TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311 -20-1 14-7 COOLANT HEATER This task covers: a. Removal b. Installation INITIAL SETUP References General mechanic’s tool kit (item 64, Appx H) TM 9-2350-311-10 Lockwasher (item 95, Appx G) Fuel inlet-to-fuel tank hose quick disconnect at primary fuel filter disconnected (para 6-6) Batteries disconnected (para 8-28) a. Removal 1 2 3 4 5 6 7 Disconnect wiring harness (1) at coolant heater (2) plug. WARNING Coolant is a hazardous waste and must be disposed of in accordance with local procedures or direction of the local Hazardous Waste Management office. NOTE If hoses are not plugged and outlet is not capped, coolant system must be drained (TM 9-2350-311 -10). Loosen clamp (3) from coolant outlet hose (4) and disconnect hose from coolant heater (2). Cap heater coolant outlet (5) with a short piece of 5/8-in. - (16-mm-) id hose and 5/8-in. - (16-mm-) diameter plug. Loosen inlet hose clamp (6) and disconnect coolant inlet hose (7). Install 5/8-in. - (16-mm-) diameter plug in coolant pump (8) outlet. Disconnect fuel pump-to-coolant heater tube (9) at coolant heater (2). Remove screw (10), Iockwasher (11), and bracket clamp (12). Discard Iockwasher. Remove four nuts (13), four flat washers (14), four screws (15), and two coolant heater upper brackets (16). NOTE Coolant heater must be lifted or tilted in order to reach exhaust tube clamps. Loosen exhaust tube clamp (17) at heater exhaust hose (18) and disconnect hose. Remove coolant heater (2) from hull. 14-12