TM-9-2350-358-BD

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE

MARCH 1994

TM-9-2350-358-BD - Page 179 of 343

TM 9-2350-358-BD

7-15.

RELAY, HYDRAULIC PUMP MOTOR - CONTINUED

2.

Set MASTER power switch to OFF.

3.

Remove two leads 100 from hydraulic relay terminal A1 and two leads 100 from hydraulic relay terminal A2.

4.

Connect the two leads 100 from terminal A1 and the two leads 100 from terminal A2, using screw, washer,

lockwasher, and nut from hydraulic relay.

5.

Insulate and secure leads 100 using electrical tape.

6.

Set MASTER power switch to ON.

7.

Record BDAR action taken.

When mission Is complete, as soon as practical, repair the equipment/system using

standard maintenance procedures.

7-16.

OVERLOAD SENSOR, HYDRAULIC PUMP MOTOR

General Information:

The overload sensor monitors current drawn by the hydraulic pump motor When the current exceeds a predetermined

amount, the sensor opens the circuit to protect the motor.

Limitations:

None

Personnel/Time Required:

•

1 soldier

•

0.5 hour

Materials/Tools:

•

Wire, electrical (item 74, Appendix C)

•

Tape, insulation electrical (item 63, Appendix C)

References:

TM 9-2350-314-20-2-1

CAUTION

With overload sensor bypassed, an overload condition caused by the hydraulic pump motor will

not be detected.

The hydraulic pump motor must be periodically monitored for overheating, which

would Indicate an overload condition.

Failure to heed this caution may cause damage to, or

destruction of the hydraulic pump motor.

7-19