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 561 of 1417

BREATHER AND TUBE REMOVAL (M939/A1)

NOTE

•

References to early model engines refer to engines with a serial number before 11246664

used in M939/A1 series vehicles.

•

Perform Steps (1) and (2) on M939/A1 vehicles with late model engines and Steps (3)

through (5) on M939/A1 vehicles early model engines.

1.

Remove four clamps (Figure 1, Item 2), two breather hoses (Figure 1, Item 3), and breather tube

(Figure

1,

Item

4) from crankcase breather (Figure 1, Item 1) and elbow (Figure 1, Item 5).

2.

Remove elbow (Figure 1, Item 5) from air connector (Figure 1, Item 6).

3.

Remove locknut (Figure 1, Item 14), screw (Figure 1, Item 10), and clamp (Figure 1, Item 13) from mounting

bracket (Figure 1, Item 9) and breather tube (Figure 1, Item 4). Discard locknut.

4.

Remove screw (Figure 1, Item 12), lockwasher (Figure 1, Item 11), and mounting bracket (Figure 1, Item 9)

from engine (Figure 1, Item 8). Discard lockwasher.

5.

Remove two clamps (Figure 1, Item 2), breather hose (Figure 1, Item 3), and breather tube (Figure 1, Item 4)

from crankcase breather (Figure 1, Item 1).

CAUTION

Perform Step (6) only if crankcase breather requires replacement. Removal will permanently

damage breather, and it must be replaced.

6.

Mark position of crankcase breather (Figure 1, Item 1) on valve cover (Figure 1, Item 7) and remove breather.

TM 9-2320-272-23-2

0223

0223-2