WEICHAI WP13C450-18, Operation And Maintenance Manual

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Operation and Maintenance Manual of WP13C Series Diesel Engines
Weichai Power Pursuit of Excellence
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Reason How to remove
1 Poor quality fuel containing too much water Change the oil
2 . Low cooling water temperature
Inspect the working temperature of thermostat and replace
it in necessary
3 Wrong timing for air distribution and fuel supply Inspect and adjust it
4 Poor atomization of injector nozzle Adjust and repair it
5
Low compression pressure, incomplete burn and
the piston is stuck in the cylinder liner
Inspect the piston ring, liner, gasket and repair
6 Poor running-in between piston ring and liner Continue to running-in
7 Un-staggered piston ring openings Adjust and re-assemble
8 Piston ring fails Change
9 Large gap between piston and liner Repair or replace
10 Supercharger sealing ring worn Examine and replace
11 Supercharger thrust bearing worn Examine and replace
12 Supercharger oil return pipe blocked Wash or repair
7. Too much oil is collected in air intake port and pipe of supercharger
Reason How to remove
1 Supercharger sealing fails Repair or replace
2 Oil-gas separator fails Change
3 Oil pan high level or surplus oil Inspect and drain a proper amount of oil
8. Unstable speed
Reason How to remove
1 Poor quality fuel containing water and wax Washing fuel pipe and change the fuel
2 Air comes into fuel suction pipe Inspect the sealing of pipe and joint and release the air
3 Uneven oil supply Inspect and repair (by special workshop)
4 Uneven atomization of injector Inspect and repair
5
Superchargersurge
Inspect, wash the channel to remove dirt; Remove carbon
collected in the exhaust channel
6 Supercharger damaged Change
9. Low oil pressure
Reason How to remove
1
Oil pan low level or insufficient oil
Inspect the oil level and if there is any leakage; if so, add oi
2 Pressure adjusting valve of the main oil channel error Inspect the valve, wash and repair it
3
If the oil strainer, pipes, connector and
gaskets are blocked or damaged
Inspect the oil strainer and joint; if there is any shrinkage
porosity in the oil channel; if so, repair it
4
Unqualified oil brand or grade Change the oil with specified brand and grade
5 Inlet pipe of oil pump leaks Inspect the oil pipe and connector, repair or replace
6
High temperature of water in cooling system and inlet oi
Examine the cooling system and correct it
7 Oil inlet filter suffering great resistance Change the element