Trouble Shooting Table Engine - Whisper Power W-SQ6 User Manual

TROUBLE SHOOTING
5.2.2

Trouble shooting table engine

PROBLEM
Diesel engine fails to crank, the
starter makes clicking noises, or
the engine cranks very slowly
Starter is turning engine
smoothly, but engine fails to
start
Engine runs irregularly.
Engine speed drops
30
CAUSE
• Almost certainly this is an electrical
problem. Display will indicate "LOW
START BAT"
• Starter battery switched "OFF".
• Starter
battery voltage
(battery too weak).
• Faulty fuse on the control panel
• Wiring control system faulty
• Starter broken
• To thick engine lubricating oil.
• Out of fuel or faulty fuel, water in the
fuel.
• Fuel solenoid is not opening (no "click"
can be heard).
• Fuel lift pump is not working.
• Fuel filter is blocked.
• Air in fuel lines.
• Wrong valve clearance.
• Low compression because of dirty
valves.
• Blocked injector.
• Loss of compression by wear out or
damage
• Unsuitable contaminated fuel
• Lack of fuel.
• Choked fuel filter.
• Disturbances on the electrical system/
user side.
• Faulty fuel lift pump.
• Choked air filter.
• Lack of air.
• Choked exhaust system, exhaust
blocked,.
• Air in the fuel pipes
• Faulty electronic governor
• Blocked injector.
• Wrong valve clearance.
• Temporarily hunting (this will disappear when engine has run in).
• Ongoing hunting caused by faulty
electronic governor
• Faulty electronic governor
SOLUTION
The problem must be an electric malfunction.
Check position of the battery switch and switch
"ON".
Check battery voltage. Recharge the battery.
insufficient
Inspect battery terminals and cables for a good
electrical connection (inspect against corrosion,
tattered wires, etc.)
Replace fuse
During the normal starting process, the battery
voltage drops to 11V (with a fully charged
battery). If the voltage does not drop during
starting, the electrical connection is faulty. If the
battery voltage drops lower than 11V, then the
battery has been discharged too deep.
Repair the starter motor
Change oil for a lower viscosity.
Fill up with fuel or replace with better quality.
Check wire connections and circuitry to solenoid.
(Refer to DC wiring diagram)
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Bleed air from fuel system (refer to maintenance
section).
Adjust valve clearance,
Clean valves. Take off the injection bent and
inspect the outlet port. When little rust in the port
clean the valve by taking off the valve spring and
rotate until rust is removed. When the outlet port
is strongly affected by rust, the exhaust system is
not properly installed (refer to paragraph 5.4.3).
Contact Whisper Power service department for
advice.
Have the injector tested and cleaned if necessary.
Repair by Whisper Power service
Fill up with fuel or replace by better quality.
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Check if electrical load is fluctuating
Check and repair
Check the air intake
Check the exhaust piping; inspect manifold inside
Bleed air from fuel system (refer to maintenance
section).
Replace faulty parts.
Have the injector tested and cleaned if necessary.
Adjust valve clearance.
Replace faulty parts.
Replace faulty parts.
October 2008 / W-SQ6 for mobile applications / EN