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

  TM-9-2320-272-23-2 - Page 1039 of 1417

REMOVAL (EXTERNAL BYPASS)
WARNING
Do not drain coolant when engine is hot. Severe burns may result. Failure to comply may
result in injury or death to personnel.
1.
Drain three quarts of coolant from oil cooler valve (Figure 3, Item 17) into container.
2.
Loosen clamp (Figure 3, Item 5) and remove hose (Figure 3, Item 4) from adapter (Figure 3, Item 8).
3.
Loosen alternator link screw (Figure 3, Item 18).
4.
While supporting alternator (Figure 3, Item 21), remove two screws (Figure 3, Item 19) and washers
(Figure
3, Item 20) from brackets (Figure 3, Items 22 and 25) and move alternator aside.
5.
Remove four screws (Figure 3, Item 23) and bracket (Figure 3, Item 25) from support housing
(Figure
3,
Item
14).
6.
Loosen clamp (Figure 3, Item 33) and remove hose (Figure 3, Item 1) from valve (Figure 3, Item 32).
7.
Loosen tube (Figure 3, Item 29) and fittings (Figure 3, Items 2 and 30) from tee (Figure 3, Item 31).
8.
Remove tee (Figure 3, Item 31) from thermostat housing (Figure 3, Item 10).
9.
Remove valve (Figure 3, Item 32) from tee (Figure 3, Item 31).
NOTE
Note the location of long and short screws.
10.
Remove short screw (Figure 3, Item 6), long screw (Figure 3, Item 3), adapter (Figure 3, Item 8), and gasket
(Figure 3, Item 9) from thermostat housing (Figure 3, Item 10). Discard gasket.
11.
Loosen clamp (Figure 3, Item 28) and remove hose (Figure 3, Item 26) from thermostat housing
(Figure
3,
Item 10).
12.
Remove two screws (Figure 3, Item 7), thermostat housing (Figure 3, Item 10), thermostat (Figure 3, Item 12),
and gasket (Figure 3, Item 13) from support housing (Figure 3, Item 14). Discard gasket.
13.
Remove seal (Figure 3, Item 11) from thermostat housing (Figure 3, Item 10). Discard seal.
14.
Remove two screws (Figure 3, Item 27), support (Figure 3, Item 14), and gasket (Figure 3, Item 15) from engine
block (Figure 3, Item 16). Discard gasket.
15.
Remove plug (Figure 3, Item 24) from support (Figure 3, Item 14).
TM 9-2320-272-23-2
0289
0289-6


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