TM 5-3805-280-24-1
Sub-System Diagnostics
PROPEL SPEED
Turn key switch OFF.
YES: Solenoid is OK. Go
CHANGE
to next check.
PROPORTIONAL
Remove wire clip from bottom of solenoid harness
SOLENOID (Y6) CHECK
connector.
NO: Solenoid has failed.
Replace.
Disconnect harness from solenoid.
Connect ohmmeter to solenoid terminals.
T7491AC
UN08APR91
Does ohmmeter read approximately 24 ohms?
1/1
Turn key switch OFF.
YES: Harness and engine
PROPEL SPEED
and pump controller are
CHANGE
9015
OK.
Install proportional solenoid test harness JT07352 in series with wiring harness and
PROPORTIONAL
15
sense solenoid.
SOLENOID (Y6)
92
HARNESS CHECK
NO: Harness or engine
and pump controller has
Connect voltmeter to test harness jacks.
failed. Repair or replace.
Start engine and while observing voltmeter, drive machine at full propel speed until fast
speed kicks in.
Does voltmeter read approximately 6 volts in slow speed, and 12 volts in fast speed?
1/1
ARM REGENERATIVE
Turn key switch OFF.
YES: Solenoid is OK. Go
PROPORTIONAL
to next check.
SOLENOID (Y9) CHECK
Remove wire clip from bottom of solenoid harness
connector.
NO: Solenoid has failed.
Replace.
Disconnect harness from solenoid.
Connect ohmmeter to solenoid terminals.
T7491AC
UN08APR91
Does ohmmeter read approximately 24 ohms?
1/1
4-157