. Specifications of the trucks, brief description of their components and assembly units with illustrations, operating requirements, a list of maintenance operations and reference data are given in the Manual. In connection with continuous work relating to improvement of the product, which increases their reliability and improves its operating conditions, particular alterations, which are not highlighted in this edition, can be introduced in the de-...
Page 4: Foreword
The basic models are URAL-4320-10 (Fig. 1) and URAL-4320-31 (Fig. 2) multi-purpose trucks devel- oped by means of updating URAL-4320 truck, where hyphens – 10 and 31 (30) indicate the model of the engine (i.e.
Page 5 - URAL-4420-10 and URAL-4420-31 bolster trucks intended for towing special semi-trailers on all kinds of roads and terrain; - URAL-44202-0311-31 bolster truck designed for towing semi-trailers on all kinds of roads; - URAL-44202-0612-30 bolster truck designed for pulling semi-trailers on airfields even sites;...
Page 6: Safety Requirements And Precautions
Item 1-3 – X1P – “URAL” Automobile Works” JSC, Miass, Chelyabinsk Region, Russia (manufacturer’s international identification code) Item 4-9 – Product denomination Item 10 – Year of manufacture Item 11-17 – Serial production number of vehicle Digits used for indicating the year of manufacture: 1 –...
Page 7 22. If it is required to dismantle the power unit on URAL-4320-10 trucks with a diaphragm clutch, screw an eye bolt into the rear end of the cylinder head.
Page 8: Precautions
23. When the truck operates with the autonomous heating unit running, it is prohibited: - to sleep in the cab with the autonomous heating unit running; - operation of the unit with the suction and exhaust branch pipes completely or partially cutoff; - refuelling the truck with heating unit running;...
Page 9 13. When moving the truck out of the track, do not travel with the steering wheel turned in the extreme position for a long time, because it can cause over- heating of the oil in the steering hydraulic system and the pump failure as a result. By the same reason, if the power is taken off the engine under steady-state condi- tions, release the load from the steering control shaft by turning the steering wheel until it turns freely.
Page 10 When the truck has been parked for a long time, close the wheel valves. At an ambient temperature lower that –35 °C open the wheel valves 15–20 km after be- ginning of travel. Upon opening the wheel valves blow through the tire pressure control system with the air from the tires (see the Section “Central Tire Pressure Control System”).
Page 11: Specifications
SPECIFICATIONS Parameter Ural-4320-10 Ural-4420-10 Ural-4320-0611-10 GENERAL Payload, kg 5000 Payload on chassis, kg 5875 Semitrailer weight falling on 5500 tractor fifth wheel, kg Truck Kerb Weight, kg 8795* 8161 Chassis Kerb Weight, kg 7605 Gross Vehicle/Road Train Weight (GVW), kg...
Page 12 0.55 depth of hard-bottom ford 0.7 * For the Ural-4320-10 truck equipped with a winch When operating on bad natural roads featuring some heavy sections; for the Ural-4320-10 truck also when operating on roadless terrain. For trucks having final drive ratio 7.32.
Page 13 Parameter Ural-4320- Ural-43202- Ural-4320- 0351-31 0611-30 GENERAL Payload, kg 6000 7000/5000* 7000 Payload on chassis, kg 6435* 7850/5850* Semitrailer weight falling on tractor fifth wheel, kg Truck Kerb Weight, kg 9170* 8690 8715 Chassis Kerb Weight, kg 8,320* 7,690 Gross Vehicle/Road Train Weight (GVW), kg 15 470* 15 990/13 990*...
Page 14 Ural-4420-31 Ural-44202- Ural-44202- Ural-4320- 0311-31 0612-30 0911-30 10 000 5500 8100/5500* 12 000 8340 8320 8085 9700 23 840/21 140* 27 720/21 120* 38 750 20 000 4525 4570 4425 4905 3815 3750 3660 4795 4940 5005 5300 5165 9200 11 715 15 600 14 835...
Page 15 at speed 60 km/h: single truck/chassis road train Cruising range, km, not less: at speed 40 km/h: single truck /chassis 1100 road train at speed 60 km/h: single truck/chassis road train Minimum turning radius on track axis of front (outer relative to turn 10.8 centre) wheel, m, not more Braking distance at 60 km/h,...
Page 16 10.8 13.0 36.7 38.5 33.8 35.0 0.55...
Page 17 Parameter Ural-4320-10 Ural-4320-31 Ural-4420-10 Ural-43202-0351-31 Ural-4320-0611-10 Ural-4420-31 Ural-44202-0311-31 Ural-44202-0612-30 Ural-4320-0611-31 Ural-4320-0911-30 ENGINE Type, model YAMZ-236M2 diesel, YAMZ-238M2 diesel, four-stroke, with four-stroke, with com- compression ignition, pression ignition, eight- six-cylinder, V-type cylinder, V-type Displacement, l 11.15 14.86 Rated power, gross, kW (hp)
Page 18 4420-10, Ural-4420-31, Ural-44202-0612-30 bolster trucks are provided with a reserve 60 l fuel tank (filling capacity 57.6 l) Ural-4320-10, Ural-4320-0611-10 trucks are completed with a 210 l main fuel tank (filling capacity 204 l). The truck can be alternatively equipped with the YAMZ-182 or YAMZ- 183 hydraulically driven diaphragm clutch of pulling-out type featuring an air- hydraulic booster.
Page 19 Parameter Ural-4320- Ural-4320-31 Ural-43202- Ural-4320- Ural-4320- 0351-31 0911-30 Ural-4320- 0611-31 Ural-44202- Ural- 0611-10 Ural-4420-31 0311-31 44202- Ural-4420- 0612-30 Wheels Divided type disc wheels with semi deep-well rim and toroidal bead seats, centered with chamfers of fastening holes 515-254 (254Г-508) 514-400 (400Г-508) Tires In accordance with truck’s deliv- 1200x500-508, 500/70-508...
Page 20 Parameters Ural-4320-10 Ural-4320-31 Ural-4420-10 Ural-43202-0351-31 Ural-4320-0611- Ural-4420-31 Ural-44202-0311-31 Ural-44202-0612-30 Ural-4320-0611-31 Ural-4320-0911-30 STEERING Drive type Mechanical, with hydraulic booster Steering gear Double-thread worm and side notched segment ratio 21.5 The truck can be alternatively equipped with steering type "screw - ball nut - rack-segment"...
Page 21 AБ-01* two-sectional, with marker and turn in- dicator lamps Number plate lamp Two items, ФП134Б, or ФП131AБ* ________________ Optional Not waterproof version Parameters Ural-4320-10 Ural-43202-0351-31 Ural-4320-31 Ural-4320-0611-10 Ural-4320-0911-30 Ural-4320-0611-31 СAB AND PLATFORM BODY Driver’s Cab Three-seater, metal-made, equipped with heater,...
Page 22 1000 1435 _________________ Optional. For the Ural-4320-0911-30 truck. Parameters Ural-4320-10 Ural-4320-31 Ural-43202-0311-31 Ural-43202-0612-30 Fifth wheel 50-11 type as per GOST 28247-89 with two degrees of freedom. Grips of king pin locking device are closed with semi-automatic lock.
Page 23 Ensuring tire air pressure control by means of the valve available in driver's cab. Optional. Optional. The truck can be completed with transfer box and power take- off enabling up to 100 % take-off of engine maximum output. Parameters Ural-4320-10 Ural-4320-0611-10 Ural-4420-10 Ural-4320-0611-31 Ural-4320-31 Ural-43202-0351-31...
Page 24 Fig. 5. Overall dimensions of the Ural-4320-31, Ural-4320-10 trucks Fig. 6. Overall dimensions of the Ural-43202-0351-31 truck Fig. 7. Overall dimensions of the Ural-4320-0911-30 truck...
Page 25 Fig. 8. Overall dimensions of the Ural-4420-31, Ural-4420-10 bolster trucks Fig. 9. Overall dimensions of the Ural-44202-0311-31 bolster truck...
Page 26: Controls And Instruments
CONTROLS AND INSTRUMENTS Controls and instruments located inside the cab are illustrated in Fig.10—13. Fig. 10. Instruction Plates Attached Inside the Truck Cab A – gearbox and transfer box plate lo- cated in cab on the right side of the front panel;...
Page 27 Fig.11. Controls and Instruments: 1–horn switch; 2–parking brake lever; 3–gearshift lever; 4–outer hatch handle; 5– power take-off engagement valve; 6–auxiliary power take-off engagement valve; 7– ortable lamp socket; 8–air filter clogging indicator; 9–radiator shutter control chain; 10–pressure control valve lever; 11–starter and instruments switch; 12–turn indicator switch;...
Page 28 Fig.12. Dashboard: 1 – two–pointer pressure gauge; 2 – oil pressure emergency drop lamp; 3 – coolant temperature indicator; 4 – oil pressure indicator; 5 – headlamp upper beam pilot lamp; 6 – speedometer; 7 – tachometer; 8 – current indicator; 9 – fuel reserve indicator; 10 – fuel level indicator;...
Page 29 When the starter and instrument switch is set in position III, the power is sup- plied to the electromagnet solenoid of the electropneumatic valve; the electromag- net pole core moves and actuates the system of valves in the pneumatic part and the air from the air distributing spider of the brake system is supplied to the engine stop pneumatic cylinder and in so doing it cuts off the fuel feeding to the engine cylinders.
Page 30 The necessity of maintaining the air filter cardboard filtering element should be determined by the readings of the air filter clogging indicator 8 (see Fig.11), which is located on the side lower distance bar of the cab front. If resistance in the oil filter rises (clogging of the filtering elements, solidifying of oil at lower temperatures), lamp 5 (see Fig.13) gives red light.
Page 31 Air take-off valve is mounted under the hood on the cab panel. For taking off the air, turn off valve plug 1 (Fig. 18), screw the capture nut of the hose available in the tools kit onto the valve body. Towing valve (Fig.
Page 32: Design, Operation, Adjustment And Servicing Of Truck Components (Brief Description)
DESIGN, OPERATION, ADJUSTMENT AND SERVICING OF TRUCK COMPONENTS (BRIEF DESCRIPTION) ENGINE The truck is powered with the engine manufactured by the Yaroslavl Motor Works. Description of engine design as well as instructions for engine operation maintainance given in the Operation Manual issued by the Yaroslavl Motor Works, which is supplied with the truck.
