EN
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
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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 |
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Every week |
Every month |
Every two month |
Every Quarter |
Every Year |
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Air- conditioning Unit Compressor |
Coolant volume |
Check coolant level |
+ |
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Coolant leakage |
Check leakage with halogen checker |
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+ |
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Check cracks and damage |
|
|
+ |
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Hose and pipe |
Check leakage of connectors and tightening of clamps |
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– |
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Replace desiccant and filter |
|
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– |
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Coolant |
Refill with specified coolant |
+ |
|
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Oil seal |
Check leakage trace with white paper |
+ |
|
– |
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Belt |
Check tightness of belt pulley and check wear |
|
|
+ |
|
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Bolt |
Check tightness，check and check change all of them, if necessary |
+ |
|
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Evaporator condenser Electrical Apparatus Element |
Evaporator Cartridge |
Check dirt, clean, if necessary |
+ |
|
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Wind motor |
Check running condition |
+ |
|
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Expansion valve |
Check running condition,remove filter gauze and clean |
|
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+ |
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Condenser Cartridge |
Check dirt, clean, if necessary |
+ |
|
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Wind motor |
Check running condition |
+ |
|
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Connector and Plug |
Check looseness of wire clamp plug |
+ |
+ |
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Heat Sensitive Resistance Switch |
Check action |
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|
+ |
|
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Magnetic Clutch |
Check if specified requirements has been met |
|
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|
+ |
|
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Magnetic Clutch bearing |
If it cannot turn steadily,please replace it |
|
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|
+ |
|
|
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 |
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|
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 instructions |
First-time |
Routine |
1st-Grade |
2st-Grade |
3st-Grade |
4st-Grade |
|
Check the wiper |
· |
• |
• |
• |
• |
• |
|
Re-tighten locking handle on drive`s cover |
• |
|
|
• |
• |
• |
|
Re-tighten engine radiator`s cover |
• |
|
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Check oil level of cab tipping hand pump |
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|
• |
• |
• |
|
Check lifting cylinder |
• |
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• |
• |
• |
Chassis of Maintenance Instructions
|
Chassis Maintenance instructions |
First-time |
Routine |
1st-Grade |
2st-Grade |
3st-Grade |
4st-Grade |
|
Check fixation and action of towing hook |
• |
|
• |
• |
• |
• |
|
Re-tighten the bolts on cross member of the frame |
• |
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Tighten front and rear leaf spring bolts and brackets |
• |
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• |
• |
• |
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Check spare tire fixing device |
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• |
• |
• |
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Check and adjust slide rail clearance of leaf spring |
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• |
• |
• |
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Check the fixation of wheel nuts |
• |
|
• |
• |
• |
• |
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Check the fixation of battery |
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• |
• |
• |
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Check the fixation of fuel tank |
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• |
• |
• |
Electrical system of Maintenance Instructions
|
Electrical system Maintenance instructions |
First-time |
Routine |
1st-Grade |
2st-Grade |
3st-Grade |
4st-Grade |
|
Check the working condition of electrical system（Instrument, lamp, wiper and air conditioner） |
• |
• |
• |
• |
• |
• |
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Check electrolyte level and cell voltage |
• |
|
• |
• |
• |
• |
|
Check the fixation of battery terminal, |
• |
|
• |
• |
• |
• |
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Check electric tachometer and speed accuracy |
• |
• |
• |
• |
• |
• |
Brake system of Maintenance Instructions
|
Brake system Maintenance instructions |
First-time |
Routine |
1st-Grade |
2st-Grade |
3st-Grade |
4st-Grade |
|
Drain water from air reservoir |
• |
• |
• |
• |
• |
• |
|
Check leafproofness of air pressure system（With barometer） |
• |
|
• |
• |
• |
• |
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Check brake lining thickness and adjust brake clearance |
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• |
• |
• |
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Check wheel brake |
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• |
• |
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Check vulnerability of brake pipeline and hoses |
• |
|
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• |
• |
• |
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Check brake chamber |
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• |
• |
• |
• |
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Check footbrake, handbrake and exhaust brake action（when do the trial running） |
• |
|
• |
• |
• |
• |
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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 |
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Replace fuel filter or filter element |
• |
When changing diesel oil |
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Check and adjust valve clearance |
• |
|
• |
• |
• |
• |
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Replace fuel filter element |
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|
• |
• |
• |
• |
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Clean fuel pre-filter or replace filter element |
|
|
• |
• |
• |
• |
|
Check coolant volume and add it to full |
• |
• |
• |
• |
• |
• |
|
Replace coolant |
According to 4.4 |
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Fasten cooling pipe clamp |
• |
|
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Fasten inlet air pipe, soft tube, and flange connection parts |
• |
|
• |
• |
• |
• |
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Check air filter maintenance indicating light or indicator |
|
|
• |
• |
• |
• |
|
Clean dust cup of air filter（Excluding automatic exhausting type） |
|
• |
• |
• |
• |
• |
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Clean main filter element of air filter |
When indicator light or indicates red |
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Replace safety filter core of air filter |
After cleaning main filter core for give times |
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Check bearing clearance of turbocharger |
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|
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|
• |
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Check，adjust clutch stroke and wire rope conditions |
• |
• |
• |
• |
• |
• |
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Electric components and electronically controlled system wiring harness |
Check it every 250hours |
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Note：The mark means that the maintenance is needed. |
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Vehicle of Maintenance Instructions
|
Vehicle Maintenance instructions |
First-time |
Routine |
1st-Grade |
2st-Grade |
3st-Grade |
4st-Grade |
|
Short distance trial running |
• |
|
• |
• |
• |
• |
|
Visual check for leakage |
• |
• |
• |
• |
• |
• |
|
Check and tighten cargo body |
• |
• |
• |
• |
• |
• |
Lubrication of Maintenance Instructions
|
Lubrication Maintenance instructions |
First-time |
Routine |
1st-Grade |
2st-Grade |
3st-Grade |
4st-Grade |
|
Water pump |
• |
• |
• |
• |
• |
• |
|
Clutch release shaft |
• |
• |
• |
• |
• |
• |
|
Clutch pedal shaft |
• |
• |
• |
• |
• |
• |
|
Check release bearing |
• |
• |
• |
• |
• |
• |
|
Universal joint and intermediate |
• |
• |
• |
• |
• |
• |
|
Steering knuckle and front axle |
• |
|
• |
• |
• |
• |
|
Leaf spring pin |
• |
|
At least once every four weeks |
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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 |
|
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Service Conditions Changing interval of Maintenance Instructions
|
Service Conditions |
WG I |
WG II |
WG III |
|
A |
——————- |
15000km |
20000km |
|
B |
5000km/4 months/service time 200h |
10000km/6 months/service time 500h |
———————- |
|
C |
5000km/4 months/service time 200h |
10000km |
15000km |
|
D |
5000km/4 months/service time 200h |
10000km |
15000km |
|
E |
5000km/4 months/service time 200h |
10000km |
15000km |
|
1. For vehicles services in various bad condition or always over-loads, interval of oil changing shall be shorten |
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