MTZ 900 Operating Manual
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MTZ 900 Operating Manual

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OPERATING MANUAL
TRACTORS
920/920.2/920.3
952/952.2/952.3
2009
1
MTZ
900/900.3
950/950.3
900 – 0000010 OM

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Summary of Contents for MTZ 900

  • Page 1 TRACTORS 900/900.3 920/920.2/920.3 950/950.3 952/952.2/952.3 900 – 0000010 OM OPERATING MANUAL 2009...
  • Page 2 Some technical data and illustrations given herein may differ from the actual ones for your tractor. The dimensions and weights are approximate (reference). For the detailed information, contact the MTZ trademark dealer. General note: The references to the “left” and “right” in the text of this Manual are given from the standpoint of the observer staying behind the tractor moving ahead.

  • Page 3: Table Of Contents

    Table of Contents Introduction Adopted Abbreviations and Symbolic Notations International Symbols Safety Precautions Technical Data Controls and Instruments Operating Instructions Unitization Adjustments Maintenance Troubleshooting Tractor Transportation and Towing Tractor Storage Appendix А. Electric Equipment...
  • Page 4 All rights reserved. This book shall not be reproduced or copied either fully or partially without written permission of the Minsk Tractor Works Republican Unitary Enterprise. ATTENTION OF THE TRACTOR OPERATORS! 1. Prior to operating the tractor, read carefully this User Manual and follow strictly its requirements.
  • Page 5 13. When using the tractor without drive shafts, put FDA lever to position “forced”. 14. Do not operate the tractor indoors without adequate ventilation (air exchange). Exhaust gases can lead to fatal outcome. 15. Towing the tractor with front wheels lifted is strictly forbidden. Otherwise, the FDA drive failure and emergency situation can occur.

  • Page 6: Introduction

    INTRODUCTION The MTZ wheeled universal tilling tractors of the 900 series belong to drawbar category 1.4 and are designed to perform a wide range of agricultural works: from soil preparation for sowing to harvesting and transporting operations; they can be used in forestry, municipal servicing, construction and industry.
  • Page 7 The distinctive features of the tractors described in the Manual: 1. Transmission with synchronized gearbox (7/2) and synchronized reducing gear (step- up gear): 14 forward and 4 reverse gears. 2. Hydrostatic power steering with the Danfoss metering pump, cylinder in steering trapezium and steering tie rod.

  • Page 8: Adopted Abbreviations And Symbolic Notations

    Adopted Abbreviations and Symbolic Notations — storage battery — differential lock — pre-heater control unit — starter control unit — diesel piston upper dead point — power take-off shaft — hydraulic mounted system — hydrostatic power steering LOHE — liquid oil heat exchanger —...

  • Page 9: International Symbols

    International Symbols Manufacture uses standard international symbols concerning the application of devices and the controls. Below are given the symbols with their meaning. — See Manual — Control manipulations — Brake — Fast — Parking brake — Slow — Horn —...
  • Page 10 — Lever – up — Fan — Lifting position of the — Windscreen washer distributor sliding valve — Lowering position of the — Windscreen wiper distributor sliding valve — Floating position of the — Rear screen wiper distributor sliding valve —...

  • Page 11: Safety Precautions

    Safety Precautions MTZ series 900 SAFETY PRECAUTIONS the neutral position and the PTO lever – in the OFF position. • Prior to starting the movement, Strict observance of safety precau- tions, accurate execution of tractor warn the bystanders and the per-...

  • Page 12: Mtz Series 900

    Safety Precautions MTZ series 900 any obstacle. switched-off gear (coasting), apply • the same gear both down and up- When moving with attached hill; mechanisms or implements, always apply a mechanism to lock on the - it is forbidden to work with the attachment in lifted position.

  • Page 13: Mtz Series 900

    Safety Precautions MTZ series 900 • Do not clean, adjust or maintain and a gauntlet on the hand. • To avoid burns, be careful when the equipment driven with PTO, when the engine is running. draining the cooling fluid or water...

  • Page 14: Mtz Series 900

    Safety Precautions MTZ series 900 of outputs and voltage is verified; line, take measures excluding igni- tion of flushing liquid vapours. - do not check the presence of • Do not operate the tractor in fire- electric current by producing a...

  • Page 15: Technical Data

    Specifications MTZ series 900 SPECIFICATIONS Parameter 920/920.2/920.3 950/950.3 952/952.2/952.3 900/900.3 А Length, mm: total 4120/4440 4120/4130/4440 4120/4440 4120/4130/4400 without weights 3840/4440 3970/4000/4060 3840/4060 3970/4000/4060 to wheels 3700 3840/3850/3850 3700 3840/3850/3850 В Width, mm 1970 С Height to cab top, mm...

  • Page 16: Mtz Series 900

    Specifications MTZ series 900 The serial number of the tractor is replicat- ed on the front end of the right-hand side member of the half-frame ( on the right plate of front balance weights ). Engine number ( is duplicated on engine name plate attached on the right of the cylinder block ).

  • Page 17: Mtz Series 900

    Specifications MTZ series 900 Transmission number (on the rear axle housing from behind). Transmission number for the tractor with hydraulic lift (on the rear axle housing at the joint with the gearbox on the right). FDA number (on the right-hand sleeve at the front of the FDA (822) or on the central housing at the front of the FDA (72)).

  • Page 18: Mtz Series 900

    Specifications MTZ series 900 Engine Д-243/243C Д-245.5/Д-245.5C Д-245.43 S2 Д-245.5 S2 Engine make Type Four-stroke, in- Four-stroke, in- Four-stroke, in- Four-stroke, in- line, naturally as- line, turbocharged line, turbo- line, turbo- pirated charged, with in- charged, with in- termediate charge...

  • Page 19: Mtz Series 900

    Type: Hydrostatic power steering with boost pump. steering cylinder in the steering linkage. Governor: mechanical, variable-speed Independent oil tank of HPS (for MTZ - (with antismoke pneumatic equalizer – for 900.3/920.3/950.3/952.3). diesel engines Д-245.5/Д-245.5C/ Safety valve adjustment pressure – 14 Д-245.5 S2/Д-245.43 S2).

  • Page 20: Mtz Series 900

    Gearbox engaged if the II range is selected. Type: 7/2, mechanical, stepwise, syn- chronized, dual-range. Calculated speeds (km/h) of MTZ 900 series tractors: Rated engine rotational speed, rpm: 2200 Rated engine rotational speed, rpm: 2200 Rear tyres: 16.9R38 Rear tyres: 18.4R34...
  • Page 21 Specifications MTZ series 900 Rated engine rotational speed, rpm: 1800 Rated engine rotational speed, rpm: 1800 Rear tyres: 16.9R38 Rear tyres: 18.4R34 Synchronized multiplier Synchronized splitter Gear Range V tr, Gear Range V tr, Motion Motion number number km/h number...
  • Page 22 Specifications MTZ series 900 Rated engine rotational speed, rpm: 1800 Rated engine rotational speed, rpm: 1800 Rear tyres: 16.9R38 Rear tyres: 18.4R34 Reverse gear Reverse gear Gear Range V tr, Gear Range V tr, Motion Motion number number km/h number...

  • Page 23: Rated Engine Rotational Speed,

    Specifications MTZ series 900 Calculated speeds (km/h) of the MTZ tractors of the series 900 with a speed-reducing unit: Rated engine rotational speed, rpm: 1800 Rear tyres: 18.4R34 Synchronized splitter V tr with a mechanical speed-reducing unit, km/h V tr with a hydraulic speed-reducing unit, km/h...
  • Page 24 Specifications MTZ series 900 Rated engine rotational speed, rpm: 2200 Rear tyres: 18.4R34 Synchronized splitter V tr with a mechanical V tr with a hydraulic speed-reducing unit, km/h speed-reducing unit, km/h Mechanical Mechanical Hydraulic speed- speed- Hydraulic speed-reducing speed-reducing reducing unit...
  • Page 25 Specifications MTZ series 900 Rated engine rotational speed, rpm: 1800 Rear tyres: 16.9R38 Synchronized splitter V tr with a mechanical speed- V tr with a hydraulic speed-reducing unit, km/h reducing unit, km/h Mechanical Mechanical Hydraulic speed- speed- Hydraulic speed-reducing speed-reducing...
  • Page 26 Specifications MTZ series 900 Rated engine rotational speed, rpm: 2200 Rear tyres: 16.9R38 Synchronized splitter V tr, with a mechanical V tr with a hydraulic speed-reducing unit, km/h speed-reducing unit, km/h Mechani- Mechanical cal speed- Hydraulic speed- speed- Hydraulic speed-reducing...
  • Page 27 Specifications MTZ series 900 Rated engine rotational speed, rpm: 1800 Rear tyres: 16.9R38 Reverse gear V tr, with a mechanical speed-reducing unit, km/h Mechanical speed- Mechanical speed- reducing unit range reducing unit range I Motion Gear No. Range No. V tr, km/h 4.28...
  • Page 28 Specifications MTZ series 900 Rated engine rotational speed, rpm: 1800 Rear tyres: 18.4R34 Reverse gear V tr, with a mechanical speed-reducing unit, km/h Mechanical speed- Mechanical speed- reducing unit range reducing unit range I Motion Gear No. Range No. V tr, km/h 4.28...
  • Page 29 Specifications MTZ series 900 Synchronized splitter (reducing gear) forward motion and reverse (i=-1.07 or Type: mechanical, synchronized, with i=-1.88). Installed instead of step-down direct drive and retarding gear. Located reducing gear and allows obtaining 9 between the clutch and gearbox and forward gears and 8 reverse ones.