Page 33 Fig. 22. Fuel System Diagram: 1-main fuel tank; 2,6,14,15,17,19,23-return fuel lines; 3-fuel drain hose; 4-fuel drain cock; 5-reserve fuel tank; 7-manuel fuel feed pump; 8-low-pressure fuel pump; 9-injector; 10-injection pump; 11,12,21,24-low-pressure fuel pipes; 13-fine-mesh fuel filter; 16- starting preheater fuel tank; 18- high-pressure fuel pipes; 20-speed governor; 22-coarse- mesh fuel filter;...
Page 34 To stop the running engine knob 4 (Fig. 24) should be pulled out as far as it will go. When adjusting the engine stop control, shift knob 4 until it thrusts against the panel and ensure clearance “a” between engine stop lever 7 and rope clamp 6 within 2-3 mm.
Page 35: Engine Starting Preheating System
For maintaining the air filter unlock four catches and remove the cover, unscrew the nut fixing the filter element and take out the cardboard element Untie the tape and take off the precleaner. Take the plastic swirler out of the filter housing.
Page 36 - heat exchanger 12 (Fig. 25) located on the first cross-member of the truck frame; - pump unit 7 (electric motor, fan, fluid and fuel pumps), located on the right-hand side-member of the truck frame; - fuel tank 4 with cock 5; - high—voltage source;...
Page 37 The removable burner is bolted to the heat exchanger. Plug 7, solenoid valve 11 in asembly with the injector and electric fuel heater 10 are fitted on the burner. The solenoid valve cuts in and off the fuel to the burner. The injector fitted in the solenoid valve body sprays fuel needed for combustion.
Page 38: Gas Exhaust System
The fuel consumption should be adjusted by the fuel pump reduction valve (Fig. 26). To change the fuel volume supplied through the injector, screw out cap nut 7 on the fuel pump, unlock adjusting screw 6 and turn the latter to the right for increasing, and to the left for decreasing of the fuel feed.
Page 39: Cooling System
Fig.27. Gas Exhaust System: 1-inlet pipes; 2-auxiliary brake; 3-compensators; 4-silencer; 5-exhaust pipe Cooling System The engine cooling system is of liquid, closed type, with forced coolant circulation and is designed for operation with low-freezing coolants (Fig. 28). Fig. 28. Cooling System Diagram: 1-radiator;...
Page 40 In case of emergent coolant loss it is allowed to use water. Drain water and fill low-freezing coolant at the earliest opportunity. The coolant temperature in the cooling system should be within 75–100 The radiator is of corrugated–fin, four-row type. A tight plug provided with two valves is fitted on the upper tank filler of the radiator.
Page 41: Power Unit Mounting
When priming for the first time put into the filler 23 g of НИИСС-1 sealing powder, Specs. 38.10270-78. After disassembly of any of cooling system’s connections add the powder, if necessary. Water level in the cooling system should be inspected on cold engine. Fill water in the cooling system of cold engine through the radiator filler with the plugs of preheater’s filling pipe and and heater’s cook being open.
Page 42: Transmission
3. Measure the clearance between bracket 7 and cushion 4. A clearance exceeding 1 mm should be eliminated by using adjusting plates 9. 4. Fit bolts 10 and tighten nuts 8. Fig. 30. Power Unit Mounting: 1-center support cushion; 2-center support bracket; 3-front support beam; 4-front and rear support cushion;...
Page 43 - depress clutch pedal 16 so that the effort will increase considerably; - screw bolt 3 till the valve opens (air gets out of the control line of valve 1); - complete screwing in of adjusting bolt 3 through 0.5-1.0 of a turn and lock it with nut 2.
Page 44: Transfer Box
The transfer boxes of the Ural-43202-0351-31, Ural-4320-0911-30 trucks, the Ural-4420-10, Ural-4420-31, Ural-44202-0311-31, Ural-44202-0612-30 bolster trucks differ from the transfer box of the Ural-4320-10, Ural-4320-31 trucks in the speedometer drive gears. The transfer box, which a high-efficient auxiliary power take-off is mounted on, features an extended primary shaft and a housing modified in the area of fixing of auxiliary power take off.
Page 45 Fig. 32. Transfer Box: 1,22,36-flanges; 2,10,16,25,32,39-bearing caps; 3,18-tapered roller bearings; 4,38- high-speed gears; 5-bushing; 6-upper inspection hole cover; 7-gear engagement clutch; 8,20-low- speed gears; 9-transfer box housing; 11-primary shaft; 12,13- speedometer driving and driven gears; 14-speedometer flexible shaft; 15-breather; intermediate shaft; 19-spacing sleeve; 21-rear axle drive shaft; 23-oil scraper ring; 24,40- bearing nuts;...
Page 46 transfer box from the truck. Before adjusting set the box that upper inspection hole is positioned horizontally, then take cover. Check axial displacement of the shafts using a dial indicator. Table 1 Relationship between the parameters of speedometer drive gears and final drive ratio and tires size Final Size and model of...
Page 47 To adjust the intermediate shaft bearings proceed as follows: - remove the rear cap of the intermediate shaft bearings; - unlock and tighten the nut fastening the intermediate shaft bearing so that the spacing sleeve of the gears is clamped tightly; - lock the nut and remount the cover;...
Page 48: Cardan Drive
(Fig. 35) of needle bearings in the joints. Fig.34. Layout Diagram of Transmission Cardan Shafts and Winch Drive Shafts for the Ural-4320-10, Ural-4320-31 Trucks: 1-intermediate cardan shaft; 2-supporting plate; 3-centre support; 4,5,6-winch drive cardan shafts; 7,8,9- axle drive cardan shafts Fig.
Page 49 Cardan drive of trucks and special chassis-cabs featuring long wheel base differs from that of the Ural-4320-10 and Ural-4320-31 trucks by modified drive of the intermediate axle consisting of intermediate cardan shaft 2 (Fig. 37), center support 3 and and intermediate axle drive cardan shaft 4 of an extended length.
Page 50 Ural-4320-10, Ural-4320-31 trucks. When changing oil, check axial displacement of shaft 1. For this purpose: - disconnect the cardan shafts from flanges 6 of the centre support;...
Page 51: Driving Axles
Should the displacement exceed 0.8 mm, replace the bearings of the centre support. To adjust axial clearance “a” in case of replacement of centre support bearings 2, proceed as follows: - reassemble the centre support without fitting the pack of shims 3 (both sealing gaskets 4 should be fitted), screw home bolts 7 fastening cover 5, but do not tighten them;...
Page 52 Fig. 39. Final Drive: 1-driven bevel gear; 2,23-cylindrical roller bearings; 3-final drive case; 4-driving spur gear; 5-bearing body; 6-taper roller bearing; 7,8,12-shims; 9-bearing body cap; 10- rear axle drive flange; 11-collar; 13-bearing body of driving bevel gear; 14-driving bevel gear; 15-breather; 16-driving gear shaft;...
Page 53 Fig.40. Intermedaite (Rear) Driving Axle: 1-air supply collars; 2-wheel cylinder; 3-brake drum; 4-half-axle; 5-spring supporting bracket; 6-case cover; 7,9-gaskets; 8-final drive; 10-axle case; 11-drain plug; 12-inspection plug; 13-half-axle casing Fig.41. Drive to Steerable Wheels of Front Driving Axle: 1-air supply hose; 2-lock washer; 3-retaining ring; 4-lock nut; 5-wheel bearing nut; 6- journal;...
Page 54 Fig. 42. Constant Velocity Joint: 1-fork; 2-knuckle; 3-disc; 4-inner half-axle Should the need arise to dismantle the ball support out of the front axle case, then use the puller bolts available in the large tool bag. For this purpose fit them into threaded holes of the ball support flange and when screwing them in iniformly disengage the ball support’s tail from the half-axle casing.
Page 55 Fig.43. Checking Adjustment of Driving Bevel Gear Bearings When using the dynamometer for measuring the torque, coil the cord on the spur gear rim; the dynamometer readings should be as indicated in Table 3. Table 3 Final drive ratio Dynamometer readings, N (kgf) 16.5 - 27.6 (1.65 - 2.76) 7.32 17.6 - 29.3 (1.76 - 2.93)
Page 56 Table 4 Adjustment of Contact in Bevel Gear Meshing of Final Drive Allocation of contact pattern Methods of adjustment of correct Direction of shifting of on tooth of driven bevel gear meshing bevel gears Forward Reverse running running Correct contact Shift driven gear closer to the driving one.
Page 57: Running Gear
- jack up the axle on the side of the wheel to be adjusted; - remove the cap; - using a puller disengage the half-axle splines from the hub and take out the half-axle; - unscrew the outer nut and remove the lock washers; - turning the wheel by hand make sure that no friction is sensed between the brake drum and shoes;...
Page 58: Truck Suspension
Fig. 44. Towing Unit: 1-nut; 2-housing; 3-pressure ring; 4-elastic element 5-towing hook; 6-guide bushing; 7,9-grease nipples; 8-locking cotter pin; 10-retaining strip; 11-bolt Truck Suspension The front suspension (Fig. 45) consists of two longitudinal semielliptic springs, which operate in conjuction with two two-way hydraulic shock absorbers of telescopic type.
Page 59 following. With relative displacements of sprung and non-sprung parts of the truck, the fluid contained in the shock absorber flows over from one space to the other through small holes, so hindering the vertical movement of the rod and damping the truck vibrations.
Page 60 Fig. 46. Shock Absorber: 1-upper head; 2-body nut; 3-washer; 4-rod gland; 5- body bushing; 6-washer; 7- packing ring; 8-gland housing; 9-shock absorber body; 10-cylinder; piston rod; 12-thrust washer; 13,15,18-valve discs; piston; 16-piston nut; 17- valve body; 19-throttle compression disc; pressure plate;...
