Engine and Controls (continued)
See section 2-4 for all figures referenced in this section.
Trouble, Symptom and Condition
Probable Cause
Test, Check, and Remedy
4.
Engine starts then stops when
ENGINE CIRCUIT toggle
switch S404 is released to
“ON” position.
a. Open over temperature
switch S402 or defective
ENGINE CIRCUIT toggle
switch.
Place a clip-lead jumper wire on
the water temperature switch
terminals and check for normal
operating temperature. If engine
then starts properly, replace
water temperature switch. If not,
replace engine switch.
b. Choked fuel filter, restriction
in air cleaner, or air in fuel
system.
Check for these faults according
to instructions in the Engine
Manufactures User’s Manual.
5.
Engine does not attain normal
idle RPM, or idles too fast.
a. Loose throttle linkage
If solenoid core is pulled into the
full throttle solenoid L403 when
SPEED CONTROL toggle
switch S406 is in RATED RPM
position, check for loose control
rod between solenoid and
throttle. Tighten if required. If
solenoid core does not pull in,
proceed to the next step.
b. Defective full throttle
solenoid L403.
Check for l2-V-DC across two
terminals of solenoid when
S406 is in RATED RPM
position. If l2-V DC is measured,
but solenoid core does not pull
in, replace the solenoid.
6.
Engine will not run at rated
speed (2450-2550 RPM)
a. SPEED CONTROL toggle
switch S406 (10, Figure 4)
defective.
If engine will not go from idle to
rated speed when SPEED
CONTROL toggle switch is in
RATED RPM position, turn off
engine and take resistance
measurements at SPEED
CONTROL toggle switch
terminals with switch in the
RATED RPM position.
Zero resistance should be
measured between terminals
having red-blue and orange
yellow wires. Replace speed
control switch if measurement is
improper.
November 1, 2000
Chapter 2-5
Revised 03/01
Page 3
OM-2094 / Operation and Maintenance Manual
Jet-Ex 5D / Series 500285 / Generator Set
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