Operation and Maintenance Manual of WP13C Series Diesel Engines
Weichai Power Pursuit of Excellence
- 15 -
Chapter
V
Troubleshooting
1. The engine fails in start
Reason
How to remove
1
Oil channels like inlet screen of delivery pump or hose
blocked
Check and remove the blockage
2
Air comes into fuel system
Release air, inspect the joint sealing and repair
3
Injection pump error
Examine the plug, oil outlet valve, repair or replace
the damaged parts
4
Injector error
Examine the atomization and repair
5
Wrong initial angle of air distribution or fuel supply
Inspect and adjust
6
High pressure fuel pipe damaged or leaks
Repair and replace
7
Cylinder insufficient pressure
Inspect the valve sealing, gasket and the piston ring, repair or
replace;
8
Low ambient temperature
Add low temperature start equipment
2. Stops soon after start
Reason
How to remove
1
Fuel filter blocked
Disassemble the filter and clean filter, or
replace the element if necessary
2
Air comes into the fuel system
Examine the joint and sealing of the fuel pipe, if the screw
is tightened and release the air
3
Fuel pump does not work
Examine the piston and valve of feul delivery pump, clean
or repair them
4
Poor quality fuel contains too much water
Clean the filter or change fuel
5
Low idle adjusting
Re-adjust
3. Insufficient power
Reason
How to remove
1
Air intake blocked (air filter blocked)
Inspect the air filter, intake pipe; clean or change the filter
2
High exhaust back pressure
Inspect the valve timing, if the exhaust pipe is
blocked;
3
Insufficient pressure of supercharging system
Inspect and remove leakage with pipes and joints
4
Abnormal working of supercharger
Inspect or change the assembly
4.1
Compressor and turbine channel are blocked
Clean or replace
4.2
Floating bearing fails
Replace
4.3
Carbon, dust or oil are accumulated at the
back of turbine and compressor
Wash
5
Intercooler damaged, blocked or leaks
Replace or repair
6
Fuel pipe leaks or blocked
Examine the pipe and joint sealing, filter, repair or remove th
blockage, replace the element
7
Poor fuel quality
Wash the fuel tank, filter assembly and pipe,
change the fuel
8
Injection pump or speed governor seriously worn
Repair or replace