  • Page 30: Rear Axle

    • Р80-3/4-222-ЗГг (Р80-3/4-111-ЗГг op- Transmission oils: Тап-15В, ТСп-15К or tional); ТСп-10 (SAE 80W-90); ТАД-17И. • Р70-1221C; RS213 MTZ — for tractors Drive: from transfer gear by two cardan with power governor; shafts with intermediate support. • РП70-1221; RS213 Mita flow-type —...
  • Page 31 900/900.3/950/950.3) main; voltage of 24 V). 13.6-20 (MTZ-920/952) main; Alternator 11.2-20 (MTZ-920/952) optional; 14 V, 1000 W (1150 W – for MTZ- 360/70R24 (MTZ-920.2/920.3/ 900.3/920.3/950.3/952.3). 952.2/952.3) main. Lighting system and light alarm: • front headlights with lower and dis- Rear: tance light;...

  • Page 32: Controls And Instruments

    Controls and Instrumentation MTZ series 900 CONTROLS AND INSTRUMENTATION 1. Cooling system radiator shutter con- trol. 18. Control of the left rear outputs of the 2. Emergency control lamps switch. hydraulic system. 3. Steering-wheel-mounted multifunction 19. Tachospeedometer control board. switch (turn, turn indicators, up- 20.
  • Page 33 39. Signal switch arm of power and posi- ent/synchronized). tion control sensors (if installed). 45. Arm for fixing the hinging mechanism 40. SB switch (on the MTZ- in the lifted position (version with a power 900.3/920.3/950.3/952.3 tractors, the SB governor).
  • Page 34 Controls and Instrumentation MTZ series 900 Instrumentation and Switches Starter and instrumentation switch (1) Switch (1) has four positions: • 0 – “Off” • I – “Consuming units On” • II – “Starter On” (not fixed) • III – “Radio receiver ON” (key turned counter-...
  • Page 35 Controls and Instrumentation MTZ series 900 1. Instrumentation The schematics of the instrument dashboards 80-3805010-Д1 and 826-3805010 are giv- en in the section “Appendix”. The instrumentation includes: - the combination meter (Р2) with sensors; - the electric tachospeedometer (Р1) with the control board (А3) and sensors;...
  • Page 36 PTO II. The electric signal of the rotational speed is taken from the phase winding of the alternator. 1.2. Tachospeedometer control board (Fig. 2) The control board is installed in the dashboard and serves for programming the tachospeedometer to the specific model of the MTZ tractor. PARAMETER VALUE Fig. 2. Control board (А3): 1 –...
  • Page 37 Controls and Instrumentation MTZ series 900 Table 1 Number of teeth Tractor make MTZ 590; 80.1; 890; 900; 922; 950 Table 2 Tyre 18,4R34 16,9R30 18,4L30 15,5R38 9,5-42 16,9R38 18,4R38 (Ф-11) mark Rk, m 0.698 0.720 0.755 0.730 0.770 0.800 0.830...
  • Page 38 Controls and Instrumentation MTZ series 900 The identification of the block pins is given in Table 4. Table 4 Identification to the terminal “–“ to the power supply unit “+12В” to the board output “Parameter selection” to the board output “Parameter value”...
  • Page 39 Controls and Instrumentation MTZ series 900 1.6. Combined indicator КД 8083 Fig. 4. Tachospeedometer (Р1): 1 – Engine rotational speed indicator (pointer indicator). 2 – PTO 1000 rotational speed scale (opposite to the respective value of the PTO ro- tational speed).
  • Page 40 Controls and Instrumentation MTZ series 900 1.7. Programming the indicator КД8083 Programming procedure: - remove the control board cover; - press the button (1) of the control panel and hold it down for at least 2 seconds; - the display (7) shows the mode “Adjusted total engine running time”. In this case, the LED located next to the symbol “Т”...
  • Page 41 Gear ratio of the wheel reduction Tractor make gear (K1) 1.00 MTZ 590; 80.1; 890; 900; 922; 950 according to the number of teeth at the place of installation of the speed sensors (param- eter “Z1”) from Table 6: Table 6...
  • Page 42 Controls and Instrumentation MTZ series 900 Table 8 Gear ratio of the alternator Engine mark drive (K2) Д- 2.36 Д-242 Д-243 Д-245 245.5 3. To display correctly the PTO’s rotational speed (540 and 1000), it is necessary to pro- gram the gear ratios of the PTO 540 “K3” and PTO 1000 “K4” from Table 9 and the num- ber of teeth of the pinion at the place of installation of the PTO sensor “Z2”...
  • Page 43 Controls and Instrumentation MTZ series 900 1.8. Indicator Diagnostics and Troubleshooting 1. The diagnostics of the faults according to items 1-3 and 5 is similar to that of the tachospeedometer; 2. Over- or understated readings of the engine rotational speed and PTO’s rota-...
  • Page 44 The combined indicator (hereinafter referred to as the CI) and the control board (herein- after referred to as the CB) monitor the operational parameters of the systems and units of the MTZ tractors and provide the operator with the information on malfunction or failure of a particular system.
  • Page 45 Controls and Instrumentation MTZ series 900 Operating principle of the PTO rotational speed indicator: 1. In the absence of the PTO rotational speed sensor, the designations of the “540” and “1000” scales as well as the indicator of the scale ranges HG11, HG12 light up simultaneously on starting the engine (when a signal comes from the phase winding of the alternator).
  • Page 46 Controls and Instrumentation MTZ series 900 from the control unit of the range reduction gear (if provided). This parameter is displayed on the information field “1”. If the control units are absent or not connected or in case of wire breakage, the letter “A” is displayed in the information field “1”.
  • Page 47 Controls and Instrumentation MTZ series 900 HG5 is the indicator of switching on the upper beam of the road headlights; it lights up when the upper beam of the road headlights is ON. Note! The indicators light up and go out synchronously with the changes in the states of the system sensors.
  • Page 48 Select from the Table Gear ratio of the wheel reduction Tractor make gear (I) 1.000 MTZ 590; 80.1; 890; 900; 922; 950 Parameter “R” R is the rear wheel rolling radius (mm); Select from the Table 18,4R34 Tyre mark 16,9R30 18,4L30 15,5R38 9,5-42 16,9R38 18,4R38 (Ф-11)
  • Page 49 Controls and Instrumentation MTZ series 900 Select from the Table Gear ratio of the alternator Engine mark drive (К2) Д- 2.36 Д-242 Д-243 Д-245 245.5 2.41 D-260 3. To display correctly the PTO’s rotational speeds (540 and 1000), it is necessary to program the gear ratio PTO “КV2”...
  • Page 50 Controls and Instrumentation MTZ series 900 IMPORTANT! Each time the power supply of the CI is switched ON, the functioning of the pointer indicators and PTO indicator scale elements is tested. Within one se- cond after this, the indicator pointers deviate from the initial marks beyond the follow- ing first marks of the scales (beyond “5”...
  • Page 51 Controls and Instrumentation MTZ series 900 Table 12 Contact Address of the XP2 connector pin To the terminal “–“ (common) To the control board contact “Indication Mode” To the control board contact “Parameter Selection” To the control board contact “Parameter Value”...
  • Page 52 Controls and Instrumentation MTZ series 900 8. No readings of the tractor motion speed: - Check the presence of the signals from the both speed sensors (BV1, BV2). 9. The “0km/h----” or “----0кm/h” readings appear on the indicator display within 10- 12 s after starting the motion of the tractor: - no signal from the left speed sensor (BV2) check the serviceability of the sensor.
  • Page 53 Controls and Instrumentation MTZ series 900 1.13. Setting and Adjustment of the speed sensors (BV1, BV2) (Fig. 6) The speed sensors (2) are fastened by means of the bolts (3) to the cover of the rear axle housing (1) in the zone of the left and right fi- nal pinions (6) of the final drives.
  • Page 54 Controls and Instrumentation MTZ series 900 1.14. Combination meter (Fig. 7) Indicator of the air pressure in the pneumatic system (3) with the red emergency pressure The combination meter includes the five control lamp. It operates with the air pressure sensor (ВР2).
  • Page 55 Controls and Instrumentation MTZ series 900 Indicator of the fuel level in the tank (4) with orange control lamp of reserve level. It op- erates with the fuel level sensor (BN1). The instrument has the points: 0-1/4-1/2-3/4- Do not allow consuming the fuel to empty tank (instrument pointer is at orange zone).
  • Page 56 Controls and Instrumentation MTZ series 900 1.16. Combination Meter Diagnostics and Troubleshooting 1. No backlight of the instrument scales on setting the SA10 central light switch: 1. Check the presence of the power supply voltage at the terminal “1” of the block “Х1”...
  • Page 57 Controls and Instrumentation MTZ series 900 or repair the fuel level indicator. 4.2. The indicator pointer goes off-scale: 1. Breakage of the wire to the terminal «2» of the block “Х1” (output “–“ of the power supply); 2. If there is no breakage, the fuel level indi- cator is faulty.
  • Page 58 Controls and Instrumentation MTZ series 900 Steering-Wheel-Mounted ( Multifunction) switch (1) It ensures the switching-on of the turn indicators, toggling the beam of the road headlights (lower/upper beam), warning by upper beam warning and horn beep . Turn indicator Turning the arm (1) up or down switches on the right or left turning indicator, re- spectively.
  • Page 59 Controls and Instrumentation MTZ series 900 Front windscreen wiper switch (1) Pressing the button (1) switches front windscreen wiper on. The switch has three positions: • OFF; • Low speed ON; • High speed ON. NOTE: In the “OFF” position wind-...
  • Page 60 Controls and Instrumentation MTZ series 900 Control lamps of the dashboard (dashboard 80-3805010-Д1) 1 and 14 – Buttons for testing the ser- 5 – Starting aid lamp: This orange con- viceability of the control lamps unit. On trol lamp is on when pressing the but- pressing the button, all the lamps shall ton of electric torch pre-heater (ETP).
  • Page 61 Controls and Instrumentation MTZ series 900 Control lamps of the dashboard (dashboard 826-3805010) lamp. The lamp (green) is on when 1 – Reserved indicator (green) switching automatic differential locking 2 – Reserved indicator (green) (ADL). 3 – Reserved indicator (red) 8 –...
  • Page 62 Controls and Instrumentation MTZ series 900 Fuses 10 – Lower beam of the right road head- Three electric circuit fuse boxes are in- stalled in the dashboard. To get access light (7.5 A); to the fuses, remove the screw on the 11 –...
  • Page 63 Controls and Instrumentation MTZ series 900 In case of blowing of the fuse due to a short circuit, proceed as follows: 1. Connect the wires from the pilot lamp to the terminals of the fuse box at the place of the fuse blown.
  • Page 64 Controls and Instrumentation MTZ series 900 Electric equipment connector components A standard 8-pin socket is designed for connecting the current-consuming units of a transport machine or trailed agricul- tural implement. It is installed on the cab’s rear support. A plug of the wire bundle of the hitched machines is con- nected to the socket.
  • Page 65 Controls and Instrumentation MTZ series 900 Gearbox single-lever control The 7F/2R synchronized gearbox combined with synchronized reduction gear allows ob- taining 14 forward and 4 reverse gears . The gears are shifted by means of the lever (1) in accordance with the shifting pattern. Prior to put- ting in the gear, select the required range (stage).
  • Page 66 Controls and Instrumentation MTZ series 900 Gearbox two-lever control of the range reduction gear release slightly ATTENTION: To avoid the increased noise The 7F/2R mechanical two-range fixed- in the gearbox, the design of the gearbox ratio transmission gearbox with two-lever...
  • Page 67 Controls and Instrumentation MTZ series 900 Shuttle-gear control (if installed) The shuttle gear is controlled with lever (2) having the following positions: • ON – rearmost position; • OFF (forward motion) – foremost position. ATTENTION! When putting the gearbox lever to position “R” (reverse motion), the lever being in rearmost position, the tractor will move forward.
  • Page 68 Controls and Instrumentation MTZ series 900 Control of engagement of the front driving axle (MTZ 920/920.2/ 920.3/952/952.2/952.3) The control lever (1) has three fixed po- sitions: • “FDA OFF” – lowermost position. Use it when driving on hard surface roads to prevent the increased wear of the tyres.
  • Page 69 Controls and Instrumentation MTZ series 900 Rear PTO control Switch of the independent and syn- chronized drive of the rear PTO Lever (1) has three positions: • “PTO independent drive ON” – right- most position; • “PTO synchronized drive ON” – left- most;...
  • Page 70 Controls and Instrumentation MTZ series 900 PTO control lever The PTO control lever (1) has two posi- tions: • PTO OFF – front position of the lev- er (1); • PTO ON – back position of the lever (1). Control of the rear axle differential...
  • Page 71 Controls and Instrumentation MTZ series 900 Rear control (for tractors equipped with a hydraulic lift) To engage the rear PTO, the key switch (4) and push-button switch (5) located on the panel above the right control board are used. The switch (4) has two fixed positions: •...
  • Page 72 When releasing the arm, it returns to “Neutral” (for the distributors Р80-3/4- 111; РП-70-1221; РП-70-1221С; RS213 Mita; RS213 MTZ). For the dis- tributors Р80-3/4-222, this position is fixed. The handles are returned auto- matically to the “Neutral” position at the pressure of 15.5…20 MPa.
  • Page 73 Remote control of the hydraulic sys- tem distributor (if installed) If the tractors are equipped with the RS- 213 MTZ hydraulic distributors, the re- mote control of the distributor spool valves is executed by the manipulator (joystick) (1) and arm (2) with the two- way cords.
  • Page 74 Controls and Instrumentation MTZ series 900 Control of the power/position gov- ernor of the hydraulic system The control is performed by means of the lever (1). The control method, ei- ther power or position shall be previ- ously set. The lever (1) has the following posi- tions: •...
  • Page 75 Controls and Instrumentation MTZ series 900 Switch of power and position con- trol methods (1) To get access to the switch, remove the cover under the seat. The switch has the following positions: • “N” – OFF; • “I” – Power control;...
  • Page 76 Controls and Instrumentation MTZ series 900 RMA hydraulic lift control The hydraulic lift is controlled by means of two levers (1, 2) located on the board in the cab at operator’s right hand. The power control arm (1) is located...
  • Page 77 Controls and Instrumentation MTZ series 900 Compressor control The handle (1) has two positions: • “Compressor ON” – when turning the handle so that the arrow on the arm would be directed backwards with respect to tractor motion; • “Compressor OFF” – when turning the handle to 180...
  • Page 78 Controls and Instrumentation MTZ series 900 Cab heater control When switching the heater on, ensure that the following conditions are met: 1. After filling the cooling system, start the engine and let it work at a medium rotational speed to heat wa- temperature +50C…+60C, after which open the...
  • Page 79 Controls and Instrumentation MTZ series 900 MTZ Seat The seat is provided with mechanical suspension consisting of two spiral tor- sion springs and a gas-filled two-way shock absorber. Shear-type guiding mechanism ensures strictly the vertical displacement of the seat. Dynamic mo- tion of the seat is 100 mm.
  • Page 80 Controls and Instrumentation MTZ series 900 Grammer Seat (if installed) Important! Prior to beginning the op- eration of the tractor, adjust the seat to the position being the most conven- ient for you. Perform all the adjust- ments while sitting on the seat.

