TM 5-3805-292-23
0006
POWERTRAIN TROUBLESHOOTING - MACHINE DOES NOT HAVE MOVEMENT
0006
Start engine and disengage
parking brake. Ensure parking
M
Light off?
NO
brake indicator turns off (TM 5-
3805-292-10).
CONTINUED
YES
WARNING
o DO NOT disconnect or remove any hydraulic system line or fitting unless engine is shut down and hydraulic
system pressure has been relieved. Tighten all connections before applying pressure. Escaping hydraulic
fluid under pressure can penetrate the skin.
o Use a piece of cardboard, newspaper, or wood to check for pressurized leaks, to prevent fluid penetrating
the skin.
o Contact with engine/hydraulic oil can damage skin. Wear gloves when handling engine/hydraulic oil. If oil
contacts skin, wash it off immediately. Failure to follow this warning may result in injury to personnel.
Problem still
Perform Checking Charge
Stop.
NO
exists?
Pressure (WP 0007).
YES
Disconnect brake release and tandem
pump neutral override solenoid (WP
Disconnect instrument panel (IP) C23
0070). Use instrument panel setup to
(WP 0155). Check for continuity between
energize brake valve circuit (WP 0007).
brake release and tandem pump neutral
Measure voltage between brake
override solenoid connector 80-A, circuit
12V present?
NO
release and tandem pump neutral
258B (T), harness side, and IP C23-8,
override solenoid connector 80-A,
circuit 258A (T), harness side (WP 0175,
circuit 258B (T), harness side, and
Miscellaneous Circuits).
Miscellaneous Circuits).
YES
Check for continuity between brake
release and tandem pump neutral
Replace IP (WP 0155).
YES
present?
override solenoid electrical
connector 80-B, circuit 178AL (B),
harness side, and ground (WP
NO
Circuits).
Perform Open Harness Test for circuit
Replace brake release and
258 (WP 0173).
tandem pump neutral override
YES
present?
solenoid (WP 0070).
NO
Repair circuit 178AL (B) or replace
chassis wiring harness (WP 0146).
