Paccar MX-11 Operator's Manual
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Paccar MX-11 Operator's Manual

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Summary of Contents for Paccar MX-11

  • Page 1 Operator s Manual ’ Operator’s Manual 2021 Emissions 2021 Model Year Warranty...
  • Page 3 Contents Engine Operation........Engine Maintenance........Engine Warranty........
  • Page 5 The information contained in this manual is proprietary to PACCAR. Reproduction, in whole or in part, by any means is strictly prohibited without prior written authorization from PACCAR Inc.
  • Page 6 ENGINE OPERATION - Chapter 1 | ENGINE OPERATION Safety - Introduction..........................5 Emergency - What To Do If......................... 10 Operating Instructions......................... 13 Y53-1166-1M1 (10/2020)
  • Page 7 ENGINE OPERATION - Safety - Introduction Finally, you’ll find a helpful Subject Index. erence and remain with this truck It’s in the back of the manual and Safety - Introduction when sold. alphabetically lists the subjects covered. All information contained in this manual is Your vehicle may not have all the features Using this Manual based on the latest production information...
  • Page 8 Failure this manual are based on information in to comply may result in death, person- effect at the time of printing. PACCAR al injury, equipment or property dam- reserves the right to make changes at any age.
  • Page 9 ENGINE OPERATION - Safety - Introduction General Safety Instructions are included in the procedures when they apply. NOTE Keep in mind that even a well maintained WARNING vehicle must be operated within the range Warranty information including the of its mechanical capabilities and the limits EPA and California Emission Warranty Improper practices, carelessness, or of its load ratings.
  • Page 10 ENGINE OPERATION - Safety - Introduction long hair. Remove all jewelry when the environment, liquid refrigerant off if any steam or coolant begins to working. systems must be properly emptied escape. Failure to comply may result and filled using equipment that •...
  • Page 11 The catalyst substrate located in service work. Use only genuine or battery charging cables to any the Diesel Particulate Filter (DPF) replacement parts from PACCAR. ignition or governor control wiring. contains vanadium pentoxide, • Always use the same fastener part...
  • Page 12 ENGINE OPERATION - Emergency - What To Do If skin with soap and water. In case PACCAR engine dealers and The stop engine warning lamp will of harmful contact, immediately Independent Service Providers illuminate, and an audible tone will sound, contact a physician.
  • Page 13 Add oil if necessary. If the problem persists, contact an authorized • If the oil pressure fails to rise within PACCAR engine dealer as soon as 10 seconds after the engine starts, possible. stop the engine and determine the cause.
  • Page 14 ENGINE OPERATION - Emergency - What To Do If fluid (DEF) is required. Another function of the check engine lamp is to warn the NOTE NOTE operator of an impending idle shutdown. When the idle shutdown timer is 30 The system may also temporarily over- The instrument cluster gauges may seconds from expiring, the ECM begins heat during severe operating condi-...
  • Page 15 ENGINE OPERATION - Operating Instructions This allows the engine to cool or if you see any steam or coolant es- WARNING gradually and uniformly. caping. Always remove the cap very slowly and carefully. Be ready to back If overheating came from severe To reduce the chance of personal in- off if any steam or coolant begins to operating conditions, the...
  • Page 16 ENGINE OPERATION - Operating Instructions Engine, Check Engine WARNING CAUTION If the Stop Engine warning lamp illumi- The installation of electronic devices to nates, it means you have a serious en- the On Board Diagnostics (OBD) con- gine system problem. This should be nector, the vehicle Controller Area Net- considered an emergency.
  • Page 17 ENGINE OPERATION - Operating Instructions (HEST), Diesel Particulate Filter (DPF) and tank. If this happens, draining the fuel tank High Exhaust System Temperature Diesel Exhaust Fluid (DEF) warning lamps. may become necessary. This procedure (HEST) Warning Lamp can be avoided if the operator or technician drains the water from the fuel filter module NOTE frequently at the primary fuel filter.
  • Page 18 An engine compression brake is standard to the skin. exhaust brake is switched "OFF" when on the MX-11 engines. Optionally, this driving bobtail or with an unloaded engine may be equipped with an exhaust Diesel Exhaust Fluid (DEF) Lamp trailer.
  • Page 19 ENGINE OPERATION - Operating Instructions The brake switch is located on the could cause severe damage to the en- accessory dash panel. It controls whether WARNING gine. Idle the engine four minutes at the brake is ON (ready to slow the vehicle approximately 1,000 rpm to warm the down) or OFF (no braking action).
  • Page 20 ENGINE OPERATION - Operating Instructions This switch allows you to choose brake, the engine compression brake will progressively stronger braking to slow the engage to maintain the cruise set speed. CAUTION vehicle down. Engine Compression Brake on\off Engine compression brake controls Operating the engine with a compres- include: sion brake that will not automatically...
  • Page 21 ENGINE OPERATION - Operating Instructions make a full sweep when ignition key is Generic gauges. Your gauges may differ. cycled ON to indicate that the gauge is NOTE operating correctly. If the engine is running, increase en- gine speed (rpm) or operate the vehi- cle until the low oil pressure warning lamp turns off.
  • Page 22 ENGINE OPERATION - Operating Instructions Engine Operation Symbols NOTE IT IS THE RESPONSIBILITY OF THE OWNER AND OPERATOR TO OPER- ATE THE VEHICLE IN A SAFE ENVI- High exhaust system temperature (HEST); RONMENT. amber in color. Combustible Vapors Normal Starting Procedure Follow this engine starting procedure when WARNING Check engine lamp;...
  • Page 23 ENGINE OPERATION - Operating Instructions With the accelerator pedal in the allow the oil pressure to stabilize. Also, for source be applied directly or indirectly idle position, turn the ignition key to coolant temperatures below 150°F (70°C), to the lubricating oil pan. the START position to start the use a low gear and drive at moderate engine.
  • Page 24 NOTE PACCAR engines are designed to operate An idle shutdown feature (available on at full throttle under momentary conditions PACCAR engines) can be program- If your truck is equipped with a manual down to peak torque engine speed.
  • Page 25 ENGINE OPERATION - Operating Instructions Engine Shutdown Long periods of idle-time (3 hours or more) on or off, to remove these hydrocarbon may accelerate the build-up of soot in the deposits and moisture. The engine speed diesel particulate filter (DPF), especially in will remain elevated for 20-60 minutes.
  • Page 26 Under antenna further away. the wheels to skid on a slippery sur- these conditions, PACCAR is not liable for Check with the accessory supplier face. You could lose control of the ve- any performance problems with either the...
  • Page 27 ENGINE OPERATION - Operating Instructions Remove Foot from Accelerator the three-position selector switch in the "HI" position. WARNING Operating on Grades and Dry DO NOT operate the engine compres- Pavement sion brake or exhaust brake when driv- ing/operating your vehicle bobtail or WARNING with a loaded or unloaded trailer on road surfaces with poor traction (wet,...
  • Page 28 ENGINE OPERATION - Operating Instructions "Control speed" is the speed at which the personal injury, equipment or property driving bobtail or with an unloaded forces pushing a vehicle down a grade are damage. trailer. Failure to comply may result in equal to the forces holding it back.
  • Page 29 ENGINE OPERATION - Operating Instructions Slow Down Around Curves Braking Truck on Grade NOTE After you have determined what the safe speed is for your vehicle, operate the engine compression brake or ex- haust brake with the transmission in the lowest gear that will not cause the engine speed to exceed the rated en- gine speed.
  • Page 30 ENGINE OPERATION - Operating Instructions Tips for Operation on Slick Roads may result in an accident involving NOTE death or personal injury. WARNING When driving on slick roads, start with the The longer or steeper the hill, the more To reduce the possibility of personal “ON/OFF”...
  • Page 31 ENGINE OPERATION - Operating Instructions vehicle has lost traction or if there is a fishtailing motion, switch the “ON/OFF” switch to the “OFF” position. DO NOT attempt to use the engine compression brake or exhaust brake in the “HI” position. Y53-1166-1M1 (10/2020)