Page 61 Fig. 47. Intermediate and Rear Axle Suspension: 1-spring; 2-U-bolt; 3-spring pad; 4-U-bolt nut; 5-ball washer; 6-truck frame; 7,9- torque rods (upper and lower); 8-spring supporting bracket; 10-buffer bracket; 11-buffer pad; 12-buffer; 13-collar housing; 14-collar; 15-felt packing ring; 16-spacer ring; 17- walking beam axle bolt;...
Page 62 Tighten the U-bolt nuts in accordance with Fig. 48: - front springs: first with a torque of 200-250 N m (20-25 kgf m) and finally to 400-500 N m (40-50 kgf m); - rear springs: first with a torque of 250-300 N m (25-30 kgf m) and finally to 580-660 N m (58-66 kgf m).
Page 63 26, then back off by 1/6-1/4 a turn. The sealant squeezing-out into the gap between the end faces of the walking-beam nut and bushing is not allowed. Upon adjustment torque coupling bolt 18 to 44-56 N m (4.4-5.6 kgf m). Replace the damaged cap gasket having lubricated it on either side with УН-25 sealant (alternatively with Loktite-573).
Page 64: Wheels And Tires
Wheels and tires The wheels are separable, and consist of rim bases 2 (Fig. 49), bead rings 5, lock rings 4 and lock ring limiters 3. Fig. 49. Wheel and Tire Assembly: 1-wheel valve; 2-rim base with disk; 3- lock ring limiter; 4-lock ring; 5-bead ring;...
Page 65 Care of wheels and tires The longest service life of the wheels and tires and safety of their operation can only be reached, if the regular care of them is conducted, and operational requirements for truck tires, traffic regulations and safety regulations relating to vehicle transport are observed.
Page 66 - the tire casings, inner tubes and flaps should be clean and dry; - the tires, which have been stored at a temperature below zero, are recom- mended to be warmed up in a warm room to a temperature above zero; - direction of wheel rotation should coincide with that of the tread pattern (for tire casings having a directed pattern);...
Page 67 more than 6 mm, tire cuts, which bare its cord, etc.) from the hub without complete deflating of the tire; besides that, make sure that the tire has been completely de- flated before you start to dismantle the tire from the rim; - do not mount the cross-ply tires together with the radial ones on the ve- hicle;...
Page 68 Wheel disassembling 1. Place the wheel on an even, clean site with its lock part upwards, deflate the tire completely, for the controllable-pressure tires disconnect the valve from the wheel valve and recess it together with the seal into the hollow of the tire casing, remove the wheel valve.
Page 69 3. Remove the lock ring. For this purpose insert the flat end of the short tire iron into the dismantling slot of the lock ring and press its end out of the rim; then move the lock upwards, using the second iron, and completely release the lock from the rim by pressing it out of the rim and gradually moving along the wheel circle.
Page 70 - slightly recess the lower part of the seal inward the tire by a tire iron first and then insert the guide part of the seal with the valve in the rim slot. 4. To mount the second bead of the tire onto the rim stand onto the tire on the side opposite to the valve, recess this part of the tire casing bead into the mounting groove;...
Page 71 deflating the tire, disconnect the air supply hose not from the wheel, but from a source of compressed air. It is allowed to disconnect the hose from the wheel only after deflating the tire completely. If the rings have been reinstalled incorrectly, replace defective parts, make sure that the bead and lock rings are install ed properly (at a pr essure of 50 kPa (0.5 kgf/cm ), inflate the tire up to the pressure that ensures setting of the tire...
Page 72: Spare Wheel Holder
4. Inflate the tire to its nominal pressure. 5. Reset the balancing weights, if they have displaced regarding perimeter or got out across the bead ring radius. To remove the balancing weights insert a screwdriver between the spring and weight, press the spring out of the bead ring until releasing the weight, remove the weight and spring.
Page 73 Fig. 54. Upright Spare Wheel Holder: 1 – rope; 2 – reduction gear*; 3 – handle; 4 – base bar; 5 – bar gasket; 6 – holder base; 7 – U-bolt; 8 – tilting bracket; 9 – brace; 10 – clamp; 11 – bolt Fig.
Page 74: Steering
When lowering down the spare wheel, it is required to hang reduction gear 2 on platform side bracket 1, and fix rope 4 loop to catch 5 located on lever 6. For your safety pull on the reduction gear rope by turning detachable handle 3.
Page 75 Fig.57. Steering with Steering Gear of ““Screw - Ball Nut–Rack - Segment” Type: 1-steering gear; 2-pump; 3-oil tank; 4,5-low-pressure hoses; 6,11, 12-high-pressure hoses; 7-steering wheel; 8,10-steering cardan shafts; 9-centre support; 13-high- pressure pipe; 14-booster; 15-pitman rod; 16-pitman arm; 17-body; 18- bearings;...
Page 76 slide valve and its body, via drain pipe to the tank. In this case the booster cylinder chambers are under equal pressure, and the piston does not move. Fig.58. Steering Gear ( Worm - Side Segment Type): 1-steering gear case; 2-radial roller bearing; 3-worm; 4,34-plugs of filler and drain holes;...
Page 77 Fig. 59. Steering Gear (““Screw - Ball Nut–Rack - Segment” Type): 1-segment; 2-retaining ring; 3-protective ring; 4-collar; 5,13-packing rings; 6-balls; 7-screw; 8- nut-rack; 9-case; 10-fixing; 11,19,22-covers; 12-shims; 14-bearings; 15-guide; 16,20-pins; 17-distributor; 18-bearings; 21-insert; 23-bolt; 24-seal; 25- nut; a-from pump; b-drain; c,d-to power cylinder The distributor (Fig.
Page 78 Fig. 60. Distributor of Steering Booster: 1-steering gear case; 2-nut; 3,10-bearings; 4-packing rings; 5- slide valve body; 6- retaining valve; 7-ball; 8-distributor cover; 9-bushing; 11,20-shims; 12-collar; 13- retaining ring; 14-ring; 15-shaft; 16,23-pins; 17-torsion; 18-packing ring; 19-cover; 21-plungers; 22-slide valve; 24-screw; a-channel to supply working fluid from pump; b-channel to return working fluid from pump;...
Page 79: Steering Booster
When turning the steering wheel to the left bushing 9 and slide valve 22 are shifted axially to the right (from the steering gear). The fluid is forced from the pump via groove “e”, channel “c” into the booster rod chamber. The hydraulic booster being faulty retaining valve 6 provides for oil bypassing from one chamber of the booster to the other to ease truck steering.
Page 80: Steering Oil Tank
Fig. 62. Steering Booster Pump: 1-bolt; 2-collector; 3-packing ring; 4-gasket; 5- cover; 6-by-pass valve in assembly with safety valve; 7-distributor disc; 8-rotor; 9-blade; 10-stator; 11-needle bearing; 12-collar; 13-spacer; body; 15-pulley; 16-retaining ring; 17-belt; 18- screw; 19-bushing; 20-washer; 21-nut; 22-shaft; 23-Woodruff key; 24-ball bearing; a - to steering gear;...
Page 81: Maintenance Of Steering
Fig.63. Steering Oil Tank: 1-body; 2-filter; 3-filler filter; 4-filler plug with dipstick; 5,6-packing rings; 7- filter cover; 8-by-pass valve Fig.64. Steering Hinge: 1-ball pin; 2-rod end; 3-grease- nipple; 4-spring; 5-stopper; retaining ring; 7-seal; 8-spring holder; 9-lower insert; 10-upper insert; 11-strap; 12-protective cou- pling;...
Page 82 the rubber packing rings are in good repair. Prior to reassembling, wash parts of the pump, booster and control valve in kerosene or gasoline, dry them (without wiping over) and oil. When packing grease in the steering hinges, see that the protective cou- pling is not deformed noticeably under lubricant pressure.
Page 83 The meshing is made in such a way that axial clearance between the teeth of the worm and segment the latter being in its middle position is a minimum one and is increasing gradually when turning the segment either side. In a new steering gear axial travel of the segment in its extreme positions lies within 0.30-0.65 mm, while in its middle position, within 0.05-0.10 mm.
Page 84: Brake Systems
Adjustment of the front wheel toe-in. For checking the toe-in of the front wheels, see that the tires have been inflated to the rated pressure and measure difference in distance B and B (Fig. 65) across the wheel rims. Fig.65. Positions of Steerable Wheels For checking proceed as follows: - place the truck on an even hard-paved horizontal site, so that the front wheels are positioned for the straightforward travel of the truck;...
Page 85 Fig. 66. Service Brake Gear: 1 - wheel cylinder; 2 - brake shield; 3 - adjusting cam; 4 - wrench; 5 - brake shoe; 6 - friction lining; 7 - brake shoe anchor pin; I - clearance decrease; II - clearance increase The service brake gear should be adjusted as the linings wear by decreasing the clearance between the lining and drum with the help of adjusting cams 3.
Page 86: Combined (Pneumohydraulic) Drive Of Service Brakes
Combined (pneumohydraulic) drive of service brakes The two-circuit drive of the service brakes with the combined or two-line drive of the trailer. The drive gives a possibility to connect brake systems of pull-type motor transport means, which have single-line or double-line brake drives. The schematic diagram of the brake drive is shown in Fig.
Page 87 The air intended for engaging the electric signal senders and other consumers is taken off air bottles 3, 27 through triple safety valve 5. If it is required to check up the air pressure, check outlet valves 25, which it is possible to connect a portable pressure gauge to, are installed in each circuit.
Page 88 Air flows from the engine air filter to the compressor cylinders via reed-type inlet valves. The air compressed by the pistons is forced out to the pneumatic sys- tem via reed-type delivery valves located in the cylinder head. The block and head are cooled by the coolant supplied from the engine cool- ing system.
Page 89 Under the action of the spring relief valve 1 is closed. With the governor in such a state the pneumatic system is filled with compressed air from the compressor. When the pressure in hollow A equals 800 kPa (8.0 kgf/cm ), piston 7 overcomes the force of spring 5 and goes up, valve 4 gets closed, inlet valve 11 gets opened, and the compressed air from hollow A is delivered to hollow B.
Page 90 it from the seat in lower casing 15. The compressed air from V outlet arrives at Z outlet and further to the actuating mechanisms of the service brake second circuit. Fig. 70. Brake Valve: 1-lever; 2-thrust screw; 3- pro- tecting hood; 4 - roller; 5 - lever body;...
