Maintenance Instructions For SINOTRUK in 2023
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Maintenance Instructions For SINOTRUK

truck of Maintenance Instructions

Everyone says it’s expensive to repair a car, but I don’t know that as long as you do these daily checks and maintenance on your vehicle, you can avoid many breakdowns and save “huge” repair bills.

Howo Maintenance Instructions

Assembly Petroleum Product Brand Volume
Fuel tank capacity(L) Diesel Diesel which apply to the local temperature 400 or 300
Engine Cooling system(L) Long-lasting antifreeze anti-corrosion coolant Heavy duty long-lasting antifreeze anti-corrosion coolant used in four seasons 40
Engine Lubrication system(L) Engine Oil CH-4 Grade 23
Transmission(L) Gear oil of heavy duty vehicles 85W/90 GL-5 13
Clutch(L) Brake fluid SAE 116/DOT3 About 1L
Steering(L) hydraulic liquid HVN32 Low temperature hydraulic liquid 3.5
Rear-axle final drive and bush bearing(L) Gear oil of heavy duty vehicles GL-5EP 80W/90 or GL-5EP 85W/140 23
Tilt-cab assembly hydraulic liquid HVN32 Low temperature hydraulic liquid 0.4
Item Content Check Period
Every week Every month Every two month Every Quarter Every Year
Air- conditioning Unit Compressor Coolant volume Check coolant level +
Coolant leakage Check leakage with halogen checker +
Check cracks and damage +
Hose and pipe Check leakage of connectors and tightening of clamps
Replace desiccant and filter
Coolant Refill with specified coolant +
Oil seal Check leakage trace with white paper +
Belt Check tightness of belt pulley and check wear +
Bolt Check tightness,check and check change all of them, if necessary +
Evaporator condenser Electrical Apparatus Element Evaporator Cartridge Check dirt, clean, if necessary +
Wind motor Check running condition +
Expansion valve Check running condition,remove filter gauze and clean +
Condenser Cartridge Check dirt, clean, if necessary +
Wind motor Check running condition +
Connector and Plug Check looseness of wire clamp plug + +
Heat Sensitive Resistance Switch Check action +
Magnetic Clutch Check if specified requirements has been met +
Magnetic Clutch bearing If it cannot turn steadily,please replace it +
WG I WG II WG III
Mileage per year less than 2x 10 ⁴ km of working duration not more than 600h. Mileage per year less than 2x 10 ⁴ km and less than 6x 10 ⁴km Mileage per year mire than 6x 10 ⁴km
Normal condition Bad Condition
A B C D E
Good condition and long distance transport, sulfer content of fuel is less than 0.05% Short distance transport, engineering truck, bus, etc. Off-road, mountain and rugged road Hot or cold region(temperature always above 30℃ or below -10°C) Sulfer content of fuel more than 0.05%
Service Condition Item WG I WGII WGIII
First-time Check After running1000~1500km After running 30~50h After running1500~2000km After running1500~2000km
Routine Check(P) Every 5000km Every 150h Every 1x 10 ⁴km Every 1.5x 10 ⁴km
1st-Grade Service (WD1) Every 1x 10 ⁴km Every 300h Every 2x 10 ⁴km Every 3x 10 ⁴km
2st-Grade Service (WD2) Every 2x 10 ⁴km Every 300h Every 4x 10 ⁴km Every 6x 10 ⁴km
1st-Grade Service (WD3) Every 4x 10 ⁴km Every 300h Every 8x 10 ⁴km Every 12x 10 ⁴km
4st-Grade Service (WD4) Every 8x 10 ⁴km Every 300h Every 16x 10 ⁴km Every 24x 10 ⁴km

Cab of Maintenance Instructions

Cab Maintenance instructionsFirst-time
Check
Routine
Check
1st-Grade
Service
2st-Grade
Service
3st-Grade
Service
4st-Grade
Service
Check the wiper·
Re-tighten locking handle on drive`s cover  
Re-tighten engine radiator`s cover     
Check oil level of cab tipping hand pump   
Check lifting cylinder  