  • Page 32: Table Of Contents

    ENGINE MAINTENANCE - Chapter 2 | ENGINE MAINTENANCE Maintenance Requirements........................ 32 Preventative Maintenance Schedule Intervals..................34 Normal Duty/Line Haul........................34 Severe Duty/Vocational........................44 Pick-up/Delivery/Refuse........................49 Engine Specifications..........................54 Engine Lubricating Oil Recommendations and Specifications............56 Engine Oil Capacities and Pressures....................57 Engine Lubrication and Filter Intervals....................57 Cooling System Maintenance......................
  • Page 33 ENGINE MAINTENANCE - Maintenance Procedures........................66 Engine Identification..........................97 Y53-1166-1M1 (10/2020)

  • Page 34: Chapter 2 | Engine Maintenance

    PACCAR Inc, refer to the component the cab. Entry of carbon monoxide into manufacturer's maintenance the cab is also possible from other ve- recommendations.
  • Page 35 ENGINE MAINTENANCE - Maintenance Requirements Inspect clearance to other Adding or using 100% antifreeze in a components. cooling system may result in cooling CAUTION system plugging and overheating Check air restriction gauge. problems. Aftertreatment Exhaust Piping Do not direct high pressure water onto This procedure should be followed as part This procedure should be followed as part seals or flexible hoses.