Page 91 occurs, when the brake is engaged, it indicates non-tightness of the outlet valve of one of the brake valve units. When the leakage occurs, replace the brake valve. The brake valve drive is mechanical. Brake pedal 17 (see Fig. 31), installed with the bracket in the cab, is connected via tie rod 10 with lever 6, that is mounted with bracket 5 on the cab floor panel.
Page 92 Under the air pressure the rod with the pistons moves and via the pusher acts on the piston 16 of the brake master cylinder, which forces out the fluid to the brake main. When the brake is released, the air from the air booster goes out through the brake valve to the atmosphere.
Page 93 pressed air in all the circuits in case of injuring or disrupting the tightness of the supplying main, and to feed the additional circuit from the two main ones. Fig. 73. Triple Safety Valve: 1 - body; 2 - cover; 3, 12, 15- valves;...
Page 94 If the additional circuit is out of order, the pressure in the two main circuits and in the body hollow drops until valve 15 of the additional circuit is closed. If a further delivery of the compressed air to the triple safety valve occurs, the pressure of opening the additional circuit valve will be kept in the main circuits.
Page 95 In so doing outlet valve 20 is closed, and inlet valve 21 is opened, and the compressed air flows from outlet I to outlet II and further to the trailer connecting main. When the pressure in outlet II reaches a certain value set with the help of adjusting screw 24, piston 4 overcomes the force of spring 23 and lowers down;...
Page 96 Fig. 75. Control Valve of Trailer Brakes with Double-Line Drive: 1, 8 – springs; 2 – relief valve; 3 – inlet valve; 4 – large piston; 5 – adjusting screw; 6 – equalizing spring; 7 – small piston; 9 – spring plate; 10 – medium piston; 11 – dia- phragm;...
Page 97 The action of the follower starts, when the forces, acting from the air pressing onto diaphragm 11 at the top and piston 10 at the bottom are balanced. Screw 5, which prechanges the force of spring 6, is turned in piston 7 to provide the ad- vanced trailer braking relating to the truck braking.
Page 98 To adjust the braking force regulator of the empty truck bring the air pressure in the pneumatic system to 0.6 MPa (6 kgf/cm ), (as per pressure gauge in the cab), when the brake pedal is pressed, and changing the length of upright tie rod 8 (see Fig.
Page 99 Fig. 78. Braking Force Regulator (BFR) Mounting: 1 – intermediate axle; 2 – braking force regulator; 3 - adjusting tie rod; 4 – rear axle; 5 – cross member No.5; 6 – BFR lever; 7 – elastic element; A – from brake valve Two-main valve (Fig.
Page 100 The parking brake control valve (Fig. 80) is intended for control over the trailer brakes, when braking the truck with the help of the parking brake and is mounted on cross-member № 3 of the chassis frame. It is connected with the tie rod of the parking brake lever via a spring-type extension piece.
Page 101 Coupling heads. The covers, which keep dust and mud away from the system, are available on the coupling heads. Coupling head 18 (see Fig. 67) is painted black. The cover of feeding head 17 is painted red, and that of control head 16 is yellow. To connect the trailer brake system properly the heads should be coupled in con- formity with their colour.
Page 102 The working order of the stop signal should be checked by pressing the brake pedal, if the air pressure is available in the pneumatic system. Operation of the brakes failure alarm should be checked as follows: - check if the pilot lamp (alarm) 3 (see Fig. 13) is in good working order; - slack off the nuts fastening the wire to BK503 brakes failure alarm switch;...
Page 103 accessories, with the check pressure gauge to coupling head 18, «A» type. Fill in the brake system with the compressed air until the pressure, when the compressor dis- engages, is reached. The air pressure on the check pressur e gauge should be 500-520 kPa (5.0-5.2 kgf/cm ).
Page 104: Emergency Brake System
Emergency brake system The functions of the emergency brake system are performed by one of the service brake system circuits. If one of the circuits is out of order, the emergency brake system ensures braking the truck efficiently enough. Parking brake system The parking brake system is intended to fix the truck on slopes.
Page 105 shifted in the direction of rotation and via the adjusting device presses r.h. shoe 2 to the supporting pin and drum. As the linings are being worn, travel of lever 1 (Fig. 84) increases and the brake efficiency can decrease. If lever 4 is mounted on the 12 th tooth of the seg- ment, it is required to adjust clearances between the linings and drum with the help of eccentric and sprocket.
Page 106: Auxiliary Brake System
brake engagement on the dashboard should turn on. To adjust the moment of its turning on, change the number of shims 7 under alarm switch 6. Auxuliary brake system The compression-type auxiliary brake is intended to reduce the truck travel- ling speed, when moving downhill for a long time.
Page 107: Electric Equipment
11.7904, a preheater motor capacitor, a tire pressure gauge with an illumination light are not installed. The electric circuit diagram for URAL-4320-10, URAL-4320-31 trucks both for defence and civil needs is shown in Fig. 86 (see the insert). Definitions to Fig. 86 are given in Table 5.
Page 108 Item, Fig.86 Description Type or item number Capacitor КБП-С Low-tone sound signal C306Д High-tone sound signal C307Д L.h. fog head lamp ФГ152A* L.h. connecting panel 17.3723 L.h. fog head lamp 401.3711 (671.3711)* L.h. turn indicator repeater УП101-Б1 (511-3726010)* L.h. front lamp ПФ133-АБ...
Page 109 Item, Fig.86 Description Type or item number Portable lamp socket ПС400 Flood head lamp 171.3711* Auxiliary brake relay 901.3747 Auxiliary brake switch 2802.3829 or ДЕ-T or MM125Д Fuse assy ПР120 Rear fog lamp switch 3842.3710-02.04 Heater motor resistor СЭ300 Heater motor МЭ226-В...
Page 110 Item, Fig.86 Description Type or item number - brakes failure – - air bottles pressure drop – - oil filter clogging – Parking brake alarm switch ВК403A or ВК403Б Parking brake relay PC493 Storage battery 6CT-190 (6CT-190A or 6CT-190TP or 6CT-190TM)* Storage battery switch 1402.3737...
Page 111: Alternator
ALTERNATOR The water-proof alternator (Fig. 87) is designed as a 12-pole synchronous electric machine having a built-in rectifying unit, type ВБГ-7Г or БПВ7-100 with input ventilation. The alternator has the following terminals: «+» - for connecting with the storage batteries and load; two terminals marked «Ш»...
Page 112 To avoid the alternator failure the following things are not allowed: - engine running with the switched off storage batteries; - disconnecting the wire conductors from the positive and negative terminals and unmaking the plug and socket joints of the alternator and voltage regulator with the engine running;...
Page 113 Fig.88. Circuit Diagram for Bench Test of Alternator Electric Parameters: 1 - alternator; 2 - current indicator; 3 - voltmeter; 4 - load; 5 - storage battery; 6 - ballast resistor Fig. 89. Circuit Diagram for Check of Rectifying Unit: a - checking of «plus»...
Page 114: Voltage Regulator
When mounting the alternator onto the engine, keep in mind that the rear bolt fastening the alternator to the bracket is fixed in a split-type support, and the foot of the alternator front cover is fixed without any clearance. Therefore, when mounting the alternator, before tightening its fastening bolts, slack off the bracing bolt of the split-type support, tighten the bolts fastening the alternator and only then tighten the bracing bolt of the alternator rear support.
Page 115: Storage Batteries
If it is required to check up controlled voltage: - connect a voltmeter, not less than 0.5 class of accuracy with the dial 0-30 V between the «+» terminal and the regulator body; - start the truck engine and set a medium engine speed; - switch on distant light of the headlamps as a load and read the adjustable voltage on the voltmeter.
Page 116 Storage battery fastening. Storage batteries 1 (Fig. 92) are installed in box 10 on two side supports and an intermediate support. Upon their installing into the box, the batteries are fastened by two upper clamps 13 and front stop 4. Upper clamps 13 are fixed by front and rear wedge stops 9 and 12.
Page 117 Install the batteries into the truck and fix them in the reverse order. Make sure that the upper clamps are inserted in guides 11. Otherwise, clamp 13 will not be in close contact with stops 9 and 12, and the battery will not be fas- tened, that can cause its breaking.
Page 118 Table 7 Preparation of 1 litre of Electrolyte Having Required Density Electrolyte density Water quantity, l Amount of sulphuric acid, for 25 C, g/cm 1.83 g/cm at 25 1.20 0.859 0.200 0.360 1.22 0.839 0.221 0.404 1.24 0.819 0.242 0.444 1.26 0.800 0.263...
Page 119 density checking, 20 min after their saturation, provided that the batteries have been stored not more than a year, and they are being made serviceable at the tempera- ture of the batteries and electrolyte to be poured +15 °C minimum. If it is required to put into operation the dry-charged batteries, which are stored at negative temperatures, down to -30 °C, urgently, fill them with the elec- trolyte, having a density of 1.26-1.28 g/cm...
Page 120: Lighting And Alarm System
Add water in winter right before starting the engine. If the electrolyte level reduces, when splashing out, add it. In so doing the density of the electrolyte to be added should conform to its density in the battery. If the electrolyte has fallen on the battery surface, remove it with a piece of clean cloth moistened in 10 % ammo- nia solution or that of soda ash.
Page 121 * 2 For civil-application vehicles A special switch should be turned ON to make all the turn indicators be flashing (truck emergency state); in so doing a pilot lamp in the handle is turned on. The other sound and light alarms are turned on by corresponding senders or switches.
Page 122 The adjuster shift handle, which should be set in “0” position with the fully equipped truck, is located on the control unit. For the URAL-4320-10 & URAL-4320-31 trucks, the URAL-4420-10 bolster trucks, the URAL-44202-0311-31 & URAL-0612-30 trucks the adjuster...
Page 123: Safety Fuses
of transported cargo up to 75 % of max. cargo weight. When travelling with the max. cargo weight, shift the handle to “I” position and it will provide enough lighting and prevent the possibility to blind drivers who travel the traffic counter flow.
