Technical information

TROUBLE SHOOTING
EN / M-SC3.5 / May 2010 29
5.2.3 Other engine related problems
PROBLEM POSSIBLE CAUSE WHAT TO DO?
Diesel engine fails to crank, the
starter makes clicking noises,
or the engine cranks very slowly
• Almost certainly this is an electrical
problem. The remote control panel will
indicate a failure code related to the
DC voltage (see 5.1.2)
• One other possibility is that the engine
is locked by water in the cylinder or
there is other severe damage.
Check on water in the cylinder and further
damage by cranking while lifting the valves
with the decompression handle. When there is
water in the cylinder, then deactivate the
control system, disconnect the battery, remove
the glow plug. Crank the engine to remove the
water through the opening of the glow plug.
Check oil on the presence of water and
change oil. Find out how the water entered the
cylinder (check the air vent). Take precautions
to prevent it from happening again. When
there is no mechanical malfunction the
problem must be an electric malfunction..
• Starter battery switched "OFF". Check position of the battery switch and switch
"ON".
• Starter battery voltage insufficient
(battery too weak).
Check battery voltage. Recharge the battery.
Inspect battery terminals and cables for a good
electrical connection (inspect against
corrosion, tattered wires, etc.).
• Wiring control system faulty. 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.
• Starter broken. Repair the starter motor.
• To thick engine lubricating oil. Change oil for a lower viscosity.
Starter is turning engine
smoothly, but engine fails to
start
• Out of fuel or faulty fuel, water in the
fuel.
Fill up with fuel or replace with better quality.
• Fuel solenoid is not opening (no “click”
can be heard).
Check wire connections and circuitry to
solenoid. (Refer to DC wiring diagram).
• Fuel lift pump is not working.
• Fuel filter is blocked.
• Air in fuel lines.
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Bleed air from fuel system (refer to
maintenance section).
• Wrong valve clearance. Adjust valve clearance.
• Low compression because of dirty
valves.
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.
• Blocked injector. Have the injector tested and cleaned if
necessary.