  • Page 81: Operating Instructions

    Operating Instructions MTZ series 900 OPERATING INSTRUCTIONS Running-in Tractor pre-operation When preparing a new tractor for opera- Your new tractor will work reliably and tion, re-activate it: To do this: • remove protective covers and plugs fit- for long time, provided that running-in is made properly and necessary mainte- ted on the engine;...
  • Page 82 Operating Instructions MTZ series 900 Starting the engine Starting under normal conditions: Check the level of oil in the crankcase and of cooling fluid in the radiator and the pres- ence of fuel in the tank. IMPORTANT! Never start the engine with the empty cooling system! IMPORTANT! Start the engine and check the instrument operation while sitting in the operator’s seat only.
  • Page 83 Operating Instructions MTZ series 900 • Starting at low temperatures Set the PTO control lever (3) to the (+4°С and below) and the “Synchronous– OFF position Independent” switching lever – to the “Neutral” position; To avoid the damage of the Important! •...
  • Page 84 Operating Instructions MTZ series 900 Starting the tractor motion ATTENTION! When selecting the re- quired gear, use the gearbox switching diagram. To start the movement, proceed as fol- lows: • step on the clutch pedal fully; • select the required gearbox range;...

  • Page 85: Stopping The Tractor

    Operating Instructions MTZ series 900 Stopping the tractor Steering control To stop the tractor: IMPORTANT! tractors • Reduce the engine crankshaft speed; equipped with the hydrostatic power • Step on the clutch pedal; steering system. If the engine is • Set the change gear lever to neutral...
  • Page 86 Operating Instructions MTZ series 900 Switching over the transmission with a shuttle gear (if installed) Switch the gearbox and the shuttle gear in accordance with the changeover scheme . Using the tractor in the “shuttle” mode makes it possible to change quickly the di-...
  • Page 87 Operating Instructions MTZ series 900 Operation of the tractor equipped with a speed reducer (optional) 1. Set the change gear lever (4) to neutral position and reducing gear lever (1) to foremost or rearmost positions. 2. Set the speed reducer controls as fol- lows: •...
  • Page 88 • combined control (adjusting the cultiva- tion depth according to the soil condi- tion with limiting the maximum depth by the position control). The MTZ tractors with index “.2” are equipped with RMA hydraulic lift and do not have power governor...
  • Page 89 Operating Instructions MTZ series 900 Traction hitch mechanism ТСУ-2 (hy- Working equipment to attach ag- draulic hook): to operate single-axle trailers and other machines. ricultural machines to the tractor (for tractors with power governor) ATTENTION! Prior to attaching the ma- chines read carefully this section.
  • Page 90 Operating Instructions MTZ series 900 Rear mounted attachment (HMS with power governor) The second-category three-point mount- ed attachment ensures the connection of mounted and semi-mounted agricultural machines and implements to the tractor with the following attachment compo- nents: • hanger axle length “L” (distance be- tween joints “A”...
  • Page 91 Operating Instructions MTZ series 900 To increase the clearance when cultivat- ing the high-stem crops, install the front ends of the lower rods onto the addition- al hanger axles located at the distance of 110 mm above the lower rod axis. To im-...
  • Page 92 Operating Instructions MTZ series 900 Reinforced rear mounted attachment The tractors with power governors may be equipped optionally with a reinforced rear mounted attachment with telescopic lower rods, which are to be installed onto the shaft with the diameter of 35 mm in- stead of that with the diameter of 32 mm.
  • Page 93 Operating Instructions MTZ series 900 Rear mounted attachment of the tractors equipped with the hydraulic lift Machines: mounted (ploughs, cultivators, seeders, cutters, etc.), semi-mounted (ploughs, soil-tilling units, seeders, potato combines, etc). Lower rods Telescopic, one-piece - optional Length of lower rods, mm:...
  • Page 94 Operating Instructions MTZ series 900 Traction hitch mechanisms (THM) of the tractors equipped with hydraulic lift ТСУ-1Ж-01 (double cross-bar) ТСУ-1* (single cross-bar) Machines: semi-mounted (seeders, potato-planters, potato combines, vegetable- harvesting machines, etc.), semi-trailer (mowing machines, balers, haulm gatherers, etc.). ТСУ-1Ж-01 (double cross-bar) as a unit with telescopic rods –...
  • Page 95 Operating Instructions MTZ series 900 Г15 Lifting THM of the tractors equipped with hydraulic lift 1.ТСУ-2В (fork) Machines: semi-trailed (semi-trailers, machines for fertilizing, etc.), trailed (disk harrows, tillers, hoeing ploughs, hitch of harrows, cultivators and seeders, etc.). Fork with the possibility of the verti-...
  • Page 96 Operating Instructions MTZ series 900 2. ТСУ-ЗВ (fork) Machines: trailed (automobile-type two-axle trailers, etc), semi-trailed (same as for ТСУ- 1Ж-01). Hitch mechanism Rotating fork with vertical displacement Distance from the fork to support- ing surface for machines without 288.. .808 (962*) stepwise via 65 mm...
  • Page 97 Operating Instructions MTZ series 900 Г17 3. ТСУ-1М (dragbar) Machines: heavy trailed with active drive of driven elements. Hitch mechanism Fork with variation of position relative to PTO face Distance from the fork to supporting surface, 402 (297*) Distance from PTO face to attachment pin...
  • Page 98 Operating Instructions MTZ series 900 Hitching machines to the tractor 1. When hitching machines to the tractor, make sure first that there is nobody within hitching zone. 2. Lower the attached device to the lower position by using the power governor han- dle, drive the tractor back and attach the machine to lower rods.
  • Page 99 Operating Instructions MTZ series 900 The machine (implement) is also attached to the tractor by the automatic hitch CA-1 connected to the tractor hookup at three points (two rear joints of longitudinal rods and rear joint of the central rod).
  • Page 100 Operating Instructions MTZ series 900 Partial locking of telescopic tie bars To ensure the required lateral displace- ment of the machine, e.g., a plough, adjust the tie bars in the operating condition as follows: • rotating the screw (2), set the handle (3) at the middle of flat “B”;...
  • Page 101 Operating Instructions MTZ series 900 Inner tie bars (2)* They are also used to limit the lateral swinging of the machines in working and transport states. NOTE: The telescopic tie bars are installed from the outside only Partial locking (for tillage)
  • Page 102 Operating Instructions MTZ series 900 External chain couplings (2) Partial locking Ensure the horizontal displacement of the machine under working condition by con- necting restricting chains to the bottom apertures of the holder (1) and adjusting the chain length using tie bars (2) to ob-...
  • Page 103 Operating Instructions MTZ series 900 Additional hanger axles of the lower rods of the hinging mecha- nism When cultivating high-stem crops, install the lower rods (3) onto the additional hanger axles. When doing this, attach the restricting chains (2) to the third from bot-...
  • Page 104 Operating Instructions MTZ series 900 Front weights (1) and (5) To preserve the normal steerability of the tractor under considerable unloading of the front axle when operating heavy mounted machines and implements, in- stall additional weights (1) (10 pieces. of 20 kg each) or weights (5) (10 pieces.
  • Page 105 Operating Instructions MTZ series 900 Traction hitch mechanism ТСУ-ЗК* (trailer gear with automatic hitching) Attention! 1. Never try to use the trailer gear for working with semi-trailers or single-axle trailers. 2. When towing the trailers, always apply safety chains. 3. Never use rear hinging mechanism when trailer gear is installed on the tractor.
  • Page 106 Operating Instructions MTZ series 900 Mechanism for fixing the hanging in the transport mode The fixing mechanism (2) is in- tended for fixing the mounted attachment in the transport position to prevent the mounted implements from lowering. Applying this mechanism ensures the...
  • Page 107 Operating Instructions MTZ series 900 Controlling the hydraulic system and Controlling the hydraulic system and mounted attachment without power mounted attachments with a power (posi- governor tion) governor On the tractors without power governor, Power control the mounted attachment is controlled by...
  • Page 108 Operating Instructions MTZ series 900 When preparing the unit for operation with power control application, proceed as fol- lows: 1. Install a central rod of the hitch to the up- per hole of the shackle (position I) . 2. Connect the mounted machine with the tractor hitch.
  • Page 109 Operating Instructions MTZ series 900 Operation of the tractor equipped with a power governor When the depth obtained during the tillage with the power control handle put to the maximum depth is insufficient, reposition the central rod (1) of the hitch to the mid- dle hole of shackle (2).
  • Page 110 Operating Instructions MTZ series 900 Position control When applying the position control, the power governor of the hydraulic system ensures the automatic keeping of the specified position of the agricultural ma- chine relatively to the tractor frame. It is recommended to use the position con-...
  • Page 111 Operating Instructions MTZ series 900 Operation rule and techniques Set the mounted machine to the required position. To lower it, push the handle (2) forward. The farther the handle is pushed forward, the lower the machine is. Having set the machine to the required height, move limiter (1) to the stop against the han- dle and fix it.
  • Page 112 Operating Instructions MTZ series 900 Operation of the tractor equipped with the HMS with a hydraulic lift Compared to the above-described ADCS system with an autonomous power gov- ernor and power cylinder, the HMS with a hydraulic lift is controlled by two levers lo- cated in the cab on the right control panel: •...
  • Page 113 Operating Instructions MTZ series 900 Power control Use this control mode when operating the mounted machines (ploughs and cul- tivators). Move the power control handle (1) to foremost position in the direction of the tractor motion (digit “9” on the board).
  • Page 114 Operating Instructions MTZ series 900 Peculiarities of operation of the tractor with machines requiring the drive from the rear PTO a) prior to attaching the machine to the tractor, make sure of correct adjust- ment of the rear PTO control;...
  • Page 115 Operating Instructions MTZ series 900 e) having installed the driveline, make sure that the components of the driveline tel- escopic connection do not abut during extreme machine positions relative to the tractor; the minimum overlap of the driveline telescopic connection shall be...
  • Page 116 Operating Instructions MTZ series 900 The tractor motion with the synchronous Operating the trailers and trailed ma- chines PTO drive engaged is allowed at the speed of not more than 8 km/h; f) Disengage the PTO when turning the The single-axle machines like semi-...
  • Page 117 Operating Instructions MTZ series 900 It is strictly forbidden to use the rear A rear pulley is installed on the rear hinging when the trailer gear is in- PTO reducing gear cover and driven stalled on the tractor! by the PTO slotted shank. To prevent...
  • Page 118 The table below gives recommended combinations of front and rear tyres. Allowable combinations of front and rear tyres for the MTZ 920/920.2/920.3, MTZ 952/952.2/952.3 tractors Front tyres 920/952 920.2/920.3/952.2/952.3...
  • Page 119 Operating Instructions MTZ series 900 Norm of the tyre loads for selecting the operating mode at different inner pres- sures Tyre load, kg at the inner pressure, MPa and at the speed designated by the symbol 0.08 0.12 0.14 0.16 0.18...
  • Page 120 Operating Instructions MTZ series 900 Allowable load variation on guide and drive wheel tyres, depending on speed Speed, km/h Load variation, %, on the guide wheel tyres with the speed symbol А6 (30 km/h) А8 (40 km/h) ‫٭‬ ‫٭‬ For tyres with ply-rating 6 and more, inner pressure shall be increased by 25%.
  • Page 121 Operating Instructions MTZ series 900 In case of twinning the wheels, their total capacity shall not exceed that of a single tyre more than 1.7 times. In case of twinning the wheels, set the air pressure in the tyres of the outer wheels to be 1.2…1.5 times lower than in those of the inner wheels.
  • Page 122 Operating Instructions MTZ series 900 Liquid ballast Filling the tyres with liquid ballast is only used in case of insufficient grip of the wheel with the soil under unfavourable conditions (overwatered soil, etc.). NOTE: It is not recommended to fill the front tyres with ballast, since it impairs the trac- tor steerability.
  • Page 123 Operating Instructions MTZ series 900 Installing twinned rear wheels To increase cross-country ability, twinned rear wheels with the standard size of 9.5- 42 and 15.5R38 can be installed on the tractor with the use of additional spacer plates. To mount an additional wheel,...
  • Page 124 Operating Instructions MTZ series 900 Pneumatic system of trailer brake control Single-line pneumatic actuator 1 – compressor; 2 – pressure regulator; 3 – air intake valve; 4 – tank; 5 – pressure indi- cator; 6 – emergency pressure pilot lamp; 7 – pressure transducer; 8 – emergency pressure sensor;...
  • Page 125 Operating Instructions MTZ series 900 off that prevents compressed air outflow from the tractor system.
  • Page 126 Operating Instructions MTZ series 900 Two-line pneumatic drive (MTZ- 900.3/920.3/950.3/952.3) Pneumatic drive is also used for inflating The tractors may be equipped with two- the tyres and other purposes, when the line pneumatic brake actuator for the compressed air power is required.

