Thomas PROTOUGH 900, Owner/Operator And Parts Manual

Page: 66 / 165

64
4. MAINTENANCE
4.13 TROUBLESHOOTING
4.13B Engine
Symptom Probable Cause Solution
Lack of power Faulty fuel pump Check and replace
Faulty injection system Check and repair
Incorrect valve timing Check and repair
Clogged air filter Check and replace
Air in fuel system Bleed fuel lines
Blocked fuel system Check and repair
Overheating Check cooling system
Engine temperature Check and replace
too low thermostat
Worn engine components Check, repair, replace
ie: rings, valves, cylinder
Black exhaust Clogged air filter Check and replace
Faulty injection system Check and repair
Incorrect valve timing Check and repair
Worn engine components Check, repair, replace
ie: rings, valves, cylinder
Blue / white exhaust Incorrect valve timing Check and repair
Worn engine components Check, repair, replace
ie: rings, valves, cylinder
Overheating Check cooling system
Incorrect grade of oil Drain and replace with
proper specification
Water in fuel Drain tank. Replace
filter
Engine starts then Faulty stop solenoid Check and replace
stops Clogged air filter Check and replace
Blocked fuel system Check and repair
Air in fuel system Bleed fuel lines