TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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TM 9-2320-280-20-2 3-8. ENGINE AND TRANSMISSION OIL COOLER ASSEMBLY MAINTENANCE This task covers: a. Removal c. Cleaning and Inspection b. Installation INITIAL SETUP: Tools Equipment Condition General mechanic’s tool kit: Engine left splash shield removed (para. 10-17). automotive (Appendix B, Item 1) Power steering cooler removed (para. 8-28). Manual References General Safety Instructions TM 9-2320-280-10 Do not drain oil when engine is hot. TM 9-2320-280-24P Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). CAUTION Do not bend transmission oil cooler fins. Damaged fins reduce cooling efficiency, which may damage engine and/or transmission. a. Removal WARNING Do not drain oil when engine is hot. Severe injury to personnel will result. CAUTION Cover or plug all hoses and connections immediately after disconnection to prevent contamination. Remove all plugs prior to connection. NOTE Have drainage container ready to catch oil. Note position of hoses for installation. 1. Disconnect two engine oil cooler supply and return lines (7) from engine oil cooler ports (9). 2. Loosen two hose clamps (2) and disconnect two transmission oil cooler line connector hoses (1) from transmission oil cooler ports (3). 3. Remove four socket-head screw and washer assemblies (5), washers (6) and oil cooler (4) from radiator (8). 1. Install oil cooler (4) on radiator (8) with four washers (6) and socket-head screw and washer assemblies (5). 2. Connect two transmission oil cooler line connector hoses (1) to transmission oil cooler ports (3) and tighten two hose clamps (2). Tighten clamps (2) to 10-20 lb-in. (1-2 N*m). 3. Connect two engine oil cooler supply and return lines (7) to engine oil cooler ports (9). c. Cleaning and Inspection 1. Remove four socket-head screw and washer assemblies (5) and washers (6) securing oil cooler (4) to radiator (8). 2. Make four two-by-four wood blocks, 2-1/2 inches (63 mm) long. Raise oil cooler (4) 1-1/2 inches (38 mm) and place one block under each comer between oil cooler (4) and radiator (8). 3-12