Portable Compressor 7/20
14---2
SEPTEMBER 2003
14.2.
ENGINE TROUBLESHOOTING
Table 14---2.
ENGINE TROUBLESHOOTING
Fault
Cause
Remedy
Engine fails to start
Low battery charge
Bad earth connection
Loose connection
Fuel starvation
Relay failed
Engine control not in ”run” position
Check fan belt tension, battery and cable connections
Check the earth cables, clean as required
Locate and make the connection good
Check the fuel level and fuel system components. Replace the
fuel filter if necessary
Replace the relay
Check the speed cylinder and stop position
Engine starts but
stalls when the
switch returns to
position I
Electrical fault
Low engine oil pressure
Faulty relay
Faulty key---switch
Test the electrical circuits
Check the oil level and the oil filter(s)
Check the relays
Check the key---switch
Engine starts but
will not run or
engine shuts down
prematurely
Electrical fault
Low engine oil pressure
Safety shut---down system in operation
Fuel starvation
Switch failure
High compressor oil temperature
Water present in fuel system
Faulty relay
Test the electrical circuits
Check the oil level filter(s)
Check the safety shut---down switches
Check the fuel level and fuel system components. Replace the
fuel filter if necessary
Test the switches
Check the compressor oil level and oil cooler. Check the fan
drive
Check the water separator and clean if required
Check the relay in the holder and replace if necessary
Engine overheats
Reduced cooling air from fan
Check the fan and the drive belts
Check for any obstruction inside the cowl
Engine speed too
high
Incorrect throttle arm setting
Faulty regulator valve
Check the engine speed setting
Check the regulation system
Engine speed too
low
Incorrect throttle arm setting
Blocked fuel filter
Blocked air filter
Faulty regulator valve
Premature unloading
Drive belt too tight
Check the throttle setting
Check and replace if necessary
Check and replace the element if necessary
Check the regulation system
Check the regulation and the operation of the air cylinder
Check the drive belt tightening
Excessive vibration
Engine speed too low
See “Engine speed too low”
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