TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 3 Download
Page 570 of 1170
CAUTION TM 9-2320-280-20-3 11-202. COMPRESSOR BELT MAINTENANCE This task covers: a. Removal c. Adjustment b. Installation INITIAL SETUP: Applicable Models M997, M997A1, M997A2 Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Special Tools Belt tension gauge (Appendix B, Item 67) Crowfoot, 14 mm (Appendix B, Item 152) Personnel Required One mechanic One assistant Manual References TM 9-2320-280-24P Equipment Condition ● Engine right splash shield removed (para. 10-20). ● Engine access cover removed (para. 10-15). ● Serpentine drivebelt removed (“A2” series only) (para. 3-83). 1. Loosen two capscrews (10) from compressor (11) and support bracket (12). 2. Loosen two nuts (1) and capscrew (7) from adjusting bracket (5) and mounting ears (6). 3. Loosen nut (2) on adjusting bracket (5) and timing cover bolt (3), and push compressor (11) toward timing chain cover (4) to loosen belt (9). 4. Disconnect fan drive hose (15) from fan drive assembly (17). 5. Remove belt (9) from compressor pulley (8), water pump pulley (14), crankshaft pulley (16), and over fan blades (13). b. Installation Install belt (9) over fan blades (13) and place belt (9) on crankshaft pulley (16), water pump pulley (14), and compressor pulley (8). NOTE If belt was replaced, go to step 2. 1. Perform Removal, steps a.1 through a.4. DO not pry against compressor housing with pry bar when adjusting belt tension. Compressor may be damaged. 2. Pull compressor (11) away from timing chain cover (4) and position pry bar between rear mounting ear (6) and support bracket (12) to adjust belt tension. 3. Using belt tension gauge, check belt (9) for proper tension (refer to table 11-1). Table 11-1. Compressor Belt Tension Requirements NOTE A “used” belt iS one that has run at least fifteen minutes or fifteen miles (24 kilometers). 11-306