Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List page 111

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
Engine Controls (continued)
Trouble, Probable Cause
Symptom,
Condition
3. Engine will not a. Low battery output
start. Cranking
b. Loose starting circuit
speed is low.
c. Improper lubricating oil
4. Engine cranks a. Low fuel
but will not
start.
Caution: To
prevent damage to
b. Fuel shutoff valve closed
the starting motor,
c. Plugged or defective filter
do not engage the
starting motor for
more than 30
d. Loose connections,
seconds. Wait two
(2) minutes
between each
attempt to start.
e. Defective EIB board.
5. Engine cranks, a. Defective engine
but will not
start. Over-
temperature
indication
appears
immediately.
b. Defective EIB board (A2)
6. Engine is hard a. Low compression, which
to start.
Cranking speed
is normal and
the fuel supply
is adequate.
7. Engine starts a. Low oil pressure or
but then stops
after a few
seconds by
automatic
shutdown.
b. Defective EIB board (A2)
May 2, 2013
Revision 2
connections or faulty cables
viscosity
damaged hoses or fuel
lines between tank and fuel
pump
temperature switch
may be caused by sticking
or burned exhaust valves,
worn or broken
compression rings, leaking
cylinder head gasket, or
valve clearance adjustment.
defective oil pressure
switch.
Test, Check, and/or Remedy
Check the battery and recharge or replace
Check all connections and cables. Tighten or replace
as required.
Check the oil. Refer to Section 2-2.
Remove and replace the oil as necessary.
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
Open the shutoff valve on the fuel tank.
Replace fuel filters. Also, check the gaskets for
leaking or damaged condition.
Tighten all fittings and connections. Replace any
damaged hoses or fuel links.
Replace the EIB board.
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.
Replace the EIB board.
Check the compression in accordance with
instructions in the engine manufacturer's operation
manual. Overhaul the engine to make repairs as
necessary.
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.
Replace EIB board.
Chapter 2-4
Page 11