Hobart 60PL20 Operation And Maintenance Manual page 88

OM-2053
TROUBLE, SYMPTOM
AND CONDITION
ENGINE AND CONTROLS (CONTINUED)
5. Engine starts. Stops after
a few seconds by automatic
shutdown.
6. Engine runs at idle speed.
Engine "ON" indicating light
(22, Fig. 1) does not glow.
7. Engine will not come "up"
to governed speed in GEN
mode.
3-1
Page 10
PROBABLE CAUSE
B. Defective or incor-
rectly wired high
temperature switch
(S 49, located on the
engine block on the
right side).
A. Lamp defective
B. Indicating light body
poorly grounded
A. 12-V DC power not
reaching governor
controller due to
defective operating
mode switch (15, Fig. 1)
B. Governor linkage
binding or governor
throttle sticking
C. Defective or mis-
adjusted magnetic
pickup (2, Fig. 4,
2-3).
TEST, CHECK, AND/OR
REMEDY
B. Check wiring to high temper-
ature switch. One Red-Yellow wire
should be connected to the C ter-
minal. With wires removed, check
resistance between terminals C and
N.C. A resistance reading of zero
indicates a good temperature
switch. A readable resistance
indicates a defective switch.
Replace switch if defective.
A. Replace lamp.
B. Be sure light is grounded
properly.
A. Apply 12-V DC directly to
terminal 1 on governor controller's
terminal strip. If engine comes-up
to speed, check following:
B. Check governor linkage and
throttle shaft for binding
and sticking. Repair as required.
C. The controller may not be
receiving a signal from the mag-
netic pickup and the "fail-safe"
feature of the controller may be
functioning to prevent any signal
from reaching the actuator. To
check the magnetic pickup, refer
to connection and schematic diagram
in Chapter 6 and disconnect pickup
input leads controler's terminal
strip. Connect a high impedance
AC voltmeter to the 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 as per Section 2-3,
Para. 4, E, (3) for ungrounded
magnetic pickup or Para. 4, F, (3)
for grounded magnetic pickup. If
magnetic pickup is properly adjusted
and voltage is still zero, replace
pickup.
December 31/91 Revised