TM-9-2350-274-BD

M109/M110/M578 VEHICLES HOWITZER, MEDIUM, SELF-PROPELLED FULL-TRACKED

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1984

TM-9-2350-274-BD - Page 99 of 219

TM 9-2350-274-BD

ELECTRICAL SYSTEM

SECTION III. Motors, Starters, Alternators

6-7. General.

Repair on automotive motors should be limited to relays, solenoids and brushes.

Damage to casings and windings cannot be expediently repaired.

6-8. BLOWER MOTOR, AIR CLEANER FAILURE

General Information

The air cleaner blower motors get electrical power through a relay. When the relay is

defective it may be by-passed to regain the use of the blower motors. The charging

system is also controlled through the same relay.

When the engine is not running the

jumper wire must be removed to prevent the electrical system from being discharged.

Limitations:

●

None

Personnel/Time Required:

●

1 soldier

●

15 to 30 minutes

Materials/Tools:

●

Insulated wire

●

Multimeter lead

●

Needle-nose pliers

●

Tape

Procedural Steps:

1. Turn off MASTER switch.

2. Locate air cleaner blower relay behind portable operators panel in driver’s

compartment.

6-7