Maintenance instructions

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NO.17668，PANWANG ROAD ZHANGQIU,
JINAN,SHANDONG,
P.R.CHINA

Maintenance instructions
Sinotruk Group Jinan Special Vehicle Co Ltd

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
Item		Content	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
1^st-Grade Service （WD1）	Every 1x 10 ⁴km Every 300h	Every 2x 10 ⁴km	Every 3x 10 ⁴km
2^st-Grade Service （WD2）	Every 2x 10 ⁴km Every 300h	Every 4x 10 ⁴km	Every 6x 10 ⁴km
1^st-Grade Service （WD3）	Every 4x 10 ⁴km Every 300h	Every 8x 10 ⁴km	Every 12x 10 ⁴km
4^st-Grade Service （WD4）	Every 8x 10 ⁴km Every 300h	Every 16x 10 ⁴km	Every 24x 10 ⁴km

Cab	First-time Check	Routine Check	1^st-Grade Service	2^st-Grade Service	3^st-Grade Service	4^st-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	First-time Check	Routine Check	1^st-Grade Service	2^st-Grade Service	3^st-Grade Service	4^st-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	First-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	First-time Check	Routine Check	1^st-Grade Service	2^st-Grade Service	3^st-Grade Service	4^st-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	•		•	•	•	•
Vehicle	First-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	First-time Check	Routine Check	1^st-Grade Service	2^st-Grade Service	3^st-Grade Service	4^st-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	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 2. Ensure two times of oil changing in whatever conditions

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.

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Maintenance instructions Sinotruk Group Jinan Special Vehicle Co Ltd

Maintenance instructions
Sinotruk Group Jinan Special Vehicle Co Ltd