Page 124: Cab, Hood And Fender Assembly And Truck Platform Body
CAB, HOOD AND FENDER ASSEMBLY AND TRUCK PLATFORM The truck cab is closed, three-seat, with fixed windshield and heat insulation, located behind the engine and equipped with rear-view mirrors on the left and right sides, a wide-angle mirror fixed on a special bracket on the r.h. fender and a side- view mirror on the r.h.
Page 125 locks the door. In this position the pawl is fixed by latch 13 and catch 14. Simultane- ously, upper guide prong 9 of the lock enters the slot in the striker and protects the door against sagging. Fig. 99. Door Lock: 1 –...
Page 126 If the door packing parts are damaged, adhere them using 88НП glue, upon scraping them with an abrasive cloth and wiping with clean cotton cloth moistened with gasoline. The door windows are equipped with lowering and swinging glasses. The door glasses are raised and lowered down with the help of lifting mechanisms.
Page 127 The flaps are controlled by lever 4. If the lever is set in its upper position, air is delivered via deflectors 13 to blow the glasses, in the lower position – to warm driv- er’s and passengers' feet. If the lever position is changed relative to the extreme posi- tions, the quantity of the air supplied to blow the glasses and warm the driver’s and passengers’...
Page 128 The cab is equipped with an independent heating unit (IHU) for additional heat- ing. The independent heating unit is located on the floor under the passenger’s seat in the cab. The IHU arrangement as well as its operational instructions are set forth in the IHU technical description attached hereto.
Page 129: Hood And Fender Assembly
90 degrees. Truck platform body The platform body of the URAL-4320-10, URAL-4320-31 and URAL-4320- 0911-30 trucks is equipped with a tailgate. The general view of the platform body and the platform-to-frame fastening elements are shown in Fig. 102.
Page 130 Fig. 103. Middle Seat Folding: 1 – rear middle seat; 2 – fastening belt; 3 – front middle seat; 4 – platform front grill; 5 – platform front side Fig. 104. Truck Platform Body with Canopy: 1 – canopy fastening rope; 2 – rope fastening rear panel of canopy; 3 – canopy bow;...
Page 131: Fifth Wheel
Fig. 105. Canopy Folding Method: I–VIII – folding steps When the truck is in service, regularly check bolt joints of the parts relating to the cab, hood and fender assembly, platform body and their fastening to the chassis frame. If cracks have been discovered in the parts, weld up and paint them. If it is necessary to perform welding, remove old paint-and-varnish coating from surfaces of the parts.
Page 132 Fig. 106. Fifth Wheel: 1 – handle; 2, 4, 9 – springs; 3, 12 – nuts; 5 – locking cam; 6 – latch; 7 – cover; 8, 11, 20 – bolts; 10 – front catch; 13, 14 – brackets; 15 – cushion; 16 – saddle; 17 – pin; 18 – rear catch;...
Page 133 To eliminate the clearances in the course of operation unscrew nuts 3, drive the road train for 100–200 m, braking it until the clearances disappear and after that tighten the nut until it gets in touch with handle 1 that should be in contact with the saddle.
Page 134: Special Equipment
- apply the parking brake of the bolster truck. Then make sure that the safety latch 19 has occupied the upright position and blocks the travel of the handle to you; - lift the supporting device of the semi-trailer in the top extreme position and fasten it securely;...
Page 135 Fig. 107. Power Take-Off with Pump: 1 – drive gear axle; 2 – housing; 3 – drive gear; 4 – housing cover; 5– output shaft gear; 6 – engagement chamber diaphragm; 7 – engagement chamber cover; 8 – cover; 9 – fork; 10 –...
Page 136: Auxiliary Power Take-Off
The control over the power take-off is remote, pneumatic and consists of the control valve, engagement mechanism and air lines. The control valve for remote engagement of the power take-off is mounted on the bracket located on the lower edge of the dashboard, to the right of the driver in the cab.
Page 137 speed grows, the suction valve of a differential type with a cylindrical spring is pro- vided. The oil is taken through the pipe connected with the oil sump of the transfer box, and is supplied from the pump to the gear bearings via channels in shaft 3 and in primary shaft of the transfer box.
Page 138: Winch
- set the gearshift lever of the transfer box in the neutral position; - disconnect the winch, for this purpose lower down the lever on the r.h. side member; - screw out plug 19 (see Fig. 110) in the pump body; - start the engine, engage the auxiliary power take-off and one of the gears in the gearbox;...
Page 139 Fig. 111. Winch Reduction Gear Unit: 1 – lubricator; 2 – thrust washer; 3 – sprocket; 4 – drum shaft bracket; 5 – lock washer; 6 – nut; 7 – sliding bearing; 8 – distance bush; 9 – drum; 10 – drum shaft; 11, 15 – bolts; 12 –...
Page 140 Fig. 112. Winch Control: 1 – band brake; 2, 8 – springs; 3 – nut; 4 – lock nut; 5 – binding coupling; 6 – winch control lever; 7 – bush; 9 – bracket; 10 – tie rod; 11 – winch en- gagement lever Upon readjusting the bearings, check with the help of paint, whether the worm pair is meshed properly, by the teeth contact pattern.
Page 141 Fig. 113. Winch Drive Front Cardan Shaft: 1 – cardan joint fork; 2 – safety pin; 3 – cardan shaft; 4 – needle bearing cap; 5 – locking strip; 6 – spider; 7 – slide fork; 8 – packing rings All cardan joints are of the same design and unified with those of GAZ-53A truck.
Page 142 Fig.114. Winch Rope Winding Guide: 1 – winch cross member; 2, 14 – chain tension r.h. and l.h. shims; 3, 12 – lead screw r.h. and l.h. brackets; 4, 11 – nuts; 5 – locking strip; 6 – lead screw; 7 – guide rolls; 8 – horizontal roller;...
Page 143 Increase the engine speed smoothly. Abrupt acceleration of the engine does not result in increasing the pulling force applied on the rope, but can cause a shearing off the safety pin. If the safety pin is sheared off, immediately disengage the clutch and set the gear shift lever in the neutral position;...
Page 144: Tire Pressure Control System
to be pulled out, and the winch rope hook – to a fixed object by means of the second towing rope. It is admissible to fasten the winch rope directly to the fixed object, in so doing the hook is fastened to preliminarily tightened rope. To avoid overheating of the winch reduction gear unit do not pull the cargo, using the whole length of the rope more than three times in succession at the max- imum load or the load close to it.
Page 145 Air is supplied to the tires via a single-line circuit. The tires of all the wheels are connected to each other, their pressure is the same and controlled simultaneously. The tire pressure of the front wheel and rear bogie in the URAL-4320-0911-30 trucks and the URAL-44202-0612-30 bolster trucks is different (see the Section “Specifications”).
Page 146 valve is used for cutting off the tire inflation system, if the pressure in the truck pneu- matic system drops lower than 600 kPa (6 kgf/cm ), is adjusted by bolt 13. The air-supply collars assembly 22 (see Fig. 116) comprises four collars fitted in the axle journal (casing).
Page 147: Sealing System
Fig. 118. Dismantling (I, II) and Installation (III) of Air-Supply Collars Assembly Parts: 1 – puller; 2 – collar; 3, 4 – hold- ers; 5 – slewing journal; 6 – dis- tance ring; 7 – mandrel Sealing system For reliable operation of the truck units and systems, which are exposed to water, when fording, and maintaining constant pressure in the inner hollows of the units, as well as in fuel tanks the sealing system is foreseen.
Page 148: Possible Troubles And Methods Of Trouble Shooting
POSSIBLE TROUBLES AND METHODS OF TROUBLE-SHOOTING Trouble Possible Reason Trouble-Shooting S t a r t i n g P r e h e a t e r Overheating of heat Ice plugs in the intake Warm the pipes echanger, water ejection branch pipes...
Page 149 Trouble Possible Reason Trouble-Shooting The heater smokes Low motor shaft speed Charge storage or ejects flame battery, check, if the motor is in good working order long engine Low fuel feed because Rinse the filters, heating-up, combustion of the nozzle filter clog- nozzle, eliminate the non- of the heater is unstable,...
Page 150 Trouble Possible Reason Trouble-Shooting S t e e r i n g Unstable truck Adjust backlash be- Wear "worm- movement, free travel tween the worm and seg- segment" pair the steering wheel exceeds Wear "rack- ment teeth and those of 25 degrees segment"...
Page 151 Trouble Possible Reason Trouble-Shooting B r a k e S y s t e m When pressing the Friction lining wear, Replace the friction brake pedal the truck fails large clearances between linings. Adjust clearances to be braked the service brake shoes and between the service brake brake...
Page 152 Trouble Possible Reason Trouble-Shooting storage battery Failure of all or sev- Bring the battery to a does not provide for suffi- eral battery cells repair shop cient engine speed storage batteries Wipe the battery with a Rapid battery self- terminals are closed by dry piece of cloth, and then discharge...
Page 153 Trouble Possible Reason Trouble-Shooting The PTO fails to disengage The return spring of the PTO Replace the spring engagement pneumatic chamber is broken The return springs of control Replace the springs valve are broken Seizing of the control valve Disassemble valve, eliminate the cause of sei- zure and lubricate the valve...
Page 154: Peculiar Features Of Operation
PECULIAR FEATURES OF OPERATION PREPARATION OF NEW TRUCK FOR OPERATION Before putting a new truck into operation, study this Operation Manual, carry out the daily maintenance, and additionally proceed as follows: 1. Install accessories available in the box with driver’s tool kit in the truck ac- cording to the Operation Manual.
Page 155 (the gearshift lever should be in the neutral position). Using the speed control knob, set minimum engine speed. The constant engine speed is set by pulling out knob 7 (see Fig. 23). The knob is connected with the control lever of the fuel-injection pump regulator via tie-rods and is located on the front panel in the cab.
Page 156: Running-In A New Truck
3. Open the fillers of the radiator and preheater heat exchanger. 4. Start the preheater in the sequence as described above and immediately fill 12 l of water in the heat exchanger through the filler, screw on the filler plug. The radiator filler should be left open.