  • Page 36: Preventative Maintenance Schedule Intervals

    ENGINE MAINTENANCE - Preventative Maintenance Schedule Intervals Check for any signs of fluid leaks. will need to adjust mileage, kilometer, NOTE Ensure all access caps/covers are hour, or time interval based on the En- installed and tight. gine Lubrication and Filter Intervals. The pressure cap (on the rear-top of the surge tank) should NEVER be re- Bi-weekly Maintenance Check...
  • Page 37 ENGINE MAINTENANCE - Normal Duty/Line Haul Less than 20% Idle Time - 37,000 mi / 60,000 km / 1,125 hrs / 6 mo Air system and compressor • Refer to Air Compressor on page 93 for maintenance instructions. • Refer to Engine Air Filters on page 93 for maintenance instructions.
  • Page 38 ENGINE MAINTENANCE - Normal Duty/Line Haul Less than 20% Idle Time - 75,000 mi / 120,000 km / 2,250 hrs / 12 mo (1 yr) Drive Belts • Refer to Engine Belt Checks on page 88 for maintenance instructions. • Refer to Fan Belt Tensioner (If So Equipped) on page 88 for maintenance instructions.
  • Page 39 ENGINE MAINTENANCE - Normal Duty/Line Haul Less than 20% Idle Time - 150,000 mi / 240,000 km / 4,500 hrs / 24 mo (2 yrs) Mounting Bolts • Refer to Engine Mounting Bolts on page 96 for maintenance instructions. Less than 20% Idle Time - 300,000 mi / 480,000 km / 6,750 hrs / 36 mo (3 yrs) Less than 20% Idle Time - 300,000 mi / 480,000 km / 6,750 hrs / 36 mo (3 yrs)
  • Page 40 ENGINE MAINTENANCE - Normal Duty/Line Haul Less than 20% Idle Time - 375,000 mi / 600,000 km / 8,450 hrs / 48 mo (4 yrs) Open Crankcase Ventilation • Replace filter and O-Ring gaskets when the OCV is serviced.. Less than 20% Idle Time - 450,000 mi / 725,000 km / 13,500 hrs / 48 mo (4 yrs) Less than 20% Idle Time - 450,000 mi / 725,000 km / 13,500 hrs / 48 mo (4 yrs)
  • Page 41 ENGINE MAINTENANCE - Normal Duty/Line Haul Less than 20% Idle Time - 600,000 mi / 965,000 km / 18,000 hrs / 72 mo (6 yrs) Aftertreatment System • Refer to Diesel Particulate Filter (DPF) Service Strategy on page 91 - Wet Cleaning Strategy for maintenance instructions. Less than 20% Idle Time - 750,000 mi / 1,200,000 km / 24,000 hrs / 96 mo (8 yrs)
  • Page 42 ENGINE MAINTENANCE - Normal Duty/Line Haul Greater than 20% Idle Time - 25,000 mi / 40,000 km / 750 hrs / 6 mo Air System & Compressor • Refer to Air Compressor on page 93 for maintenance instructions. • Refer to Engine Air Filters on page 93 for maintenance instructions.
  • Page 43 ENGINE MAINTENANCE - Normal Duty/Line Haul Greater than 20% Idle Time - 50,000 mi / 80,000 km / 1,500 hrs / 12 mo (1 yr) Drive Belts • Refer to Engine Belt Checks on page 88 for maintenance instructions. • Refer to Fan Belt Tensioner (If So Equipped) on page 88 for maintenance instructions.
  • Page 44 ENGINE MAINTENANCE - Normal Duty/Line Haul Greater than 20% Idle Time - 150,000 mi / 240,000 km / 4,500 hrs / 24 mo (2 yrs) Mounting Bolts • Refer to Engine Mounting Bolts on page 96 for maintenance instructions. Greater than 20% Idle Time - 300,000 mi / 480,000 km / 6,750 hrs / 36 mo (3 yrs) Greater than 20% Idle Time - 300,000 mi / 480,000 km / 6,750 hrs / 36 mo (3 yrs)
  • Page 45 ENGINE MAINTENANCE - Normal Duty/Line Haul Greater than 20% Idle Time - 350,000 mi / 560,000 km / 7,850 hrs / 48 mo (4 yrs) Open Crankcase Ventilation • Replace filter and o-ring gaskets when the OCV is serviced. Greater than 20% Idle Time - 450,000 mi / 725,000 km / 13,500 hrs / 48 mo (4 yrs) Greater than 20% Idle Time - 450,000 mi / 725,000 km / 13,500 hrs / 48 mo (4 yrs)

