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 1045 of 1417

REMOVAL

NOTE

Have container ready to catch coolant.

1.

Loosen hose clamp (Figure 1, Item 7) and disconnect personnel heater inlet hose (Figure 1, Item 8) from water

manifold shutoff drain valve (Figure 1, Item 6).

2.

Disconnect connector (Figure 1, Item 5) from water temperature sending unit (Figure 1, Item 4) at water

manifold (Figure 1, Item 12).

3.

Disconnect ether cylinder-to-safety valve line (Figure 1, Item 3) and safety valve-to-atomizer line

(Figure

1,

Item

1) from ether start safety valve (Figure 1, Item 2).

NOTE

Clean area around water manifold to prevent dirt or debris from entering cylinder head water

ports when water manifold is removed.

4.

Remove 12 screw assembled lockwashers (Figure 1, Item 13) and manifold (Figure 1, Item 12) from cylinder

heads (Figure 1, Item 11). Discard screw assembled lockwashers.

5.

Remove six gaskets (Figure 1, Item 9) from cylinder head water ports (Figure 1, Item 10). Discard gaskets.

6.

Plug openings on six open cylinder head water ports (Figure 1, Item 10) to prevent dirt from entering water

ports.

TM 9-2320-272-23-2

0290

0290-2