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 504 of 1015

TM 9-2320-272-24-1

3-48. EXHAUST STACK REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

APPLICABLE MODELS

REFERENCES (TM)

All

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

General mechanic’s tool kit (Appendix E, Item 1)

EQUIPMENT CONDITION

MATERIALS/PARTS

Parking brake set (TM 9-2320-272-10).

Gasket (Appendix D, Item 170)

GENERAL SAFETY INSTRUCTIONS

Locknut (Appendix D, Item 317)

GM grease (Appendix C, Item 28)

Do not touch hot exhaust system components with

bare hands.

WARNING

Do not touch hot exhaust system components with bare hands.

Injury to personnel may result.

1.

Remove locknut (6) and screw (3) from clamp (2) at right rear of cab (7). Discard locknut (6).

NOTE

Assistant will help with step 2.

2.

Remove clamp (2) from exhaust stack (1) and muffler (4).

3.

Remove exhaust stack (1) and gasket (5) from muffler (4). Discard gasket (5) and clean gasket

remains from mating surfaces.

b. Installation

1.

Apply small amount of GM grease on muffler mating surface, and position new gasket (5) and

exhaust stack (1) over muffler (4) so opening of exhaust stack (1) is directly away from cab (7).

NOTE

Assistant will help with step 2.

2.

Secure exhaust stack (1) to muffler (4) with clamp (2), screw (3), and new locknut (6).

3-140