  • Page 127: Unitization

    The section “TRACTOR AGGREGATION” contains the necessary information on the pecu- liarities of the intended use of the MTZ tractor of your model including the recommendations on the aggregation, selection of machines, conditions of safe use of the tractor and deter-...
  • Page 128 2. Types and classification of agricultural machine-tractor aggregates based on the MTZ tractors The agricultural aggregates operated on the basis of the MTZ tractors are classified ac- cording to the following operational signs:  Kind of the process to be carried-out: ploughing, sowing, planting, soil-cultivating, harvesting and others.
  • Page 129 Aggregation MTZ series 900  The number of machines within the MTA: single- and multi-machine aggregates. A machine performing several working functions, the process modules of which are not in- tended for using as separate technical mean, is considered to be a single machine.
  • Page 130 1. Aggregation of the attached machines (loaders, bulldozers) is not related to the in- tended use of the MTZ tractor. 2. No permit for joint operation of the MTZ tractors with the mounted, trailed, semi- mounted and semi-trailed machines is required provided such operation comply fully with this Operating Manual for the tractor and does not fall outside the allowable framework of its use.
  • Page 131 The interrow cultivation of row crops is provided using the narrow tyres from addition- al equipment in the row-spacing of 450 to 900 mm. However, the interrow cultivation of maize, cotton and similar cultures using the tyres from the standard equipment is also possible.
  • Page 132 (operate) such a machine to avoid possibly heavier troubles in the pro- cess of its aggregation, which could cause the breakdowns of the tractor Fig. 1. Main kinds of the machine-tractor aggregates based on the MTZ tractor...
  • Page 133 It is necessary to keep also in mind that the speed and operating depth are often limited by the agrotechnical requirements. The determination and assessment of the possibility of aggregation of the MTZ tractor with agricultural machines shall be performed in several stages.
  • Page 134 Aggregation MTZ series 900 Stage I Data preparation and acquisition a. Read carefully the Operating Manual for the tractor. Determine the main technical characteristics of the tractor: drawbar category, rated tractive force, engine power, allowable mechanical and hydraulic takeoff power, coupling dimensions/type (of the traction hitch mechanism or mounted attachment;...
  • Page 135 When purchasing the new machines to be used together with the tractor, it is necessary to specify the presence of the necessary working equipment providing for the possibility of aggregating with the MTZ tractor of your model. For the machines located behind the tractor and driven from the PTO, it is necessary to order the cardan shaft of the necessary length and type, with the respective coupling dimen- sions.
  • Page 136 Aggregation MTZ series 900 b. Checking the fitting of the tractor within the row-spacing of the crops to be cultivated with determining:  the correspondence of track and tyre profile width;  agrotechnical clearance;  protective zones to the tyres.
  • Page 137 The main condition of the optimal aggregation of the MTZ tractor is proper use of the en- gine power which is characterized by the load factor expressing the degree of use of the tractor’s rated power for performing the jobs by the aggregated agricultural machines.
  • Page 138 Aggregation MTZ series 900 The rear mounted attachment of the standard size НУ-2 is manufactured according to State Standard ГОСТ 10677 (corresponds to category 2 according to ISO 730/1). The main parameters of the rear mounted attachment specified in the technical data are given for fit- ting the tractor with the standard size of the basic tyres with the standard static radii speci- fied by the tyre manufacturer.
  • Page 139 Aggregation MTZ series 900 - when operating the mounted and semi-mounted soil cultivating machines with passive tools intended for overall tillage (share and chisel ploughs, stubble-breaking ploughs, deep tillers and other machines), it is necessary to ensure the free motion (swinging) of the lower rod in the horizontal plane to the distance of 125 mm to each side from the longitudinal plane of the tractor unblocking the limit rods;...
  • Page 140 Aggregation MTZ series 900 - correction of the operating depth; - possibility of operation with the machines provided with height-related method of ad- justment of the height of travel of the tools (the depth is adjusted by the carrier wheel of the machine).
  • Page 141 Aggregation MTZ series 900  compatibility of the coupling dimensions;  the machines are provided with fixed drawbars;  the trailer hitches are equipped with a device facilitating the coupling of the trailer with/uncoupling of it from the traction hitch device of the tractor;...
  • Page 142 Aggregation MTZ series 900 Fig. 2 Characteristics of the PTO drive Table 2 Designa- PTO 1 PTO 1С PTO 2 Characteristic tion Spline length, mm Outer diameter, mm Number of splines Table 3 Rotational speed, rpm Transmitted power, kW Shank type (h.p.)
  • Page 143 Aggregation MTZ series 900 term) Disen- 55.0 55.0 gaged Overlapping the telescopic el- ements of the cardan shaft shall be at least 110…200 mm to avoid the disconnection and jamming of the coupling (d).
  • Page 144 Aggregation MTZ series 900 8. Determining the weight of the tractor, machine and ballast, loads on the traction hitch mechanism and mounted attachment, tyres and axles of the tractor and steera- bility criterion The tractor and its structural members including also tyres are designed for trouble-free operation in a certain range of vertical loads and speeds specified in the Operation Manual for the tractor.
  • Page 145 Aggregation MTZ series 900 The value of the load on the coupling arrangement of the machine can be determined us- ing the following two methods: 1. On a balance. The machine is placed on the balance in such a way that there would be only coupling ar-...
  • Page 146 Aggregation MTZ series 900 9. SELECTING THE MOTION SPEED The speed of motion of the tractors on public roads can be limited by the technical possi- bilities of the tractor and aggregated machine in accordance with the sign provided on the technical mean, characteristics of the machines (method of aggregation, overall dimensions, operating weight and absence of the braking system) as well as motion conditions.
  • Page 147 Aggregation MTZ series 900 - rear 15.0 3. Motion on slopes and sharp turns; overcoming 10.0 obstacles 4. Performing the agri- When selecting the cultural-purpose jobs working motion speed, it is necessary to fol- low the agrotechnical requirements for per-...
  • Page 148 Aggregation MTZ series 900 10.1. MOTION ON PUBLIC ROADS AND TRANSPORTATION WORKS Actually for the half of the time of its operation, the tractor is used for transporting pur- pose with driving to public roads. Therefore, the transport MTA’s are subject to exclusive safety standards.
  • Page 149 Aggregation MTZ series 900 3) Using the working lights is not allowed because it causes the dazzling of other traffic participants; 4) The motion of the tractor aggregated with agricultural machines with the vessels filled (process material – fertilizers, seeds, etc.) on public roads is prohibited.
  • Page 150 Aggregation MTZ series 900 this purpose in accordance with the recommendations.  Observe the allowable values of the vertical static loads on the axles, tyres, total op- erating weight and dimensions in the transport position!  Check the condition of the transport equipment of the machines (lighting set, warning and safety devises).
  • Page 151 Aggregation MTZ series 900  Prior to aggregating the machines by means of the three-point mounted attachment as well as prior to disconnecting the machines from the three-point mounted attachment, the control of the above attachment should be set to the position excluding the unintended lifting or lowering of the aggregate! ...
  • Page 152 Aggregation MTZ series 900 of rotation of the power takeoff and cardan shaft!  Disengage at all times the power takeoff when beginning driving on a step slope as well as in cases where its operation is unnecessary!  After disengaging the power takeoff, the hazard due to the inertial mass remains for some time.
  • Page 153 Aggregation MTZ series 900 10.8. Tyres, braking system  Caution! Do not forget that the pneumatic systems of the tractor and aggregated ma- chines contain high pressure.  Each time prior to departure check the intactness and operability of the brakes! ...
  • Page 154 Aggregation MTZ series 900 the vertical static loads on the axles, tyres, traction hitch mechanism and mounted attach- ment of the tractor obtained from the results of weighing, calculations and ballasting ex- ceeds the allowable values specified in the Operating Manual for the tractor.

