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 1271 of 1393

INSTALLATION

1.

Slide engine coolant heater harness (Figure 2, Item 2) through grommet (Figure 2, Item 8) in toolbox

(Figure

2, Item 19) and grommet (Figure 2, Item 3) in firewall (Figure 2, Item 21) and connect to control box

(Figure

2,

Item 1).

2.

Connect lead (Figure 2, Item 22) to engine coolant heater harness lead (Figure 2, Item 4).

3.

Install ten tiedown straps (Figure 2, Item 5) on engine coolant heater harness (Figure 2, Item 2), fuel pump

cable (Figure 2, Item 6), hose (Figure 2, Item 7), and lead (Figure 2, Item 22).

4.

Connect ground wire (Figure 2, Item 15) to terminal stud (Figure 2, Item 14) on heater pump

(Figure

2,

Item

18) with lockwasher (Figure 2, Item 16) and nut (Figure 2, Item 17).

5.

Connect ground wire (Figure 2, Item 12) to terminal stud (Figure 2, Item 13) on heater pump

(Figure

2,

Item

18) with lockwasher (Figure 2, Item 11) and nut (Figure 2, Item 10).

6.

Connect engine coolant heater harness (Figure 2, Item 2) to engine coolant heater (Figure 2, Item 20).

7.

Close toolbox door (Figure 2, Item 9).

TM 9-2320-272-23-4

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