Hobart 60PL20 Operation And Maintenance Manual page 89

TROUBLE, SYMPTOM
AND CONDITION
ENGINE AND CONTROLS (CONTINUED)
7. Engine will not come "up"
to governed speed in GEN
mode. (continued)
8. Engine goes to
overspeed when con-
trol switch (15,
Fig. 1) is in GEN mode.
December 31/91 Revised
PROBABLE CAUSE
D. Defective actuator
E. Defective governor
controller
A. Governed speed con-
trol adjustment set
too high (see 2-3,
Fig. 5)
B. Defective linkage or
actuator
C. Defective controller
TEST, CHECK, AND/OR
REMEDY
D. Refer to connection and sche-
matic diagram in Chapter 6 and
apply 12-V DC to the two
actuator input lead terminals.
Actuator lever should move im-
mediately to full speed position.
If lever does not move, replace
actuator.
E. Refer to connection and sche-
matic diagram in Chapter 6 and
connect a DC voltmeter to the
controller's terminal strip. Start
the engine and manually control
engine speed. At speeds below
governed speed, the voltmeter
should indicate within two (2) volts
of the system voltage. If voltage
is at near zero, turn speed
adjusting screw several turns
clockwise to be sure speed
setting is not too low because
of tampering. If voltage
remains low or at zero, replace
controller. Refer to governor
instruction booklet in Chapter 6
for controller bench tests and
adjustments.
A. Turn speed control adjust-
ing screw fully counterclock-
wise. Start engine. Place con-
trol switch (15, Fig. 1) in GEN
position. If engine speed is
now well below governed
speed, turn adjusting screw
clockwise until correct speed
(2000 RPM, 400-Hz) is attained.
If engine still goes to over-
speed, proceed to Step B.
B. Check governor linkage and
actuator for sticking or
binding in full-speed position.
Repair as required.
C. Replace controller. Check
it in accordance with governor
instruction booklet in Chapter 6.
OM-2053
3-1
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