  • Page 155: Adjustments

    Adjustments MTZ series 900 ADJUSTMENTS HPS with a cylinder in steering trape- zium The optimal front wheel track necessary for majority of agricultural works (1550 mm for front wheels and 1600 mm for rear wheels) has been set at the factory.
  • Page 156 Adjustments MTZ series 900 Adjusting the front wheel track of the tractors with the FDA (MTZ 920/920.2/920.3/952/952.2/952.3) I. FDA with bevel gear speed reduc- ers; HPS with the cylinder in the steer- ing trapezium The track width of the tractor with the FDA can be adjusted (for the tyres of the basic scope of delivery of 13.6-20) within...
  • Page 157 Adjustments MTZ series 900 7. Detach the hydraulic cylinder (2) from the holder (1). 8. Move the wheel reducing gear hous- ing by rotating the left adjusting screw using a wrench to obtain the required distance “A”. At the same...
  • Page 158 Adjustments MTZ series 900 II. FDA with planetary reducing gears; HPS with the cylinder in the steering trapezium Front wheel tractor track is adjusted within the range 1420 to 1970 mm by transposi- tion of the wheels and mutual positioning of the wheel disks and rims.
  • Page 159 Adjustments MTZ series 900 III. FDA with bevel reducing gears. Steering booster without the cylinder in the steering trapezium (if installed) The front wheel track is adjusted step- lessly by means of a screw mechanism located on the front axle cantilevers with- in the three intervals: 1350-1500 mm, 1500-1600 mm, 1600-1800 mm.
  • Page 160 Adjustments MTZ series 900 Adjusting the front wheel toe-in (trac- tors with the HPS) FDA with bevel reducing gears Having changed front wheel track width, adjust the toe-in by altering steering rod length. 1. Inflate the tyres to the required pres- sure.
  • Page 161 Adjustments MTZ series 900 Adjusting the rear wheel track 1. Jack-lift the tractor rear part to sepa- rate the wheels from the ground. 2. Unscrew the wheel fastening nuts (1) and remove the wheels. 3. Loosen the four bolts (2) of the rear wheel hubs by 3…5 turns.
  • Page 162 Adjustments MTZ series 900 Adjusting the power takeoff shaft External readjustment of PTO brake bands During operation adjust PTO brake bands, if: 1. PTO slips. 2. When being repositioned, the PTO control lever rests against the front or rear part of the control panel slot.
  • Page 163 Adjustments MTZ series 900 Adjusting the control when repairing the PTO Put the eccentric shaft (15) to the right- most position (flat is on the right vertical- ly) and lock it with a bar (16) and bolt (17). 1. Put the arm (9) to the “Neutral” posi-...
  • Page 164 Adjustments MTZ series 900 Adjusting control rod of FDA drive transfer box To adjust the rod, proceed as follows: • Put the lever (7) to position “PTO forc- edly ON” (upper fixed position, catch ball (5) is in the lower indent “A” of the rod (4)).
  • Page 165 Adjustments MTZ series 900 Adjusting the control of the power (position) governor 1. To adjust the control rod of the gov- ernor, proceed as follows: Adjust the length of the rod (1) by means of the nuts (2) in such a way that a clear-...
  • Page 166 Adjustments MTZ series 900 2. To adjust the position rod, proceed as b) Remove the central rod (10) of the follows: mounted attachment and set the pin (11) of the central rod to the upper hole of the a) Set the switch (1) to the middle posi- shackle (9);...
  • Page 167 Adjustments MTZ series 900 the slot in the nut is aligned with the cutter pin hole and fix it by means of the cotter pin. 4. The power rod shall be adjusted after adjustment of the power sensor: а) Set the switch (1) to the middle position (see Fig.
  • Page 168 Adjustments MTZ series 900 Clutch adjustments 1. General A dry single-plate spring-loaded clutch is mounted on the engine flywheel (1) (see Fig. а). The driving part of the clutch consists of the flywheel (1) and pressure plate (3). The driven part of the clutch includes the...
  • Page 169 Adjustments MTZ series 900 2. Procedure of removing the clutch from the engine: 1. Turn three auxiliary bolts (М12х40) into the pressure plate (3) through the auxiliary holes of the backing plate (6). 2. Turn out the nuts fastening the...

