Hobart Brothers 6910, Operation And Maintenance Manual With Illustrated Parts List

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Trouble Shooting Chart (Sheet 5 of 20)
Figure 5
TROUBLE, SYMPTOM TEST, CHECK, AND/OR
AND CONDITION PROBABLE CAUSE REMEDY
ENGINE AND CONTROLS (CONTINUED)
7. Engine will not A. 12-V DC power not A. Apply 12-V DC directly to
come “up” to gov- reaching governor terminal 1 on governor con-
erned speed in GEN control box due to trol box. If engine comes-up
mode. defective operating to speed, check following:
ode switch (18, Fig.1)
B. Governor linkage B. Check governor linkage and
binding or governor throttle shaft for binding
throttle sticking and sticking. Repair as
required.
C. Defective or mis- C. The control unit may not be
adjusted magnetic receiving a signal from the
pickup (2, Fig. 5, magnetic pickup and the
2-3). “fail-safe” feature of the
unit may be functioning to
prevent any signal from
reaching the actuator. To
check the magnetic pickup,
disconnect pickup from con-
trol unit and 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 volt-
age is indicated, check
pickup adjustment.
If pickup is
properly adjusted and
voltage is still zero,
replace pickup.
D. Defective actuator D. Apply 12-V DC to the two
actuator input leads. Actua-
tor lever should move im-
mediately to full speed po-
sition. If lever does not
move, replace actuator.
OM-2028
June 20/89 Revised 3-1
Page 13