Page 157: Driving Technique
DRIVING TECHNIQUE Proper driving of the truck is one of the most important conditions of extend- ing its service life and ensuring trouble free-operation, besides, it allows to achieve high average travelling speeds at minimum fuel consumption. The truck succeeds in crossing over heavy road sections, provided that all the truck mechanisms are controlled skillfully.
Page 158 When driving the truck with the reduced tire pressure, follow the readings of the tire pressure gauge. It is prohibited to drive the truck with the reduced tire pressure for the purpose to obtain smooth running. If the truck travels for a long time, the tire pressure may rise due to their heating.
Page 159 Tires 1200x500-508, 500/70-508 (1200x500-508), 500/70-20 (1200x500-508), ID-P284 Model Permissible Reduced Maximum Run Kind of Road Pressure, MPa Max. Speed, within Warranty (kgf/cm2) km/h Period of Tires, Heavy sections swampy terrain, snowed- 0.10 (1.0) up virgin land and loose 0.15 (1.5) 1000 sands All types of roads,...
Page 160 are signs of water penetration into the oil sump of the engine. If so, change the oil immediately. If the water has got into the oil sump, change the oil. Check availability of the water in the fuel-feed system by screwing out draining plug of the fuel tank and that of the fuel filter until the fuel starts pouring.
Page 161: Maintenance
The bolster truck centre of gravity is located higher than the centre of gravity of platform trucks with sides. Therefore, a special care should be taken in the course of movement. Break the articulated vehicle smoothly. Mind that the articulated vehicle moves properly under difficult road condi- tions when the tractor truck and the semi-trailer do not have a folding angle in a horizontal plane or such an angle is quite small.
Page 162: List Of Maintenance Jobs
LIST OF MAINTENANCE JOBS Description Technical requirements Instruments, tools, fixtures and materials needed Daily Maintenance (DM) Servicing Before Leaving Inspect truck and check for leaks of fuel, oil, brake fluid and cool- ant, also of air. Eliminate troubles, if need be. spect the engine, clean it from dust and...
Page 163 Description Technical requirements Instruments, tools, fixtures and materials needed - service brake sys- Check serviceability of Truck pressure gauge, pilot lamps 3 and 4 (see Fig. brakes failure pilot lamp on 13) by pressing button 6. The the dashboard pilot lamps should light up. Replace the bulbs in pilot lamps, if need be.
Page 164 Description Technical requirements Instruments, tools, fixtures and materials needed Drain the condensate When draining out of air bottles. In winter condensate pressure must be drain the condensate after available in air bottles each departure from a heated garage Maintenance in pre-service period after first 1000 km of run (50 hours of engine operation) Engine Maintain...
Page 165 Description Technical requirements Instruments, tools, fixtures and materials needed - front spring eyes; Fastening should Socket wrench 30x32, tight tire iron with tommy bar, pliers, driftpin, screwdriver, hammer - front spring U-bolts; Fastening should Wrench spring tight. When tightening up, U-bolt nuts, tire iron with the truck must...
Page 166 Description Technical requirements Instruments, tools, fixtures and materials needed - steering rods; Fastening should Wrench 24x27, tight wrench 24x27, pliers - steering booster Ditto wrench 24x27, socket wrench 36, pliers, screwdriver, hammer, tire iron with hydraulic jack tommy bar Tighten up the nuts Ditto Wrenches 17x19, 22x24, fastening the steering gear...
Page 167 Description Technical requirements Instruments, tools, fixtures and materials needed Special Equipment Check fastening Fastening should Wrench 14x17 the power take-off body to tight the gearbox housing Lubrication Change following units: transfer Fill oil up to the edge Wrench 17x19, vessel housing (see the Lubrica- inspection hole...
Page 168 Description Technical requirements Instruments, tools, fixtures and materials needed Inspect and, if need Ditto Wrenches 14x17, 17x19 be, tighten up all fasten- ings of air intake and ex- haust systems Check and, if need Permissible sagging Wrench 10x12 be, adjust the tension of the should lie within 7-13 mm steering pump drive belt when applying an effort of...
Page 169 Description Technical requirements Instruments, tools, fixtures and materials needed Check wire shoes Wire shoes should be Wrenches 14x17, 17x19 battery leads con- connected reliably nections for tightness and security Lubrication Lubricate in accord- ance with the Lubrication Chart: - front spring pins; Pack until fresh grease Grease lever-plunger...
Page 170 Description Technical requirements Instruments, tools, fixtures and materials needed Inspect and, if need Fastenings should Wrenches 14x17, 17x19, be, tighten up the fas- tight 19x22, box wrench 17x19 teners of cardan shaft flanges and fixing of the centre support to the beam Check clearances When rocking...
Page 171 Description Technical requirements Instruments, tools, fixtures and materials needed - brackets of upper Fastening should Socket wrench 24, tommy torque rods; tight clamp front Ditto Wrenches 17x19, spring rear brackets; 22x24, hammer chisel - front brackets of Ditto Wrench 22x24 front springs to lower flange of frame side-member;...
Page 172 Description Technical requirements Instruments, tools, fixtures and materials needed Electric Equipment Check fastening Fastenings should Wrenches 17x19, 22x24 the storage battery tight brackets to the truck frame Check charging de- If the storage battery is Wrenches 11x13, gree of storage batteries.
Page 173 Description Technical requirements Instruments, tools, fixtures and materials needed Lubricate in accord- ance with the Lubrication Chart: - upper bearings of Pack lubricant via lu- Lever-plunger gun, steering knuckle pins; bricator in volume specified wiping material in the Lubrication Chart splined joint Disassemble and lu-...
Page 174 Description Technical requirements Instruments, tools, fixtures and materials needed Check and tighten up, Fastenings should Wrenches 17x19, 22x24 if need be, fasteners of the tight towing unit to the cross- member Check walking Axial displacement Wrenches 10x12, 14x17, beam for axial displacement not allowable 17x19, driftpin, hammer and adjust, if need be (see...
Page 175 Description Technical requirements Instruments, tools, fixtures and materials needed Lubrication Lubricate the power unit in conformity with Operation Manual for the YAMZ-236M2, YAMZ- 238M2 engines Lubricate the ad- When turning Drop oiler justing lever shaft of park- parking brake adjusting lev- ing brake (see the Lubrica- shoes should...
Page 176 Description Technical requirements Instruments, tools, fixtures and materials needed Wash lubricate the parts; replace damaged and worn parts; hubs rear Fill oil up to the edge Wrench bleeding walking-beam suspension filler-and-inspection hydraulic brakes, wrench (see the Lubrication Chart); hole available in the cap. No 17x19, vessel for used oil, oil leakage through the cap model 133M...
Page 177 Description Technical requirements Instruments, tools, fixtures and materials needed Lubricate the thread Remove rubber of the parking brake ad- stopper in brake shield, then justing device (the see Lu- lubricate brication Chart) Every sixth M-2 additionally carry out the following works Transmission Adjust bearings...
Page 178 Description Technical requirements Instruments, tools, fixtures and materials needed Lubricate chain Lubricate chain Wiping material transmission of the winch along its full length rope winding guide Additionally once a year, in autumn Engine Prepare the starting Coolant fuel Wrenches 10x12, 11x13, preheater for winter opera- leakage is not allowed.
Page 179: Truck Lubrication
TRUCK LUBRICATION General Provisions The truck Lubrication Chart gives instructions about using of fuels and oils manufactured in Russia and of their foreign substitutes when operating the trucks under conditions temperate climate. Detailed recommendations and methods for lubrication of particular units and parts are described in corresponding Sections of this Operation Manual, which is supplied with each truck.
Page 181: Chart Of Lubricants And Working Fluids
CHART OF LUBRICANTS AND Item Designation of lu- Quan- Main grades, sea- Substitutes, season brication point tity of son application application Fig. points Engine fuel system Engine crankcase: YAMZ-236M2 See Operation Manual for the YAMZ en- gine YAMZ-238M2 Fuel injection advance coupling Parking brake Oil used for engine Oil used for engine...
Page 182 WORKING FLUIDS POL qty POL change interval Foreign grades (replenishment) Hints for lubrication (filling or charge) Filling Total per Main Substitute truck grade (l, kg)* (l, kg)* See Section "Specifications" See Operation Manual for the YAMZ engine 24.0 24.0 28.0 28.0 0.16 0.16...
Page 183 Cardan shaft Oil ТСп-15К Oil ТСп-10 (at intermediate support (at temperature temperature not below not below minus minus 45 At a temperature be- low minus 30 C it is Steering gear case allowed to dissolve oil ТСп-15К with 10- 15 % of diesel arctic or winter grade fuel Auxiliary power take-off...
Page 184 Shell Spirax 90 0.15 0.15 Check oil level and, if need be, add up to the Mobilube GX filler hole edge Every third M-2 Change oil BP Gear oil EP 1.48 1.48 After initial 1000 km Change oil. Fill oil SAE 90, up to the filler hole Esso...
Page 185 Winch reduction Oil ТСгип Oils used for the en- gear gine Steering control Oil "P" Spindle oil АУ, hydraulic system: Oil ВМГЗ Oil МГЕ-46В - with mechanism (at temperature (at temperature not “worm-side seg- below minus 30 below minus 18 ment”...
Page 186 Deusol Gear EP Check oil level and 140, add, if need be Mobilube Every fourth SM, or Change oil. Fill oil 140, once in two years inspection Gear oil GP 140, hole edge available Gear oil 140 EP, on reduction gear Spirax EP 140 case cover Shell Tellus 22,...
Page 187 Tire inflation Lubricant Лита Lubricant collars ЦИАТИМ-201 Air cylinders of auxiliary brake sys- tem and clutch control Air boosters of ser- vice brakes (rods, spacer collars, cyl- inders and piston collars) Bearings of com- pressor tensioner See Operation Manual for the YAMZ en- pulley gine...
Page 188 Mobilgrease 0.05 0.30 Every second M-2 Lubricate working BRB Zero surfaces of collars. Aeroshel Grease Pack grease in 6, Beacon 325 spaces between the first and second, and between the third and forth collars. Lubricate with a thin layer the working surface of half-axle 0.007...