  • Page 170: Maintenance

    Maintenance MTZ series 900 MAINTENANCE KINDS OF MAINTENANCE OF THE TRACTORS Kind of maintenance Frequency or term of maintenance organization in tractor operation hours Maintenance during the tractor pre-operation: Maintenance during the tractor preparation for run- Prior to running-in preparation...
  • Page 171 • Change oil in the engine crankcase, air cleaner tray, casings of power train, FDA and intermediate support; • Grease the clutch shifter bearing; • Service the dry-type air cleaner (MTZ- 900.3/920.3/950.3/952.3); • Replace the basis filtering element of filter (MTZ- 900.3/920.3/950.3/952.3);...
  • Page 172 Maintenance MTZ series 900 SCHEDULED MAINTENANCE TABLE Replace- Adjust- Lubrica- Check Flushing Remarks Subject of maintenance Cleaning place- Drain tion ment ment Shift-time maintenance (STM) after each 10 hours of operation Oil in the engine Cooling fluid Oil in the hydraulic system tank...
  • Page 173 Backlash of steering wheel Brakes (service parking) Check the tightening of the bolts of the clamps of the CAC ducts (MTZ- 900.3/920.3/950.3/ 952.3) Pneumatic system PTO control nit Front wheels (toe-in) Front axle steering knuck- les (MTZ- 900/900.3/950/950.3)
  • Page 174 Maintenance MTZ series 900 End of the Table Subject of maintenance Check Cleaning Lubrication Replacement Adjustment Drain Flushing Remarks Maintenance after each 2000 hours of operation Front wheel bearings (MTZ- 900/900.3/950/950.3) 43 Steering rod joints Angle brace of the mounted at-...
  • Page 175 Maintenance MTZ series 900 Shift-time maintenance (STM) af- ter each 10 hours of operation or daily Action 1. Oil level in the diesel engine crankcase Stop the engine, wait for 15 minutes and check the oil level. The oil level shall be between the upper and lower marks of the probe (3).
  • Page 176 Maintenance MTZ series 900 Action 3. Checking the oil level in the hydraulic system tank NOTE: Prior to checking the oil level, place the tractor on a flat horizontal ar- ea. Shut down the engine and engage the parking brake.
  • Page 177 Maintenance MTZ series 900 Action 4b . Checking the fastening of the air-conditioner hoses The air-conditioner shall be fixed reliably by means of the binding screw clamp. The contact of the hoses with the tractor’s moving parts is not allowed.
  • Page 178 Maintenance MTZ series 900 Maintenance No. 1 (M-1) after each 125 hours of operation Perform the previous actions plus as fol- lows : Action 5. Oil level and condition in the engine air cleaner tray (except for MTZ-900.3/920.3/950.3/952.3) Loosen the two nuts (1) and remove the tray (2) of the air cleaner (3).
  • Page 179 Maintenance MTZ series 900 • Check the presence of clogging the fil- servicing, protect the filtering element tering element (RFE) without removing it against mechanical damages and oiling. from the casing. When the filtering element is oiled or clogged so that the blowing with com-...
  • Page 180 Maintenance MTZ series 900 Action 5а. Checking/adjustment of the tension of the air-conditioner com- pressor driving belt The tension of the air-conditioner compressor driving belt (1) is considered to be normal, if deflection of its section “engine crankshaft pulley – compressor pulley”...
  • Page 181 Maintenance MTZ series 900 Action 8. Checking the tension of the belt for driving the engine cooling system fan Check the belt for the presence of the traces of wear or damage. If necessary, replace it . To check the tension of the belt of the...
  • Page 182 Maintenance MTZ series 900 Action 11. Cleaning the filter of the cab heating and ventilation system • Lift the cab roof (1). • Unscrew the two fastening bolts and remove the filter cover (2) together with two filtering elements (3).
  • Page 183 Maintenance MTZ series 900 Action 13. Storage batteries WARNING: Batteries contain sulphuric acid, which causes severe burns when getting onto open parts of the body. Be- ware of the acid getting onto the skin, into eyes and onto clothes. When the acid gets onto external body parts, wash them with plenty of pure water.
  • Page 184 Maintenance MTZ series 900 Action 14. Checking the oil level in the intermediate support of the FDA car- dan drive Check the oil level in the intermediate support. If necessary, add oil to the level of the lower edge of the filler opening closed with plug (1).
  • Page 185 “Litol-24” using a gun by making 4…6 injections. Action 18 . Checking the backlashes in the steering rod joints (MTZ- 920/920.2/920.3/952/952.2/952.3) When the engine is running, turn the steering wheel to both sides to check free wheeling and backslash in the joints (1) of the steering rod (4).
  • Page 186 Maintenance MTZ series 900 Action 19 . Adjusting the free travel of the clutch pedal IMPORTANT! Too long pedal travel will not allow to the clutch to be fully disen- gaged and will make the gear switching difficult. Absence of free pedal travel will...
  • Page 187 Maintenance MTZ series 900 Action 19а. Replacing the basis filtering el- ement of engine oil filter (MTZ-900.3/920.3/950.3/952.3) After each 250 hours of operation, replace the paper filtering element (simultaneously with re- placement of oil in the engine crankcase). To do this, proceed as follows: unscrew the prefabricated filter from the con- ...
  • Page 188 Maintenance MTZ series 900 Maintenance No. 2 (M-2) after each 500 hours of operation Perform the actions of the previous maintenance plus the followings: Action 20. Centrifugal oil filter of the engine (except MTZ- 900.3/920.3/950.3/952.3) • Turn out the nut (1) and remove the cap (2).
  • Page 189 Maintenance MTZ series 900 Action 21 . Changing the oil in the en- gine • Warm up the diesel engine to normal operating temperature (at least 70°C). • Place the tractor on a flat area, stop the engine and apply the parking brake.
  • Page 190 Maintenance MTZ series 900 Action 22. Checking the clearances be- tween the valves and the rockers NOTE: check the clearances on the cold engine, having verified preliminary the tightening of the cylinder head bolts. To perform the adjustment, proceed as follows: •...
  • Page 191 Maintenance MTZ series 900 Action 23. Steering wheel play When engine is working, the steering wheel play shall not exceed 25. If no so, check and eliminate the plays in the joints of the hydraulic cylinders and steering rod. Action 24. Adjusting the service and parking brakes.
  • Page 192 Maintenance MTZ series 900 To adjust the parking brake, place the tractor on the flat area, stop the engine, lock the front wheels from the front and behind, and proceed as follows: a) Push the parking brake control lever (1) to the front position (from your- self);...
  • Page 193 Maintenance MTZ series 900 Checking and adjusting the pneumat- nect the rod (1) from the lug (9), re- ic system brake valve and its actua- move the boot (8), unscrew the lug tor. by 2-3 turns and adjust the air pres- The pneumatic actuator of the trailer sure to minimum 7.7 kgf/cm...
  • Page 194 Maintenance MTZ series 900 two-line pneumatic actuator brake valve away and send it for repair. (MTZ-900.3/920.3/950.3/952.3) Attach a pressure gauge with the scale IMPORTANT! When the brake valve of at least 10 kgf/cm to the connection actuator and the valve are adjusted...
  • Page 195 Maintenance MTZ series 900 Checking and adjusting the pneumat- ic system pressure regulator After 1000 hours of operation of the tractor (M-3), in case of malfunction of the pressure regulator, as well as after its disassembly for washing or replace-...
  • Page 196 Maintenance MTZ series 900 Action 25. Checking the tightness of the bolts of clamps of the CAC ducts (MTZ-900.3/920.3/950.3/ 952.3) Check, and, tighten, if necessary, the bolts of clamps of the CAC ducts. The tightening torque of the bolts of clamps of the CAC ducts shall be from 10 to 15 Nm.
  • Page 197 Maintenance MTZ series 900 Action 30. Steering knuckles of the front axle (MTZ-900/900.3/950/950.3) Using a gun, make 10-12 injections of lubricating grease through the pressure lubricators (one per each knuckle). Action 31. Checking the air-tightness of the air cleaner and inlet duct joints (except for MTZ- 900.3/920.3/950.3/952.3)
  • Page 198 Maintenance MTZ series 900 Action 32. Replacing the oil filter of the hydraulic system NOTE: Make further replacements of the oil filter of the hydraulic system after each 1000 hours of operation. • Remove the bolts (2) and cover (1) and extract the filtering element as- sembly using the arrester (4).
