Engine Controls
Trouble, Symptom
Test, Check, And/or
and Condition
Probable Cause
Remedy
Engine WILL NOT start.
Cranking speed normal. LOW
OIL indicating lamp on after 5
seconds. (continued)
b.
Defective or misadjusted
magnetic pickup (Chapter
2-3, Fig. 4).
The control unit may not be
receiving a signal from the
magnetic pickup and the
“fail-safe” feature of unit may be
functioning to prevent any signal
from reaching the actuator. To
check the magnetic pickup for
500392-1, refer to diagram
287451. Use this diagram to
disconnect pickup input leads at
terminals 10 and 11 on
controller.
Connect a high impedance AC
voltmeter to pickup output
leads. Crank engine but don’t
start. Voltage reading should be
a minimum of one (1) volt. If no
or low voltage is indicated,
check pickup adjustment [see
2-3,Para. 3, e,(2)]. If pickup is
properly adjusted and voltage is
still zero, replace pickup.
c.
Defective actuator
Apply 12-V DC to two actuator
input leads (terminals 4 and 5
on terminal strip). Actuator
lever should move immediately
to full speed position. If lever
does not move, replace
actuator.
d.
Faulty controller
Connect a DC voltmeter to
terminals 4 and 5 on the
controller terminal strip. Crank
engine. Voltmeter should
indicate within two (2) volts of
system voltage. If not, replace
controller.
e.
Loose connections,
damaged hoses or fuel
lines between tank and fuel
pump
Tighten all fittings and
connections. Replace any
damaged hoses or fuel links.
f.
Plugged or defective filter
Do not overlook the possibility
of restricted flow through
the fuel filters. Also check
gaskets for leaking or damaged
condition.
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
November 27/1997
Chapter 2-4
Page 9
