Hobart 6824-1, Operation And Maintenance Manual, Page: 103 / 214

Engine and Controls (cont.)
Trouble, Symptom & Condition Test or Inspection Corrective Action
8. Engine goes to overspeed
when control switch (18, Fig. 1)
is in GEN position. a. Governed speed control
adjustment set too high.
(See 2-3, Fig. 9)
Turn speed control adjustment
screw fully counterclockwise.
Start engine. Place control
switch (18, Fig. 2) 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 overspeed, proceed to
Step B.
b. Defective linkage or
actuator.
Check governor linkage and
actuator for sticking or binding
in full-speed position. Repair as
required.
c. Defective controller. Replace controller. Check unit
in accordance with Barber-
Colman operating instructions.
9. Engine is unsteady (surges)
under load. a. Fault in engine. Before condemning the
governor system for surging,
make certain the fault is not in
the engine. Make certain all
cylinders are firing properly and
air and fuel supply is proper.
b. Governor system faulty or
mis-adjusted.
Check and adjust as follows:
c. Loose or binding governor
linkage.
Check linkage ball joints and all
connections for looseness or
binding. Be sure linkage will
move from idle speed to full
speed without lost motion or
binding.
d. GAIN control improperly
adjusted.
Adjust GAIN control on
controller in accordance with
2-3; Para. 4, E, (3).
e. Magnetic pickup signal
weak.
Check and adjust pickup. See
2-3, Para. 3, E, (2).
10. Engine has slow response
time.
a. Governor controller
improperly adjusted.
Adjust. See 2-3; Para. 4, E, (3).
b. Actuator linkage binding. Inspect and repair as required.
c. Engine needs tune-up. Tune up as required. Refer to
Perkins Diesel Operator’s
Manual.
OM-499
May 31/94 Revised 3-1
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