  • Page 199 Maintenance MTZ series 900 Action 34. Draining the deposit from the fuel fine filter Remove the drain plug (1) and drain de- posit until clean fuel free of water and dirt appears traces appear. Tighten the plug. If necessary, bleed the fuel sys- tem.
  • Page 200 Maintenance MTZ series 900 Action 35a. Checking the oil level in the casings of the “wet”-type brakes To check the oil level in the casings of the “wet”-type brakes, proceed as fol- lows: Place the tractor on a flat level area;...
  • Page 201 Maintenance MTZ series 900 II. FDA with planetary reducing gears (MTZ-920.2/920.3/952.2/952.3) Check the oil level: • In the wheel reducing gears (left and right). If necessary add oil to the level of check filler opening closed with plug (1). • In the FDA main gear. If necessary add oil to the level of check filler open- ing closed with plug (2).
  • Page 202 Maintenance MTZ series 900 Maintenance No.3 (M-3) after each 1000 hours of operation Perform all actions of the previous M plus the followings: Action 38. Torque of tightening of the engine head bolts NOTE! This operation shall be only per- formed on the warmed up engine.
  • Page 203 Maintenance MTZ series 900 Action 40. Replacing the filtering ele- ment of the fuel fine filter  Remove the plug (1) and drain the deposit.  Unscrew four nuts and remove the cover (3).  Draw out the filtering element (2).
  • Page 204 Maintenance MTZ series 900 Action 41. Alternator Take the driving belt (1) from the al- ternator pulley (2). Check the easy rotation of the alternator rotor and presence of plays in the bear- ings. If there are any plays or jamming of the rotor, remove the alternator and send it to the shop for repair.
  • Page 205 Maintenance MTZ series 900 Action 43. Steering rod joints (MTZ- 900/900.3/950/950.3) When the engine is running, turn the steering wheel in both direction to verify the free travel and plays in the joints (1) of steering rod (4). If there are any plays in the joints, pro- ceed as follows: •...
  • Page 206 “С”. When doing this, the hydraulic cylinders shall be with plungers indrawn. Action 47а. Changing oil of the HPS (MTZ- 900.3/920.3/950.3/952.3) • Follow the recommendations given for the above action. To get access to the HPS tank, lift the engine facing upwards to the stop and fix it safely in the lifted position.
  • Page 207 Maintenance MTZ series 900 Action 48. Changing oil in the trans- mission • Prior to changing oil, warm up the transmis- sion. • Place the tractor on the flat area, lower the mounted machine and stop the engine. • Engage the parking brake and lock the...
  • Page 208 Maintenance MTZ series 900 Action 49. Changing oil in the FDA cas- ings and intermediate support I. FDA with bevel reducing gears (MTZ 920/952) • Prior to changing oil, warm up oil in the FDA casings. • Place the tractor on a flat horizontal area.
  • Page 209 Maintenance MTZ series 900 II. FDA with planetary reducing gears (MTZ-920.2/920.3/952.2/952.3) • Let the tractor run for some time and warm up oil in FDA casings. • Place the tractor on the horizontal ar- ea. Stop the engine. Apply the parking brake and lock the wheels with wedg- es from both sides.
  • Page 210 Maintenance MTZ series 900 Action 51. Washing the primary oil filter of the engine • Loosen four clamps of connector sleeves and remove the filter from oil line located in front of the engine oil ra- diator. IMPORTANT! Note the filter orientation in the oil line.
  • Page 211 Maintenance MTZ series 900 Special maintenance After each 2000 hours of opera- tion Action 53. Checking the diesel engine injectors IMPORTANT! The injectors shall be cleaned and adjusted in a dealer’s special- ized workshop. WARNING: Diesel fuel is injected under...
  • Page 212 Д-245.5 diesel engines (MTZ- 950.3/952.3) and Д-245.43 S2 (MTZ- 900.3/920.3), setup advance angle of injec- tion shall be within 3.5°…4.5° before the TDC. IMPORTANT! Adjustment of the fuel equipment by the tractor operator (own- er) is the ground for rendering the manu- facturer’s warranties void.
  • Page 213 Maintenance MTZ series 900 Action 57. Starter of the engine  Unscrew the screws (1) and remove the cover (2).  Check the condition of the commutator (3), brushes (5) and springs (4).  Make sure of free brush movement. The brush pressure on the commutator surface shall be within 0.75-1.00 kgf.
  • Page 214 Maintenance MTZ series 900 Seasonal maintenance Combine the seasonal maintenance with the action under regularly scheduled mainte- nance Work content When transferring to the spring and summer When transferring to the autumn and winter period (at constant mean daily temperature period (at constant mean daily temperature above +5°C)
  • Page 215 Maintenance MTZ series 900 system radiator plug. Tractor maintenance under special operation conditions Under mountainous operating condi- tions, adjust the fuel pump to reduce its When operating the tractor under special output capacity to avoid disturbance of conditions (low temperatures, in the de-...

  • Page 216: Lubrication Table

    Standard ГОСТ 1642-75 or machinery oil И-12А State Standard ГОСТ 20799-75. At the tempera- ture of up to –55°C, dilute up to 15% of the refilling volume with winter diesel fuel . ** The refill capacities are given in parentheses for the FDA with planetary reducing gears (MTZ- 920.2/920.3/952.2/952.3)
  • Page 217 Maintenance MTZ series 900 Units and points of lubri- Standard name, brand and description of the lubricating materials and liquids Amount of cation Lubricant at operation temperature Refill at opera- Greasing at lubricating points tion, l storing (up to From -40C to From +5C to +50C...
  • Page 218 Casing of the FDA with bevel reducing gears Casing of the FDA with planetary reducing gears Casing of reducing gear with bevel transmission (each) Casing of planetary reducing gear (each) Oil tank of hydraulic and HPS (except for MTZ-900.3/920.3/950.3/952.3) 25.0 Fuel tanks (2 tanks/1 tank) 130/140 Casing of FDA cardan drive intermediate support 0.15...

  • Page 219: Troubleshooting

    Troubleshooting MTZ series 900 TROUBLESHOOTING TROUBLE, EXTERNAL MANIFESTATION REMEDY ENGINE The engine fails to start Air in the fuel system. Pump the system with manual priming pump. If neces- sary, eliminate air inflow. Faulty fuel pump. Take fuel pump away and send it to the shop for repair.
  • Page 220 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY Oil pressure in heated engine is below the allowable level Pressure sensor or indicator is faulty. Replace them by new ones. Engine lubrication system pump is faulty. Eliminate the failure or replace the pump.
  • Page 221 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY REAR PTO Rear PTO does not transfer full torsion torque(slips) Maladjustment of the control mechanism due to con- Adjust the PTO control mechanism. siderable wear of the friction linings of the brake band or owing to other reason.
  • Page 222 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY Non-conformance of the direction of the guide wheel turn to that of the steering wheel rot a- tion Wrong connection of the cylinder outlets of the meter- Change the connection ing pump to turning cylinder.
  • Page 223 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY The governor handle fails to return by its own from the “lifting” position to the “transport neutral” Jamming in the joints of the control handle with the Eliminate the jamming, clean the surfaces of the ar- power governor ticulated joints from the corrosion traces;...
  • Page 224 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY The pump is not unloaded over the whole range of travel of the mounted attachment with load when employing the position method of adjustment on reaching the specified position by the mounted attachment...
  • Page 225 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY CAB HEATING AND VENTILATION UNIT Warm air does not enter the cab The valve is shut off – open it. Hoses are clogged – No water circulation through the heating unit. clean them. Air or ice blockage in the heater hoses –...
  • Page 226 Troubleshooting MTZ series 900 TROUBLE, EXTERNAL MANIFESTATION REMEDY Trailer brakes operate inefficiently or are released slowly Maladjustment of the brake valve actuator. Adjust. Maladjustment of the brake valve. Remove and send it to the shop. Trailer brake system has failed.