Page 189 Wheel hubs Lubricant Lubricant Лита Литол-24 Splines of starter drive shaft See Operation Manual for the YAMZ en- Water pump bearing gine Front bearing of gearbox primary shaft "Ground" switch Lubricant Solidol oil Ж, solidol terminals and plugs Литол-24 oil С Clutch release sleeve See Operation Manual for theYAMZ engine...
Page 190 Retinax A, 0.85 5.10 Every second M-2 Change lubricant. Alvania R3, Lubricate working Alvania RA, surface collar Mobilux 3, pack grease Beacon 3, into space between Energrease L2 bearing and collar having first moved aged lubri- cant. Wash outer bearing. Lubricate bearing until complete filing...
Page 191 Joints of booster Lubricant Solidol oil Ж and cup and steering rods Литол-24 grease Ж, Solidol oil C and cup grease C Torque rod joints Joints of fuel feed control Towing unit bushes Knuckle pin upper bearings Splined connections of cardan shafts: - intermediate axle and intermediate shaft drive...
Page 192 Retinax A, 0.037 0.22 Every second M-2 Lubricate through Alvania R3, grease cup. Alvania RA, Pump lubricant Mobilux 3, before beginning of Beacon 3, deformation of Energrease L2 protective coupling of end pieces 0.06 0.72 Lubricate trough grease cups until fresh lubricant ap- pears from gap be- tween head and...
Page 193 - rear and front Lubricant Литол- Solidol oil Ж and cup axles drive grease Ж, Solidol oil C and cup grease C steering control - winch drive Spare weel lift re- duction gear Plain bearing of winch drum shaft Rope winding guide bearings Friction surfaces Solidol oil Ж, solidol...
Page 194 Retinax A, 0.180 0.36 Every second M-2 Change lubricant Alvania R3, Alvania RA, Mobilux 3, Beacon 3, Energrease L2 0.010 0.010 Disassemble and lubricate 0.02 0.04 (once a year) Lubricate through grease cups until fresh grease oozes 0.05 0.05 Lubricate course disas- sembly...
Page 195 Working surfaces of Graphite grease Solidol oil Ж, solidol winch winding guide УСсА oil C or lubricant lead screw Литол-24 Roller bushes and holder body cavities of winch rope- guide rollers Chain transmission of winch rope winding guide Center bracket shaft of brake valve con- trol and clutch control...
Page 196 Shell Barbatia 2, 0.30 0.30 Lubricate after each Mobilgrease winch operation. Graphited No. 3, If winch was not Castrol Spheerol used, lubricate once a year in the course of SM 0.033 Lubricate when disassembling Lubricate when disassembling 0.03 0.03 Every third M-2 Lubricate trough grease cups until fresh grease oozes...
Page 197 Clutch and brake Graphite grease Solidol oil Ж, solidol pedal shaft УСсА oil C or lubricant Литол-24 Service brake shoe pins Parking brake con- trol two-arm lever pin on transfer box Rod pins, brake shoes supports and lever joints of parking brake Pin of parking brake control lever in cab...
Page 198 Shell Barbatia 2, 0.015 0.015 Lubricate when Mobilgrease disassembling Graphited No.3, bushes and shafts Castrol Spheerol 0.005 0.060 Every second M-2 Lubricate shoe bushes and pins 0.005 0.005 Lubricate when disassembling, having first cleaned them 0.005 0.020 0.0075 0.015 Lubricate when disassembling bushes and pins 0.0075...
Page 199 Spring leaves Graphite grease Solidol oil Ж, solidol УСсА oil C or lubricant Литол-24 U-bolts thread of front and rear springs Terminals of: Lubricant Lubricant Литол-24 - service brake ВНИИ НП-510 failure sender (at manufacturing factory only) - indicator pickup of minimum oper- ating pressure in pneumatic system...
Page 200 Shell Barbatia 2, 0.325 1.300 Lubricate after dis- Mobilgrease assembly concave Graphited No.3, surface of spring Castrol Spheerol leaves, having first removed the rust 0.004 0.064 Lubricate during disassembly having first removed rust and mud Retinax A, 0.008 SM (once Lubricate with a Alvania R3, a year)
Page 201 Section "Maintenance". Applicable to the Ural-4320-10, Ural-4320-31, Ural-4420-10, Ural- 4420-31 trucks. Applicable to the Ural-4420-10, Ural-4420-31, Ural-44202-0311-31, Ural-44202-0612-30 trucks.
Page 202 0,05 0,30 Every second M-2 Wash working surfaces of wheel and master cylin- ders parts with brake fluid 0,02 0,12 Lubricate working surfaces of parts when reassembling 0,850 1,700 Change fluid after disassembly, washed shock ab- sorber parts in kerosene and dried them up 31,0 31,0...
Page 203: Storage
STORAGE General instructions A new truck, if it is not to be put into operation, can be stored without preservation, within three months from the date of its dispatch from the Manufac- turer. In this case, upon the truck has been put into storage, apply a thin layer of Литол-24 lubricant or solid oil onto unpainted surfaces of the front axle ball sup- ports, provide maintenance of the storage batteries and tires as per instructions...
Page 204 - crank the engine crankshaft without feeding the fuel by two or three short- time engagements of the starter; - remove the cylinder head covers and screw out by two revolutions the bolts fastening the pipes to nozzles of the third and fourth cylinders of YAMZ-236M2 engine and to those of the fourth and fifth cylinders of YAMZ-238M2 engines;...
Page 205 Table 13 Preservative and Protective Materials Designation of Material Denomination and Composition Engine preservation /8ГР working-and-preservation з к /10В oil mixture or M-8Г2 or M-10Г2 oil mixture as з к per GOST 8581-78 Standard with 10 % AKOР-1 addi- tive (by volume) as per GOST 15171-78 Standard Fuel preservative mixture Mixture of diesel fuel as per GOST 305-82 Standard with 2 % of AKOР-1 additive (by volume)
Page 206 - to unload the rear suspension put the unloading supports, 770 mm high, under the cylinder part of rear suspension axle 21 bracket; - to unload the front suspension put the unloading supports, 220 mm high, between the leaf springs and the chassis frame side members. In-storage maintenance of trucks Check the tire pressure, condition of the protective coatings, check the truck for fuel and oil leaks and those of the special fluids every month.
Page 207: Transportation
Taking trucks out of storage Before resuming the truck operation after its storage: - check the tire pressure and bring it to the norm; - remove the truck from its supports and release its springs; - unseal the fuel feed, gas exhaust and engine ventilation systems and the oil tank;...
Page 208 brackets of the front axle leaf springs with the help of two bracing cables. Thrust bars should be fastened under the intermediate axle wheels at the front and under the rear axle wheels at the rear. The front wheels of the truck should be fixed by lateral thrust bars on the outer side of the wheels.
Page 209 In each particular case the transportation conditions should be agreed upon with the railway station of departure. To make the truck suit to the railway overall sizes 02-BM, GOST 9238-83 Standard, remove the canopy and arches from the truck platform body. When transporting the trucks by air, preparatory work should be done and truck cushioning should be additionally disengaged by special devices manufac- tured and supplied by a consignor.
Page 210: Salvaging
SALVAGING Upon expiry of its service life, the truck is subject to salvaging. For this pur- pose follow this procedure: wash and dry the truck; remove the storage batteries and check whether they are further servicea- ble. If not, pour off the electrolyte into special glassware and bring the storage batteries to a collecting station;...
Page 211: Appendices
APPENDICES APPENDIX 1 TORQUES APPLIED FOR TIGHTENING OF MAIN THREADED CONNECTIONS, N.m (kgf.m) Engine Nuts fastening: exhaust silencer 24-36 (2.4-3.6) silencer inlet pipes to exhaust manifolds 28-36 (2.8-3.6) Lock nuts fastening silencer inlet pipes to exhaust manifolds 33-41 (3.3-4.1) Transfer Box Nuts fastening bearings of primary, intermediate shafts and differential rear holder 200 (20), minimum...
Page 212 final drive flanges 250 (25) differential pinion cages 120-140 (12-14) intermediate and rear axles brake support 160-200 (16-20) Nuts and lock nuts of driving bevel gear bearings 450-500 (45-50) Nuts of wheel hub bearings 200-250 (20-25) back off nuts 1/8-1/6 a turn, maximum Lock nuts of wheel hub bearings 400-500 (40-50)
Page 213: Data For Checking And Adjustment
Steering wheel nut 80-100 (8.0-10) Brake System Nuts of compressor head studs 12-16 (1.2-1.6) Bolts of parking brake support 80-100 (8.0-10) Electrical equipment Generator 60-80 (6.0-8.0) pulley nut Brake signal switch ВК-12Б 24.5 (2.45) maximum Secondary brake release 2802.3829 30.0 (3.0) maximum Vessel air pressure drop sensor 2702.3829 30.0 (3.0) maximum Coolant temperature sensor ТМ100А...
Page 214: Data On Weight Of Main Components
Power take-off with flange 15.9 Auxiliary power take-off 15.3 Winch with reduction gear Winch rope with hook Platform body Platform body canopy 33.5 Hood and fenders 120.38 1020 kg for the Ural-4320-10, Ural-4320-31, Ural-43202-0351-31 trucks; 1170 kg for the Ural-4320-0911-30 trucks...
Page 215: Wire Colouring
APPENDIX 4 WIRE COLOURING Wire colour Wire designation in Fig. 86 White 46,46a Blue 30д, 30ж, 30л, 42б, 45, 45a, 45б, 49, 49a, 51, 55e, 55ж, 55к, 55м, 55н, 55ч, 57a, 57б, 57д, 83, 122 Yellow 15г, 15д, 30a, 39, 39a, 39б, 40, 41в, 53, 53a, 53г, 53д, 61á, 61в, 61к, 62б, 70, 84a, 85, 85a, 85б...
Page 216 Designation Bearing type Overall Location Quantity dimensions*, per truck 7310A Ditto 50x110x29,5 Final drive driving spur gear 12311K1M Radial roller bearing 55x120x29 Final drive driving with short cylindrical gear shaft (rear rollers support) 6-7515A Single-row tapered 75x130x33,5 Differential, final drive roller bearing driving gear shaft (front support)
Page 217: Specification Of Truck Bulbs
Designation Bearing type Overall Location Quantity dimensions*, per truck 6-1180304K2C9 Ditto 20x52x18 Generator (front support) 804704K3C10 Roller needle bearing 22x35x26,5 Spiders cardan shafts of winch drive 180508K2C17 Single-row radial ball 40x80x23 Intermediate cardan bearing shaft of winch drive (supporting bearings) 46310AK Single-row radial - 50x110x27...