Chassis of Maintenance Instructions

Chassis Maintenance instructionsFirst-time
Check
Routine
Check
1st-Grade
Service
2st-Grade
Service
3st-Grade
Service
4st-Grade
Service
Check fixation and action of towing hook 
Re-tighten the bolts on cross member of the frame     
Tighten front and rear leaf spring bolts and brackets  
Check spare tire fixing device   
Check and adjust slide rail clearance of leaf spring   
Check the fixation of wheel nuts 
Check the fixation of battery   
Check the fixation of fuel tank   

Electrical system of Maintenance Instructions

Electrical system Maintenance instructionsFirst-time
Check
Routine
Check
1st-Grade
Service
2st-Grade
Service
3st-Grade
Service
4st-Grade
Service
Check the working condition of electrical system(Instrument, lamp, wiper and air conditioner)
Check electrolyte level and cell voltage 
Check the fixation of battery terminal,
Coat electrode with grease
 
Check electric tachometer and speed accuracy

Brake system of Maintenance Instructions

Brake system Maintenance instructionsFirst-time
Check
Routine
Check
1st-Grade
Service
2st-Grade
Service
3st-Grade
Service
4st-Grade
Service
Drain water from air reservoir
Check leafproofness of air pressure system(With barometer) 
Check brake lining thickness and adjust brake clearance   
Check wheel brake    
Check vulnerability of brake pipeline and hoses  
Check brake chamber  
Check footbrake, handbrake and exhaust brake action(when do the trial running) 
Check ABS 

Diesel Engine of Maintenance Instructions

Diesel Engine Maintenance Item First-time Check P WD1 WD2 WD3 WD4
Replace diesel oil CH-4 Oil changing cycle as per different conditions
Replace fuel filter or filter element When changing diesel oil
Check and adjust valve clearance
Replace fuel filter element
Clean fuel pre-filter or replace filter element
Check coolant volume and add it to full
Replace coolant According to 4.4
Fasten cooling pipe clamp
Fasten inlet air pipe, soft tube, and flange connection parts
Check air filter maintenance indicating light or indicator
Clean dust cup of air filter(Excluding automatic exhausting type)
Clean main filter element of air filter When indicator light or indicates red
Replace safety filter core of air filter After cleaning main filter core for give times
Check bearing clearance of turbocharger
Check,adjust clutch stroke and wire rope conditions
Electric components and electronically controlled system wiring harness Check it every 250hours
Note:The mark means that the maintenance is needed.

Vehicle of Maintenance Instructions

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aintenance instructions-for-sinotruk
Vehicle Maintenance instructionsFirst-time
Check
Routine
Check
1st-Grade
Service
2st-Grade
Service
3st-Grade
Service
4st-Grade
Service
Short distance trial running
(Including braking test)
 
Visual check for leakage
Check and tighten cargo body

Lubrication of Maintenance Instructions

Lubrication Maintenance instructionsFirst-time
Check
Routine
Check
1st-Grade
Service
2st-Grade
Service
3st-Grade
Service
4st-Grade
Service
Water pump
Clutch release shaft
Clutch pedal shaft
Check release bearing
Universal joint and intermediate
Support of transmission shaft
Steering knuckle and front axle 
Leaf spring pin At least once every four weeks
Check leaf spring slide rail clearance of suspension
Shock absorber mounting
Gearshift lever bracket 
Brake camshaft and brake arm
Towing hook
Fifth wheel
Cab door hinge  
Perform rust-proofing treatment of driver`s cab again according to schedule  Once every 12 months 

Service Conditions Changing interval of Maintenance Instructions

 Service Conditions
Changing interval
WG IWG IIWG III
A——————-15000km20000km
B5000km/4 months/service time 200h10000km/6 months/service time 500h———————-
C5000km/4 months/service time 200h10000km15000km
D5000km/4 months/service time 200h10000km15000km
E5000km/4 months/service time 200h10000km15000km
1. For vehicles services in various bad condition or always over-loads, interval of oil changing shall be shorten
2. Ensure two times of oil changing in whatever conditions
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