TM-9-2320-260-20

TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

APRIL 1995

TM-9-2320-260-20 - Page 1143 of 1337

TM 9-2320-260-20

14-14. ENGINE COOLANT HEATER AND MOUNTING BRACKET REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP

APPLICABLE MODELS

All

MATERIALS/PARTS

Ten locknuts

REFERENCES (TM)

TM 9-2320-260-10

TM 9-2320-260-20P

EQUIPMENT CONDITION

Lockwasher

●

Parking brake set (TM 9-2320-260-10).

Cotter pin

●

Battery ground cable disconnected (para. 4-48).

NOT E

●

Close fuel valve, heater-battery box valve, water manifold valve,

and engine oil cooler valve prior to removal.

1.

2.

3.

4.

5.

6.

7.

8.

●

Have drainage container ready to catch coolant and fuel.

Disconnect fuel line (21) from elbow (22).

Remove locknut (6), lockwasher (5), screw (2), and two ground leads (3) and (7) from frame (4).

Discard locknut (7) and lockwasher (5).

Remove cotter pin (9) and exhaust tube (8) from heater (1). Discard cotter pin (9).

Remove two safety pins (16), release two handles (15), and pull battery box (14) onto running

board (13).

Loosen clamp (18) and remove hose (17) from pump elbow (12).

Loosen clamp (25) and remove hose (26) from heater-battery box valve (23).

Remove nut (11), wire (10), nut (19), and ground lead (7) from pump (20).

Disconnect harness (24) from heater (1) and remove battery box (14) from running board (13).

14-26