Chapter 9 TROUBLESHOOTING
9-5
Engine Does Not Turn
Table 9-3 Engine does not turn
Problem Cause Remedy
A
Malfunction of
starting air sys-
tem.
a Malfunction of starting valve
Inspect starting valve, and repair or
replace.
b Starting air pressure lower than specified
Check air tank pressure, and increase
pressure if low.
B
Malfunction of
mechanical
engine parts
a Seizing of moving parts in engine
Disassemble and inspect pistons, con-
necting rods, crankshaft, camshaft, bush-
ings of timing gear and others, inlet and
exhaust valves, etc., and repair.
b Deviation of timing due to incorrect
engine assembly
Pistons are hitting valves
Disassemble and repair.
c Viscosity of engine oil too high, or clotted
oil
Change oil to one with lower viscosity.
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