Engine And Controls; Section 5. Troubleshooting Charts - Hobart Jet-Ex 5D Operation And Maintenance Manual

OM-2094 / Operation and Maintenance Manual
Jet-Ex 5D / Series 500285 / Generator Set

Section 5. Troubleshooting Charts

See section 2-4 for all figures referenced in this section.

Engine and Controls

Trouble, Symptom and Condition
1. Engine will not start. Starter
will not crank engine.
November 1, 2000
Revised 03/01
Probable Cause
a. Batteries discharged, sure
this voltage is reaching or
loose battery or ground
connection.
b. ENGINE START push
button switch S401
(12, Figure 4) defective.
c. Defective starter solenoid
L401 (5, Figure 2)
d. Defective starter B401
(4, Figure 2)
e. Internal engine seizure.
Test, Check, and Remedy
Check battery connections and
check voltage across battery.
Voltage should be approximately
12.8 VDC. If battery and
connections are good, proceed
to the next step.
Momentarily connect a jumper
between the hot side of the
starter solenoid L401 and the
start switch terminal on the
starter relay wire. If the starter
operates, replace faulty switch.
If starter doesn't crank, proceed
to the next step.
Momentarily connect a large
capacity jumper cable between
the hot side of the starter relay
(Figure 2) and the starter input
terminal. If the starter attempts
to crank the engine, the starter
solenoid is defective. Replace
it. If engine still won't crank,
proceed to the next step.
If the engine will not crank after
the previous steps, the starter is
defective. Replace starter. If
starter did attempt to operate,
but couldn't turn engine,
proceed to the next step.
CAUTION:
Make certain that engine start
switch is in "stop" position so
that engine does not start.
Use a socket wrench on the front
crankshaft pulley to try to turn
engine by hand. If engine will
not turn, internal damage is
indicated.
Chapter 2-5
Page 1