  • Page 46: Severe Duty/Vocational

    ENGINE MAINTENANCE - Severe Duty/Vocational Greater than 20% Idle Time - 600,000 mi / 965,000 km / 18,000 hrs / 72 mo (6 yrs) Aftertreatment System • Refer to Diesel Particulate Filter (DPF) Service Strategy on page 91 - Wet Cleaning Strategy for maintenance instructions. Greater than 20% Idle Time - 750,000 mi / 1,200,000 km / 24,000 hrs / 96 mo (8 yrs)
  • Page 47 ENGINE MAINTENANCE - Severe Duty/Vocational Severe Duty/Vocational - 15,000 mi / 24,000 km / 400 hrs / 6 mo Air system and compressor • Refer to Air Compressor on page 93 for maintenance instructions. • Refer to Engine Air Filters on page 93 for maintenance instructions.
  • Page 48 ENGINE MAINTENANCE - Severe Duty/Vocational Severe Duty/Vocational - 30,000 mi / 48,000 km / 800 hrs / 12 mo (1 yr) Drive Belts • Refer to Engine Belt Checks on page 88 for maintenance instructions. • Refer to Fan Belt Tensioner (If So Equipped) on page 88 for maintenance instructions.
  • Page 49 ENGINE MAINTENANCE - Severe Duty/Vocational Severe Duty/Vocational - 60,000 mi / 96,000 km / 1,600 hrs / 24 mo (2 yrs) Mounting Bolts • Refer to Engine Mounting Bolts on page 96 for maintenance instructions. Severe Duty/Vocational - 150,000 mi / 240,000 km / 4,500 hrs / 24 mo (2 yrs) Severe Duty/Vocational - 150,000 mi / 240,000 km / 4,500 hrs / 24 mo (2 yrs) Aftertreatment System...
  • Page 50 ENGINE MAINTENANCE - Severe Duty/Vocational Severe Duty/Vocational - 180,000 mi / 290,000 km / 5,400 hrs / 36 mo (3 yrs) Open Crankcase Ventilation • Replace filter and o-ring gaskets when the OCV is serviced.. Severe Duty/Vocational - 300,000 mi / 480,000 km / 9,000 hrs / 36 mo (3 yrs) Severe Duty/Vocational - 300,000 mi / 480,000 km / 9,000 hrs / 36 mo (3 yrs) Aftertreatment System...

  • Page 51: Pick-Up/Delivery/Refuse

    ENGINE MAINTENANCE - Pick-up/Delivery/Refuse Severe Duty/Vocational - 450,000 mi / 725,000 km / 13,500 hrs / 48 mo (4 yrs) Drive Belts • Refer to Poly V-belt and Fan Drive Belt Removal on page 89 - Replace for maintenance instructions. Severe Duty/Vocational - 750,000 mi / 1,200,000 km / 24,000 hrs / 96 (8 yrs)
  • Page 52 ENGINE MAINTENANCE - Pick-up/Delivery/Refuse Pick-up/Delivery/Refuse - 15,000 mi / 24,000 km / 400 hrs / 6 mo Air system and compressor • Refer to Air Compressor on page 93 for maintenance instructions. • Refer to Engine Air Filters on page 93 for maintenance instructions. Charge Air System •...
  • Page 53 ENGINE MAINTENANCE - Pick-up/Delivery/Refuse Pick-up/Delivery/Refuse - 30,000 mi / 48,000 km / 800 hrs / 12 mo (1yr) Charging / Cranking System • Refer to Batteries, Cables, and Connections on page 96 for maintenance instructions. Drive Belts • Refer to Engine Belt Checks on page 88 for maintenance instructions.
  • Page 54 ENGINE MAINTENANCE - Pick-up/Delivery/Refuse Pick-up/Delivery/Refuse - 60,000 mi / 96,000 km / 1,600 hrs / 12 mo (1 yr) Cooling System • Refer to Radiator Hoses on page 84 for maintenance instructions. Crankshaft • Refer to Crankshaft - Vibration Damper on page 96 for maintenance instructions.
  • Page 55 ENGINE MAINTENANCE - Pick-up/Delivery/Refuse Pick-up/Delivery/Refuse - 125,000 mi / 200,000 km / 4,500 hrs / 24 mo (2 yrs) Open Crankcase Ventilation • Replace filter and o-ring gaskets when the OCV is serviced. Pick-up/Delivery/Refuse - 300,000 mi / 480,000 km / 9,000 hrs / 36 mo (3yrs) Pick-up/Delivery/Refuse - 300,000 mi / 480,000 km / 9,000 hrs / 36 mo (3yrs) Aftertreatment System...

  • Page 56: Engine Specifications

    Refer to Change Extended Life Coolant on page 63 for maintenance instructions. Engine Specifications PACCAR MX-11 Engine Specifications Horsepower See the EPA label on top of the valve cover or on the mixer manifold. Ensure that all maintenance intervals leading up to this point are repeated during this interval prior to the completion of those listed here.
  • Page 57 ENGINE MAINTENANCE - Engine Specifications Firing Order 1, 5, 3, 6, 2, 4 Crankshaft Rotation (viewed from front of engine) Clockwise Displacement 659 CID (10.8 liters) Bore and Stroke 4.84 in. (123 mm) × 5.97 in. (152 mm) Dry Weight (excludes flywheel and air compressor) 2,178 lb (988 kg) Approximately 550-650 rpm Idle Speed...

