TM-9-2320-362-14&P HMMWV Technical Manual Electrical Environmental System (EES) Download
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TM 9-2320-362-14&P 3-18. TACHOMETER REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Tools Manual Reference General mechanic’s tool kit: TM 9-2320-280-10 automotive (Item 1, Section III, TM 9-2320-280-20 Appendix B) Equipment Condition Materials/Parts Battery ground cable disconnected Seven lockwashers (TM 9-2320-280-20) P/N MS35338-137 One O-ring P/N MS9021-236 1. Remove seven screws (3), lockwashers (2), and washers (1) from tach/hourmeter box cover (4). Discard lockwashers (2). 2. Remove tach/hourmeter box cover (4) and gasket (5) from tach/hourmeter box (6). 3. Remove two knurled mounting nuts (15) and bracket (14) from tachometer (13) and remove tachometer (13) and O-ring (12) from tach/hourmeter box (6). Discard O-ring (12). 4 0 Disconnect leads (10), (11), and (16) from tachometer (13). 1. Install O-ring (12) to tachometer (13). 2. Connect leads to tachometer (13) as follows: a. Red lead (10) to connector (9), b. Black lead (11) to connector (8), c. Yellow lead (16) to connector (7). 3. Install tachometer (13) and bracket (14) on tach/hourmeter box (6) and secure with two knurled mounting nuts (15). 4. Install gasket (5) and tach/hourmeter box cover (4) on tach/hourmeter box (6) and secure with seven washers”(1), lock- washers (2), and screws (3). 3-34