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.
| 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 |
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| Air- conditioning UnitCompressor |
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 |
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 |
| Cab Maintenance instructions | First-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 Maintenance instructions | First-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 Maintenance instructions | 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 Maintenance instructions | First-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 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 Maintenance instructions | 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 Maintenance instructions | First-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 |
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 |
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In commercial transport and logistics, true fleet profitability is measured by asset efficiency, not just gross engine power. Fuel burn rates, preventative maintenance schedules, unscheduled downtime, and daily load factors directly determine return on investment (ROI).
Every commercial fleet expansion or replacement represents a critical capital investment. Whether hauling aggregate across site corridors, delivering containerized freight from UAE ports, or managing inter-emirate distribution, your fleet’s mechanical reliability directly impacts your operational margins.