Page 218: Waste Oil Collection Rate
Manufacturer. When running the truck the location of the tools and accessories, namely towing rope 8 (Fig. 126), can be determined by the driver himself. Location of tools and accessories in the Ural-4320-10, the Ural-4320-31 trucks Position in Description Quantity Fig.
Page 219 Fig.124. Tools of the Ural-4320-10, Ural-4320-31 trucks Position in Description Quantity Fig. Screwdriver A-250x1.4 Ring wrench 24x27 Union pipe Socket wrench 27x38 for wheels Socket wrench 30x32 for spring U-bolt nuts Socket wrench 36 Puller-bolt for ball support Engine ring bolt...
Page 220 Position in Description Quantity Fig. Ditto Feeler gauge Combination screwdriver Pliers Wrench 32x36* Ring wrench 22x24* Ring wrench 17x19 Wrench 19x22 Wrench 27x30 Injector remover In tool box under platform bed (Fig. 125) Half-axle puller Socket wrench 140 Hydraulic jack Lever-plunger pressure gun 10 ltr jerry can ______________________________...
Page 221 Cross-cut saw One per 10 trucks. Fig.126. Location of Tools and Accessories on the Ural-4320-10, Ural-4320-31 Trucks: 1-ПНВ case fastening belt; 2-portable lamp; 3-plug; 4-first-aid kit case; 5-tool box; 6-tire irons; 7-entrenching spade; 8-towing rope; 9-20 l jerry can; 10-cross-cut saw...
Page 222 (applicable to the Ural-4420-10, Ural-4420-31 tractors). On the Ural-4320-10, Ural-4320-31 trucks the handle of spare wheel lift reductor is kept in the tool box. On the Ural-43202-0351-31 truck the reductor handle and spare wheel lift reductor itself are kept in the tool box.
Page 223 When using the jack place pads under the truck wheels. Be sure to apply the parking brake and to engage the lower gear in the gearbox. For lifting the front axle, set the jack screw head in the recess on the clip fastening the spring;...
Page 224: Supplementary Information On Truck Design
APPENDIX 9 SUPPLEMENTARY INFORMATION ON TRUCK DESIGN The assembly units and systems different from those described in this Manual can be installed in the truck. Peculiarities of their design and maintenance are given below. CLUTCH RELEASE CONTROL When mounting the power unit with a diaphragm clutch, the clutch control design will be modified and will be of two types: mechanical clutch release control with an air booster (Fig.
Page 225 When acting onto clutch pedal 17, the effort is transferred to air valve 8 rod via lever 12 and the parts of tie rod 9 opening its valve. The air pressure from the truck pneumatic system is transferred to cylinder 22 through hose 18;...
Page 226 Fig. 130. Clutch Release Control: 1-expansion tank; 2-tank cover; 3-bolt; 4-nut; 5,14,23-brackets; 6-cylinder thrust; 7-master cylinder; 8-pedal mechanism; 9,32-springs; 10-brake pedal; 11-clutch pedal thrust; 12,15- brake pedal rods; 13-brake valve control lever; 16,24,33-hoses; 17,19,31- clutch control pipes; 18-control outlet valve; 20,22-air bottles; 21-single protection valve;...
Page 227 Fig. 131. Master Cylinder: 1- plug; 2,7-rubber rings; 3-return spring; 4-loading spring cup; 5-loading spring; 6- inlet union; 8-cylinder body; 9-piston; 10-collar; 11-retaining ring; 12-protective jacket; 13-pusher; 14-ring; 15-packing ring; b = 0.2-0.6 mm Fig. 132. Clutch Air-Hydraulic Booster: 1-body; 2-bleeding valve; 3-packing rings; 4- rod;...
Page 228 On the piston side the body is closed with cover 6, which the rod goes through. Fork 8 secured to the rod end is fixing the clutch air-hydraulic booster to the clutch release fork lever. In the centre of cover 6 is fitted rubber scraper 7, which clears the rod from dirt and prevents entering of dirt into the body.
Page 229 - take off the protective cup of valve 28, fit the bleeding hose onto the valve, slacken the valve by 1/2 – 3/4 a turn and immerse the hose end into a clean transparent vessel filled with braking fluid; - slacken nut 4 and retighten it as first fluid drops appear; - depress abruptly clutch pedal 30, the valve being open, and release the pedal smoothly, the valve being closed, until no air bubbles come out of the hose.
Page 230: Combined (Pneumohydraulic) Drive Of Service Brakes
COMBINED (PNEUMOHYDRAULIC) DRIVE OF SERVICE BRAKES An oil-water separator* is installed in the truck brake system. The schematic diagram of service brake drive and the combined drive of the trailer brakes with the oil-water separator is shown in Fig. 133. Fig.
Page 231: Service Brakes Combined Pneumatic-Hydraulic Drive With Anti-Blocking System (Abs)
Fig. 134. Oil-Water Separator: 1 – cap; 2 – spring; 3 – sleeve; 4 – filter; 5 – screw; 6 – adsorber; 7 – return valve; 8 – body; 9 – throttle; 10, 11 – packing rings; I – outlet to brake system;...
Page 232 - an opportunity to increase its average safe travelling speed; - an extended service life of the tires; - improved dynamics of acceleration and movement on slippery sections of roads. The following components are additionally installed in the drive: brake pneumohydraulic booster 5 (see Fig.
Page 233 Fig. 136. Diagram of Service Brake Drive and Trailer Brakes Double-Line Drive with Anti-Blocking System: 1 – two-pointer pressure gauge; 2 – tow valve; 3 – regenerating bottle*; 4 – air bottle of front brake circuit; 5 – oil-water separator*; 6 – pressure regulator; 7 – triple safety valve;...
Page 234 Fig. 137. Connecting Diagram of Control Unit Plug-and-Socket Joints: 1 – “OFF-ROAD” mode switch; 2 – 15A fuse; 3 – auxiliary brake release relay; 4 – ignition; 5 – 5A fuse; 6 – pilot lamp; a – to auxiliary brake switch; b – to electropneumatic valve;...
Page 235 Table 1 Connection of Control Unit 18-Pin Plug & Socket Joint Terminal № Wire colour ABS component to be connected brown axle modulator blue brown axle modulator, left side blue brown axle modulator, right side blue black axle wheel sender, right side brown black axle wheel sender, left side...
Page 236 ABS operation and maintenance. Upon switching ON the starter and instru- ments, the ABS performs continuous diagnostics of troubles and informs the driver of its results. Pilot lamp 2 (Fig. 141) goes ON, when switching on the instruments, and goes OFF after checking ABS serviceability if no faults have been discovered. Fig.
Page 237: Design Features Of The Ural-4320-41, Ural-4320-40
a universal device working under the program recorded into program card. The 4463005010 program card is required for the truck ABS diagnostics. The “OFF-ROAD” mode can be used to generate more sliding (temporary blocking), when applying the truck brakes during its travelling across country. The mode is entered and cancelled by a button switch located on the dashboard.
Page 239 Parameter Ural-4320-0111-41, Ural-4320-1151-41, Ural-43203- 1151-41, Ural-44202-0311-41, Ural-44202-0511-41, Ural-4320-0911-40, Ural-4320-1951-40, Ural-4320- 1972-40 ENGINE Type, model YAMZ-236NE2, with compression ignition, four- stroke, turbocharged, six-cylinder, V-type Displacement, l 11.15 Rated power, gross, kW (hp), 169 (230) minimum Maximum torque, gross, N.m 882 (90) (kgf m), not less Speed, min at rated power...
Page 240 Controls and Instruments Fig.142. Dashboard: 1 –storage battery charging indicator (with 1322.3771 generator installed); 2 – two– pointer pressure gauge; 3 - air filter clogging alarm; 4 – oil pressure emergency drop lamp; 5 – coolant temperature gauge; 6 – oil pressure gauge; 7 – main beam telltale 8 –...
Page 241 volume in the tank is measured by an electrical level gauge installed in the tank and is controlled by the indicator on the dashboard. Fig. 143. Fuel System Diagram: 1,5,13,15,20-return fuel lines; 2,4,7,10,18-feeding fuel lines; 3-starting preheater fuel tank; 3-fuel drain hose; 6-low-pressure fuel pump; 8-coarse-mesh fuel filter; 9- manuel fuel feed pump;...
Page 242 stage dry-type air filter, charging air cooler, inlet pipelines, connecting hoses and fixing elements. The air filter is fitted on the right-hand truck fender. Fig.144. Fuel Feed and Engine Stop Control: 1- rod; 2-manual control rod; 3-fuel manual feed rod knob; 4- engine manual stop rod knob;;...
Page 243 For maintaining the first cleaning stage disconnect the air pipes, remove the cover, unscrew the fixings, take out the cardboard element, take off the air filter, remove dust from the bin cover. Wash the housing and cover either in diesel fuel or hot water, blow through with dry compressed air and dry.
Page 244 When using motor oils of higher viscosity, not below grade M-5 /14Д(м) (SAE 10W/40) the limiting temperature will be 95 °C. At the same time a short- time temperature rise up to 105 °C is permissible. Gas Exhaust System Gas exhaust system is intended for removal of waste gas and reducing of ex- haust noise.
Page 245 Section “Daily Maintenance” (DM) is supplemented by the following text: “In- spect visually the compensators (metal hoses) of the engine gas exhaust system for their tightness. Should the compensator be not tight dark exhaust trails will be seen on the compensator and parts surrounding it. When detecting non-tightness re- place the compensators”.
Page 246: Table Of Contents
CONTENTS Foreword..........Safety Requirements and Precautions.
Page 247 Anti-Blocking System (ABS)......Design features of the Ural-4320-41, Ural-4320-40 Trucks and their modifications with YAMZ-236HE2-3 Engine URAL-4320-10, URAL-4320-31 Trucks & Their Versions Operation Manual...

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4320-31