  • Page 58: Engine Lubricating Oil Recommendations And Specifications

    New Engine Break-In Oils extend the oil and filter change interval engine durability and increases fuel beyond the manufacturers PACCAR does not approve the use of economy. recommendations may decrease engine special “break-in” engine lubricating oils for life due to factors such as corrosion, new or rebuilt PACCAR engines.

  • Page 59: Engine Oil Capacities And Pressures

    Aftermarket Oil Additive Usage These oils meet performance the engine. characteristics that conform to the lubricant PACCAR does not recommend the use of industry standards and are sufficient aftermarket oil additives. Today's high- Engine Oil Capacities and protection when used according to the...
  • Page 60 ENGINE MAINTENANCE - Engine Lubrication and Filter Intervals will decrease the engine life due to ponents. Follow the oil and filter CAUTION factors such as corrosion, deposits, change intervals as recommended in and wear. Engine oil filters capture dirt this section of the manual. Failure to and remove deposits from the oil to comply may result in equipment or Extending the oil and filter change in-...

  • Page 61: Cooling System Maintenance

    The cooling system in your vehicle was 40,000 mi (64,000 km) for line haul ap- factory filled with extended life coolant that plications; every 20,000 mi (32,000 meets or exceeds all ASTM D6210 and Caterpillar EC-1 requirements. PACCAR Y53-1166-1M1 (10/2020)
  • Page 62 North America. For extremely cold CAUTION operating conditions, a 60/40 mixture (coolant/water ratio) can be used to CAUTION Use of non-genuine PACCAR coolant provide freeze protection down to -62°F filters may cause severe engine dam- (-52.2°C). The engine cooling system has very age.
  • Page 63 ENGINE MAINTENANCE - Cooling System Maintenance Condition NOTE Perform a visual inspection of the coolant. CAUTION It should have no cloudiness or floating debris. Determine the chemical inhibitor Maximum recommended ELC concen- When adding coolant, avoid mixing dif- concentration level by using an extended tration is 60% ELC and 40% water by ferent brands and formulations.

  • Page 64: Engine Coolant Specifications

    Specifications damage. DO NOT use sealing addi- Use of non-genuine PACCAR coolant tives or soluble oils in the cooling sys- filters may cause severe engine dam- tem. The use of sealing additives can: age.

  • Page 65: Extended Life Coolant

    Coolant Suppliers hours of off-highway use) on initial fill with Extended Life Coolant no extender added. The change interval is Authorized PACCAR Engine dealer 1,000,000 miles (1,600,000 km)/20,000 Perform these maintenance procedures hours/8 years with an extender addition at according to the Preventative Maintenance 500,000 miles (800,000 km)/10,000 Schedule.
  • Page 66 CAUTION NOTE CAUTION DO NOT use high-sulfur diesel fuel as PACCAR recommends that the cetane Unapproved fuel can reduce economy it will damage the exhaust aftertreat- number of diesel fuel be a minimum of or possibly damage fuel system com- ment system.

  • Page 67: Warranty And The Use Of Renewable And Other Paraffinic Diesel Fuels

    PACCAR and therefore damage to the engine and exhaust system. meets ASTM Standard D6751 or will not be covered by the PACCAR engine The use of other grades of diesel fuels EN 14214 specifications. warranty. Specifically, raw or unprocessed other than ULSD fuel will be considered a •...

