Hobart 90CU24, Руководство по эксплуатации и обслуживанию

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Engine Controls
Trouble, Symptom Test, Check, And/or
and Condition Probable Cause Remedy
8. Engine starts. Stops after a
few seconds by automatic
shutdown. a. Shut-down circuit may have
functioned normally to stop
engine because of low
lubricating oil pressure or
due to a defective oil
pressure switch (S46,
located on engine block on
right side). Restart engine, and observe oil
pressure gage. If oil pressure is
12 psi or more, disconnect wire
from oil pressure switch terminal
N.C. Restart engine. If engine
continues to run, oil pressure
switch is defective. Replace oil
pressure switch. If engine
stops, check for following
malfunctions:
b. Failure of fault relays on the
generator control PC board
can cause this mal-
function: The low oil
pressure relay, K71, (4, Fig.
3), or the PC board itself
could have developed a
malfunction. In search of this malfunction,
replace, in sequence, the low oil
pressure fault relay, and the
generator control PC board
itself.
9. All panel and clearance lights
are either always ON or always
OFF. a. Marker lights circuit
breaker, CB11 (33, Fig. 2)
won’t close Replace marker lights circuit
breaker (CB11) if defective.
b. Clearance/panel lights
relay, K70 (6, Fig 3) could
be defective, or the PC
board itself could have
developed a malfunction. Replace relay K70 in attempt to
make the lights function
correctly. If replacement of this
relay doesn’t correct the
malfunction, replace the
generator control PC board.
10. Engine either goes from rated
speed to idle speed, or shuts
down. a. Low fuel relay, K65 (10,
Fig. 3), or the generator
control PC board itself,
could be defective. Replace relay K65 and restart
unit. If fault remains, replace
the PC board.
11. Engine has slow response
time. a. Governor controller
improperly adjusted Adjust. See 2-3; Para. 3.
b. Actuator linkage binding Inspect and repair as required.
c. Engine needs tune-up Tune-up as required. Refer to
Cummins Operation Manual.
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
November 27/1997 Chapter 2-4
Page 11