TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 1106 of 1275

TM 9-2350-311-20-1

b. Installation

NOTE

Coolant heater must be lifted or tilted in order to reach exhaust tube clamps.

1 Connect heater exhaust hose (18) with exhaust tube clamp (17) to coolant heater (2).

2 Position two coolant heater upper brackets (16) over coolant heater (2) and install four screws (15), four flat

washers (14), and four nuts (13).

3 Secure heater exhaust hose (18) with bracket clamp (12), new lockwasher (11), and screw (10).

4 Connect fuel pump-to-coolant heater fuel tube (9) at coolant heater (2).

5 Remove coolant pump (8) outlet plug if necessary and install coolant inlet hose (7) with inlet hose clamp (6).

6 Remove heater coolant outlet (5) cap and plug from coolant outlet hose (4) if used. Install coolant outlet hose

on coolant heater hose outlet with clamp (3). If caps and plugs were not used, refill coolant system (TM 9-

2350-311-10).

7 Connect wiring harness (1) at coolant heater (2) plug.

NOTE

FOLLOW-ON MAINTENANCE:

Connect fuel inlet-to-fuel tank hose quick

disconnect at primary fuel filter (para 6-6)

Connect batteries (para 8-28)

14-13