  • Page 68: Recommendations To Avoid Fuel Gelling

    To avoid fuel gelling in cold weather: workmanship by PACCAR and therefore shutting off engine. After the engine is shut will not be covered by the PACCAR engine • Use appropriate fuel grade/blend off it will take at least 15 minutes for all the warranty.
  • Page 69 ENGINE MAINTENANCE - Maintenance Procedures Oil Level Indication on Dipstick Twist the dipstick handle to unlock Topping Up the Engine Oil it, then pull the dipstick out of the holder. If checking the engine oil just after stopping NOTE the engine, wait 15 minutes for the oil to drain back into the oil pan before checking On the engine oil dipstick, the differ- the fluid level.
  • Page 70 ENGINE MAINTENANCE - Maintenance Procedures Oil Drain Plug for Composite Pan Reinstall the oil fill cap and twist to Oil Pan Drain Plug Installation lock it in place. Engine Oil Fill Location CAUTION The drain plug is on the bottom of the oil pan.
  • Page 71 Oil Filter Module and filter change intervals. Refer to the “Preventative Maintenance Schedule” for the recommended oil and filter change service interval. CAUTION Use of non-genuine PACCAR oil filters can cause severe engine damage. Oil Filter Removal Preparation Detent CAUTION NOTE...
  • Page 72 ENGINE MAINTENANCE - Maintenance Procedures a box wrench to avoid damaging may result in death, personal injury or the oil filter cap. WARNING equipment damage from electrical arc- Removing Oil Filter Cap ing or damage to electrical compo- Turn off the engine and place the igni- nents.
  • Page 73 ENGINE MAINTENANCE - Maintenance Procedures Turn the screw cap clockwise to Removing Centrifugal Oil Filter Removing Full-flow Oil Filter unlock the centrifuge base. Unlocking the Centrifuge Base WARNING Press the clips (1) and dismount Remove the O-rings from the the centrifugal oil filter element screw cap and centrifuge base.
  • Page 74 Oil Filter Installation Installing Full-flow Oil Filter Installing Centrifugal Oil Filter into Base NOTE If the PACCAR part you are installing includes instructions or drawings that appear to conflict with this manual, fol- low the instructions included with the part. The instructions found with your part supersede this manual.
  • Page 75 ENGINE MAINTENANCE - Maintenance Procedures After Replacing Engine Oil Filter(s) Turn the screw cap Installing O-rings onto Screw Cap and Insert into Base Follow the steps below after installing new counterclockwise to lock it. oil filters: Installing and Locking Cap Reconnect the chassis battery cable at the negative battery terminal.
  • Page 76 ENGINE MAINTENANCE - Maintenance Procedures Open Crankcase Ventilation (OCV) Disconnect the chassis battery cable at the negative battery CAUTION Module Maintenance terminal. This emissions related component Increasing the engine speed directly Place an oil collection pan directly separates oil from air coming from the after maintenance or repairs to the lu- under the OCV module.
  • Page 77 NOTE and outlet hose. OCV to gain access to the replaceable filter and gaskets. OCV - MX-11, Front Be careful when removing the OCV to Lay the OCV module on a clean prevent an oil spill. Oil may be present table with the engine interface in the OCV-to-engine interface.
  • Page 78 ENGINE MAINTENANCE - Maintenance Procedures DO NOT remove the retaining ring e-clip Remove the gasket from the motor from the shaft. The e-clip (1) being slanted as well as the gasket from the is OK (2). housing, and wipe the two gasket grooves with a clean, lint-free rag.
  • Page 79 Replace fuel filters with parts of the position. When reinstalling motor, Install the OCV module on the same part number. PACCAR periodi- ensure shaft and bottom bearing engine. Tighten and torque the six cally changes its filter design, and fil- are aligned (1).
  • Page 80 ENGINE MAINTENANCE - Maintenance Procedures Warranty and the Use of Biodiesel Primary filter housing (cap Fuel on page 65. installed) NOTE Secondary filter housing (cap Fuel Filter Removal (Primary and installed) Use of poor quality fuel may require Secondary) Priming pump handle more frequent fuel filter element serv- Complete the following steps to remove the ice.
  • Page 81 ENGINE MAINTENANCE - Maintenance Procedures Fuel Filter Module - Exploded Primary Filter Cap Secondary Filter Cap Primary Filter Secondary Filter Primary Filter Housing Secondary Filter Housing Manual Priming Pump Y53-1166-1M1 (10/2020)
  • Page 82 ENGINE MAINTENANCE - Maintenance Procedures Fuel Filter Installation (Primary and Clean the fuel filter cap and ing new filter installation. Failure to do Secondary) surrounding area with a clean rag so may cause damage to the engine Follow the steps below to install new to ensure dirt does not fall into the fuel system.
  • Page 83 Water Draining Proce- priming. dure. Reinstall the primary and Fuel Filter Module, Priming Pump - MX-11 secondary fuel filter caps (1) by rotating them clockwise until the O- NOTE Rings on the caps make contact with the housing.
