TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 640 of 1015

3-99. PRIMARY

TM 9-2320-272-24-1

NOTE

Tag wires for installation.

1.

Disconnect wire (8) and ground wire (1) from secondary low air pressure switch (7).

NOTE

Assistant will help with steps 2 and 3.

2.

Remove two nuts (4) and screws (3) from secondary air reservoir (6).

3.

Push and rotate secondary air reservoir (5) toward rear of vehicle.

4.

Remove low air pressure switch (7) and adapter fitting (6) from adapter elbow (2).

NOTE

Male pipe threads must be wrapped with antiseize tape before installation.

1.

Install adapter fitting (6) and secondary low air pressure switch (7) on adapter elbow (2).

NOTE

Assistant will help with step 2.

2.

Install two screws (3) and nuts (4) on secondary air reservoir (6).

3.

Connect wire (8) and ground wire (1) to secondary low air pressure switch (7).

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