TM-9-2320-272-23-4

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

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 4 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-4 - Page 1259 of 1393

REMOVAL

1.

Close water manifold drain valve (Figure 1, Item 1) and oil cooler drain valve (Figure 1, Item 2).

2.

Open toolbox door (Figure 1, Item 10).

3.

Close two engine coolant heater drain valves (Figure 1, Item 22).

4.

Loosen clamp (Figure 1, Item 19) and remove manifold inlet hose (Figure 1, Item 21) from heater pump elbow

(Figure 1, Item 8).

5.

Loosen clamp (Figure 1, Item 20) and remove pump outlet hose (Figure 1, Item 23) from heater pump adapter

(Figure 1, Item 14).

6.

Remove nut (Figure 1, Item 11) and lockwasher (Figure 1, Item 17) from terminal stud (Figure 1, Item 14) and

disconnect ground wire (Figure 1, Item 13) from heater pump (Figure 1, Item 6). Discard lockwasher.

7.

Remove nut (Figure 1, Item 18) and lockwasher (Figure 1, Item 17) from terminal stud (Figure 1, Item 15) and

disconnect wire (Figure 1, Item 16) from heater pump (Figure 1, Item 6). Discard lockwasher.

8.

Remove clamp (Figure 1, Item 4) and heater pump (Figure 1, Item 6) from pump bracket (Figure 1, Item 3).

9.

Remove heater pump elbow (Figure 1, Item 8) and adapter (Figure 1, Item 7) from heater pump.

10.

Remove heater pump adapter (Figure 1, Item 5) from port (Figure 1, Item 9).

TM 9-2320-272-23-4

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