  • Page 84 ENGINE MAINTENANCE - Maintenance Procedures Operate the priming pump by could take up to 15 seconds of The system is under high pressure moving the knob in and out for 150 cranking for the engine to start. If which, when relieved, could cause seconds.
  • Page 85 Handle coolant and antifreeze careful- test strips. make sure to flush the coolant system. ly. Ethylene glycol antifreeze is poison- Contact a PACCAR® Authorized Re- Keep the cooling system full by topping-up using ELC pre-diluted to Y53-1166-1M1 (10/2020)
  • Page 86 ENGINE MAINTENANCE - Maintenance Procedures a 50/50 blend, unless a different • Hose clamp torque Slowly loosen the radiator cap to ratio of water/antifreeze has been relieve any pressure in the cooling substituted (depending on system. Replace Coolant Filter operating conditions). Perform these maintenance procedures Close the coolant filter shutoff valve according to the Preventative Maintenance...
  • Page 87 ENGINE MAINTENANCE - Maintenance Procedures Remove the O-ring from the Apply a small amount of coolant to coolant filter housing, if it has not the sealing ring of the new coolant been removed already. filter. Install the filter, rotating it clockwise Coolant Filter Removal until the sealing ring makes contact with the filter housing.
  • Page 88 Run engine at higher idle until ant leakage, consult a PACCAR Serv- engine fan turns on and allow Replace the Fill Cap ice dealer. thermostat to open.
  • Page 89 ENGINE MAINTENANCE - Maintenance Procedures MX-11 Engine Accessory Drive Belts Accessory belt Fan belt (not present with crank mounted fan on T680MLU MX-11 and LHP MX-13) Water pump Tensioners Engine dampener A/C compressor Alternator Y53-1166-1M1 (10/2020)
  • Page 90 NOTE cannot be obtained, the fan spacer Follow these guidelines to check your or fan is incorrectly placed. engine fan: No fan belt with T680MLU MX-11 and • The leading edge of any fan blade LHP MX-13. • With the engine shut off, check the must be 1 in.
  • Page 91 NOTE Poly V-belt and Fan Drive Belt No fan belt with T680MLU MX-11 and Removal LHP MX-13. Perform these maintenance procedures according to the Preventative Maintenance Place the new poly V-belt over the Rotate the flex-bar as shown in the Schedule.
  • Page 92 ENGINE MAINTENANCE - Maintenance Procedures Poly V-belt, Alternator, Air- Flex Bar on Tensioner - Compressor and Coolant Pump Belt Conditioning Compressor Drive NOTE and Coolant Pump Drive Removal Follow the steps below to remove the poly When installing the belts DO NOT V-belt, alternator, air-conditioning wrap belt around the tensioner until af- compressor drive and coolant pump drive...
  • Page 93 PACCAR dealer. ter the belt has been wrapped around interval. Both strategies are shown on the Replace filter if necessary.
  • Page 94 ENGINE MAINTENANCE - Maintenance Procedures Diesel Exhaust Fluid (DEF) Filter only be purchased from PACCAR Perform these maintenance procedures Parts and are designated with a according to the Preventative Maintenance "PRX" suffix. See your authorized Schedule. PACCAR dealer. Medium and Large DEF Tank...
  • Page 95 ENGINE MAINTENANCE - Maintenance Procedures Charge Air Piping cracks in the tubing and elbows. Leaks in Perform these maintenance procedures the intake system allow abrasive dust to WARNING according to the Preventative Maintenance enter the engine and quickly cause Schedule. expensive damage.
  • Page 96 ENGINE MAINTENANCE - Maintenance Procedures on the air filter housing (an in-cab • Check hose/pipe condition – Inspect the sealing surfaces and restriction gauge is optional in some deterioration/signs of leaking clean out any debris from the models). Service the filter elements when inside of the filter enclosure before •...
  • Page 97 ENGINE MAINTENANCE - Maintenance Procedures As the filter plugs and restriction increases, Turbocharger this immediately. If you detect any a red indicator will appear in a window on deficiencies, take the vehicle to an the indicator. When red appears, the air authorized dealer for servicing.
  • Page 98 Please inquire with Perform these maintenance procedures Check for complete insertion of an authorized PACCAR dealer or serv- according to the Preventative Maintenance motor mount. Replace as ice provider about this procedure. Schedule.
  • Page 99 ENGINE MAINTENANCE - Engine Identification Engine Valve Adjust Intervals Vehicle Application Interval Normal Duty (Line Haul) - less than 20% Initial adjust at 150,000 mi (240,000 km, idle time 6,750 hours), at 450,000 mi (725,000 km, 13,500 hours), then every 300,000 mi Normal Duty (Line Haul) - more than 20% (480,000 km) thereafter idle time...
  • Page 100 ENGINE MAINTENANCE - Engine Identification Engine - Right Side Coolant filter Centrifugal bypass oil filter Full-flow oil filter Oil cooler Turbocharger Y53-1166-1M1 (10/2020)
  • Page 101 EPA Label top of the engine valve cover or on the not be changed unless approved by mixer manifold. The engine EPA label must PACCAR. The EPA label provides important facts about the engine. This label is located on Y53-1166-1M1 (10/2020)
