OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
May 2, 2013
Revision 2
Chapter 2-4
Page 11
Engine Controls (continued)
Trouble,
Symptom,
Condition
Probable Cause
Test, Check, and/or Remedy
3.
Engine will not
start. Cranking
speed is low.
a.
Low battery output
Check the battery and recharge or replace
b.
Loose starting circuit
connections or faulty cables
Check all connections and cables. Tighten or replace
as required.
c.
Improper lubricating oil
viscosity
Check the oil. Refer to Section 2-2.
Remove and replace the oil as necessary.
4.
Engine cranks
but will not
start.
Caution:
To
prevent damage to
the starting motor,
do not engage the
starting motor for
more than 30
seconds. Wait two
(2) minutes
between each
attempt to start.
a.
Low fuel
Make sure there is sufficient fuel in the fuel tank.
•
If engine will not start, the fuel pump may be
defective.
•
If engine starts and then stops after a short time,
check fuel lines, and filters
b.
Fuel shutoff valve closed
Open the shutoff valve on the fuel tank.
c.
Plugged or defective filter
Replace fuel filters. Also, check the gaskets for
leaking or damaged condition.
d.
Loose connections,
damaged hoses or fuel
lines between tank and fuel
pump
Tighten all fittings and connections. Replace any
damaged hoses or fuel links.
e.
Defective EIB board.
Replace the EIB board.
5.
Engine cranks,
but will not
start. Over-
temperature
indication
appears
immediately.
a.
Defective engine
temperature switch
Check wiring to engine high temperature switch (S49
on schematic), which is located on top of the engine
block. If wiring is correct, remove wires and check
resistance between terminals C and N.O. A
resistance of less than 10 ohms indicates a defective
switch. Replace switch if defective.
b.
Defective EIB board (A2)
Replace the EIB board.
6.
Engine is hard
to start.
Cranking speed
is normal and
the fuel supply
is adequate.
a.
Low compression, which
may be caused by sticking
or burned exhaust valves,
worn or broken
compression rings, leaking
cylinder head gasket, or
valve clearance adjustment.
Check the compression in accordance with
instructions in the engine manufacturer’s operation
manual. Overhaul the engine to make repairs as
necessary.
7.
Engine starts
but then stops
after a few
seconds by
automatic
shutdown.
a.
Low oil pressure or
defective oil pressure
switch.
Restart the engine and observe oil pressure gauge. If
oil pressure is 12 psi or more, disconnect wire from
the normally-closed switch terminal on the oil pressure
switch. Restart engine. If engine continues to run,
the oil pressure switch is defective. Replace oil
pressure switch. If engine stops, the EIB board might
be defective.
b.
Defective EIB board (A2)
Replace EIB board.
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