  • Page 227: Tractor Transportation And Towing

    Operating Instructions MTZ series 900 TRANSPORTATION AND TOWING OF THE TRACTOR The tractors shall be transported by rail- The ropes should be fastened at the front way transport, on trucks and their trailers axle beam or eye-nut (1) and at the half-...

  • Page 228: Tractor Storage

    Section Х. Storage of the tractor MTZ 1221/1221В/1221.2/1221В.2/1221.3/1221В.3 Х228 STORAGE OF THE TRACTOR Prior to putting the tractor for a long-term • Loosen the tension of the generator storage, perform the following operations: and fan belts. • Clean the tractor.

  • Page 229: Appendix А. Electric Equipment

    Appendix MTZ series 900 APPENDIX А. ELECTRIC EQUIPMENT List of the components of the electric connection diagram of the tractor Designation Description Designation Description Alternator 14 V,1150 W Stereo cassette radio GB1,GB2 Storage battery 12 V, 88 A-h. Glow plugs...
  • Page 230 Appendix MTZ series 900 Continuation of the Table Designation Description Q-ty Road train sign switch SA2, Working lights switch SA3,SA11 Fan switch Windscreen wiper switch Starter switch with the start interlocking Combined switch Battery disconnect switch Windscreen washer switch SA10...
  • Page 231 Appendix MTZ series 900 Electric connection diagram of the tractor...
  • Page 232 Appendix MTZ series 900 Variants of electric equipment of the tractors...
  • Page 233 Appendix MTZ series 900 Connection diagram of the clearance lamps, number plate lights and instruments...
  • Page 234 Appendix MTZ series 900 LOWER BEAM UPPER BEAM RELAY RELAY Connection diagram of the road headlights...
  • Page 235 Appendix MTZ series 900 Connection diagram of the front and rear working lights and cab lighting lamp...
  • Page 236 Appendix MTZ series 900 Connection diagram of the wind- and rear screen wipers and windscreen washer...
  • Page 237 Appendix MTZ series 900 Diagram of connection of the parking brake and of the DL and PTO systems...
  • Page 238 Appendix MTZ series 900 Connection diagram of the road train sign lights and radio equipment...
  • Page 239 Appendix MTZ series 900 HEATER INTERLOCK RELAY Connection diagram of the cab heater and fan with the fan motor power of 90 W...
  • Page 240 Appendix MTZ series 900 HEATER INTERLOCK RELAY Connection diagram of the cab heater and fan with the fan motor power of 120 W...
  • Page 241 Appendix MTZ series 900 TURN INDICATORS FLASHER POWER SUPPLY RELAY Diagram of the turn indicators and fault signalling...
  • Page 242 Appendix MTZ series 900...
  • Page 243 Appendix MTZ series 900 Diagram of the instrumentation dashboard 80-3805010-Д1...
  • Page 244 Appendix MTZ series 900 Diagram of the instrumentation dashboard 826-3805010...
  • Page 245 1. Power supply system indicated the electromotive force of the storage battery and degree of its charge: The MTZ tractors are equipped with the 12.7 V: 100% of charge; following power supply systems: 12 V: 50% of the charge and less.
  • Page 246 Appendix MTZ series «900» Fig. 1. Checking the controllable voltage value: 1 1.1. Troubleshooting of the power – alternator G1; 2 – voltage indicator. supply system A. No voltage in the on-board power • Check the reliability of the contacts in...
  • Page 247 Appendix MTZ series «900»...
  • Page 248 Appendix MTZ series «900» 2. Engine starting system The engine starting system circuitry has the following differences depending on the supply voltage of the starter: А. Starter МЗ with the rated voltage of 12 V (Fig.3): • The power supply of 12 V is applied to the starter from the two interconnected batteries “GB1”...
  • Page 249 Appendix MTZ series «900»...
  • Page 250 Appendix MTZ series «900»...
  • Page 251 Appendix MTZ series 900 2.1. Troubleshooting in the starting system А. Too low starting rotational speed of the starter МЗ: a) Eliminate the possible loosening of the fastening or oxidization of the power system circuit: • on the storage batteries;...
  • Page 252 Appendix MTZ series 900 C. The starter cannot be switched on: а) Check the operability of the starter • check one wire of the test lamp to the ground and another wire in turn: 1) to the power terminal of the starter (Fig.
  • Page 253 Appendix MTZ series 900 Note: The test lamp shall be energized from the power terminal of the starter. D. Check the condition of the starting control circuits and instruments: a) Remove the side pieces of the dashboard; b) Check the operability of the...
  • Page 254 Appendix MTZ series 900 the relay terminals: • "Б" or "30" – wire О; • "К" or "85" – wire K having turned the key to the “II” position. In both cases, the test lamp shall be lit. d) check the integrity of the circuit...
  • Page 255 Appendix MTZ series 900 E. Check the integrity of the circuits and units of the starter interlock system with the gearbox engaged as well as of the automatic disconnection of the starter after starting the engine: a) check the integrity of the circuit from the interlock relay (K6) to the switch SA11 on the gearbox casing.
  • Page 256 Appendix MTZ series 900 d) Check the operability of the interlock relay (K2) (Fig. 13): • connect the test lamp between the relay terminal "30" (wire С) and battery terminal "+". The lamp shall be lit, when the gearbox lever is set to the neutral position.
  • Page 257 Appendix MTZ series 900 2.2. Electric torch pre-heater (ETPH). After starting the engine, the starter and relay are de-energized automatically. The The ETPH control system (А2) has the additional resistor in connected into the following peculiarities (see Fig. 3): electric-torch pre-heater coil again to 1.
  • Page 258 Appendix MTZ series 900 3. When turning the key of the starter switch (SA6) to the “І” position, the current from the storage battery is passed through KТ1 and K1 to the plugs А2. The pilot lamp is lit steadily and, after expiration of...
  • Page 259 Appendix MTZ series 900 Checking the operability of the glow plugs (Fig. 15) If there are difficulties with starting the engine in the winter period of operation: There can be two types of faults in the glow plugs: internal short circuit causing the fuse to blow out, or open circuit.
  • Page 260 Appendix MTZ series 900 • fuse (10) protects the circuit to the right 3. Lighting and light signalling system The protection of the system circuitry by road headlight; • fuse (9) protects the circuit to the left road means of the fuses has the following peculiarities: headlight.
  • Page 261 Appendix MTZ series 900 b) Upper beam of the road headlights. The 3.1. Clearance light, road and working arm of the steering-wheel-mounted switch lights is in the bottom fixed position: the supplying voltage is applied through the relay (K6) The clearance and road light as well as the (wire Р) to the fuse (6) (15 А) (wire Ф) and...
  • Page 262 Appendix MTZ series 900 Adjusting the road headlights The headlights should be adjusted as follows: • Mark out the screen as shown in Fig. 16. When doing this, mark the line of the centres of the headlights А-А on the screen at the distance equal to the height of location of the –...
  • Page 263 Appendix MTZ series 900 3.2. Turn indicators The voltage is supplied from the box (F1) through (SA6) to the power supply relay (K2) (terminal “85”) and further through the The blinking mode of lighting of the terminal “87а” to the fuse (12) of the box signalling lamps (СЛ) of the turn...
  • Page 264 Appendix MTZ series 900 3.3. Fault signalling 3.4. Signalling of braking the tractor The tractors are provided with emergency The stop light is switched on by the switch light signalling which makes it possible to (SB2) located on the bracket to the right switch on the front and rear turn indicators under the cab floor.
  • Page 265 Appendix MTZ series 900 3.5. Signalling of application of the On applying the parking brake, the rod of parking brake the switch (SB3) is released and its contacts are closed. The terminal "+" of The signalling of application of the parking...
  • Page 266 Appendix MTZ series 900 4. Cab heating and ventilation system The electric circuitry of the system has the following peculiarities:  The winding of the heater interlock relay K3 serving for preventing the discharge of the storage battery when switching on the heater with the engine not running is connected between the terminal “Д”...
  • Page 267 Appendix MTZ series 900 4.1. Diagnostics and troubleshooting In case of failure in the operation of the electric part of the heating and ventilation system, the search of the faults shall be performed in the following sequence: • Start the engine;...
  • Page 268 5.1. Front windscreen wiper • Position II: the second speed: the contacts L-H (wires Г-К) are closed. The MTZ tractors are equipped with a The second row of the contacts of the single-brush windscreen wiper with the switch (SA5) jointly with the end switch...
  • Page 269 Appendix MTZ series 900 The diagnostics and troubleshooting shall be performed in the following sequence: 5.2. Rear screen wiper 5.3. Windscreen washer The electric windscreen flusher (М4) with The electrical single-brush, single-lever external position of the electric pump. The and single speed rear screen wiper has...

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