  • Page 102 ENGINE MAINTENANCE - Engine Identification The EPA label provides many details regarding the engine. Some PACCAR MX EPA Label Location facts that are found on the EPA label include the following: • Fuel rate • Idle speed • Maximum rated speed •...
  • Page 103 ENGINE MAINTENANCE - Engine Identification Y53-1166-1M1 (10/2020)
  • Page 104 ENGINE WARRANTY - Chapter 3 | ENGINE WARRANTY United States and Canada Engine Warranty..................103 Y53-1166-1M1 (10/2020)
  • Page 105 This warranty applies to new PACCAR months, 500,000 miles (800,000 needed to repair the damage to the engine MX-11 engines sold and used in the United kilometers) or 12,500 hours, whichever resulting from a warrantable failure. occurs first, after the date of delivery of the...
  • Page 106 ENGINE WARRANTY - United States and Canada Engine Warranty in its sole discretion, PACCAR may pay communication expenses, meals, lodging the engine is brought into an authorized reasonable costs for a mechanic to travel and similar costs incurred as a result of a...
  • Page 107 EXPRESS OR IMPLIED. PACCAR AND This warranty applies to new PACCAR PACCAR is not responsible for damage or THE SELLING DEALER EXPRESSLY MX-11 engines sold and used in the United loss resulting from engine horsepower/ DISCLAIM ANY WARRANTY OF States or Canada and operated in fire torque upgrades.
  • Page 108 PACCAR PACCAR will pay for all parts and labor resulting from a warrantable failure. Operator’s Manual. The owner is also needed to repair the damage to the engine The owner is responsible for a $100 (U.S.
  • Page 109 Failures of belts and hoses supplied by WEAROUT OF COVERED PARTS. limited to: damage due to accident; PACCAR are covered for the first year from THIS WARRANTY AND THE EMISSION operation without adequate coolants or the date of delivery of the engine to the first WARRANTY SET FORTH HEREINAFTER lubricants;...
  • Page 110 PACCAR engine PROPERTY, ATTACHMENTS, TRAILERS of sale by PACCAR with all U.S. Federal dealer. Your vehicle contains air, fuel, and AND CARGO; LOSS OR DAMAGE TO emission regulations applicable at the time electrical components that may affect PERSONAL CONTENTS;...
  • Page 111 States and Canadian PACCAR engine exhaust fluid. Failure of replacement parts PACCAR AND THE SELLING DEALER dealers , or an authorized PACCAR engine used in repairs due to the above non- SHALL NOT BE LIABLE FOR facility where applicable, subject to warrantable conditions is not warrantable.
  • Page 112 Where a warrantable condition exists, the periods of time listed below provided PACCAR will repair your engine at no cost California Air Resource Board, 9528 there has been no abuse, neglect or to you including diagnosis, parts and labor.
  • Page 113 . PACCAR engine dealer . Your vehicle PACCAR approved rebuilt parts and contains air, fuel, and electrical assemblies. PACCAR will repair any of the Warranty Limitations components that may affect engine emission control parts found by PACCAR Your sole and exclusive remedy against emission controls.
  • Page 114 LOST PROFITS; ENGINE OR VEHICLE are not covered by this warranty. PACCAR maintenance item. PACCAR does not DOWNTIME; THIRD PARTY DAMAGE, is not responsible for failures or damage...
  • Page 115 ENGINE WARRANTY - United States and Canada Engine Warranty Y53-1166-1M1 (10/2020)
  • Page 116 Index Index Coolant Filter Installation Coolant Level Cooling Fan Accessory Drive Cooling System Additives to Cooling System Cooling system maintenance After Replacing Engine Oil Filter(s) Cooling System Overheating Aftertreatment Exhaust Piping Crank Mounted Fan Air Compressor Crankshaft - Vibration Damper Air filter housing Air Filter Restriction Indicator Air Intake Piping...
  • Page 117 Index Engine Lubrication and Filter Intervals Greater than 20% Idle Time - 25,000 mi / 40,000 km / 750 hrs / 6 mo Engine Maintenance Greater than 20% Idle Time - 300,000 mi / 480,000 km / 6,750 hrs / 36 mo (3 yrs) Engine Mounting Bolts Greater than 20% Idle Time - 350,000 mi / 560,000 km / 7,850 hrs / 48 mo (4 yrs) Engine Oil 56,...
  • Page 118 Index Poly V-belt, Alternator, Air-Conditioning Compressor Drive and Coolant Pump Drive Removal Preventative Maintenance Schedule Intervals Normal Duty/Line Haul Priming the Fuel System Normal Duty/Line Haul Maintenance Intervals Greater than 20% Idle Time Normal Duty/Line Haul Maintenance Intervals Less than 20% Idle Time Normal Starting Procedure Radiator Fill Procedure Radiator Hoses...
  • Page 119 Index Turbocharger ULSD Ultra Low Sulfur Diesel Under hood air filter housing 93, Valve Adjustment Interval Visual Inspection of Engine Warranty and the Use of Biodiesel Fuel Warranty and the Use of Renewable and Other Paraffinic Diesel Fuels WIF, Water-In-Fuel, Fuel Filter Module...
  • Page 121 WARNING Breathing diesel engine exhaust exposes you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. • Always start and operate the engine in a well-ventilated area. • If in an enclosed area, vent the exhaust to the outside. •...

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