TM-9-2320-272-23-2

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

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-2 - Page 939 of 1417

REMOVAL

WARNING

Do not touch hot exhaust system components with bare hands. Failure to comply may result

in injury or death to personnel.

NOTE

Steps (1) through (4) are for M939/A1.

1.

Remove two screws (Figure 1, Item 12) and heat shield (Figure 1, Item 13) from cab heat shield brackets

(Figure 1, Item 11).

2.

Remove locknut (Figure 1, Item 4) and manifold coupling clamp (Figure 1, Item 1) from front exhaust pipe

(Figure 1, Item 5) and exhaust manifold (Figure 1, Item 2). Retain locknut (Figure 1, Item 4).

3.

Remove front exhaust pipe (Figure 1, Item 5) and gasket (Figure 1, Item 3) from exhaust manifold

(Figure

1,

Item 2). Discard gasket.

4.

Remove locknut (Figure 1, Item 8), screw (Figure 1, Item 10), coupling clamp (Figure 1, Item 7), front exhaust

pipe (Figure 1, Item 5), and gasket (Figure 1, Item 6) from rear flex pipe (Figure 1, Item 9). Discard locknut

and

gasket.

NOTE

Steps (5) and (6) are for M939A2.

5.

Remove two screws (Figure 1, Item 10), two locknuts (Figure 1, Item 8), and coupling clamp

(Figure

1,

Item

7) from rear flex pipe (Figure 1, Item 9). Discard locknut.

6.

Loosen turbocharger coupling clamp (Figure 1, Item 4) and remove gasket (Figure 1, Item 3) and front exhaust

pipe (Figure 1, Item 5) from turbocharger.

TM 9-2320-272-23-2

0276

0276-2