TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 TACHOMETER MALFUNCTIONS 0088 00 INITIAL SETUP: M a i n t e n a n c e L e v e l Unit T o o l s a n d S p e c i a l T o o l s General Mechanic’s Tool Kit (WP 0541 00, Item 57) M a t e r i a l s / P a r t s Grease WP 0542 00, Item 14 P e r s o n n e l R e q u i r e d Unit Mechanic Helper (H) R e f e r e n c e s See your -10 See your PMCS E q u i p m e n t C o n d i t i o n Engine stopped (see your -10) Carrier blocked (see your -10) Power plant rear access door/panel removed (see your -10) Instrument panel partially removed (WP 0256 00) NOTE M548A1 and M548A3 troubleshooting procedures are the same. M548A1 procedure is shown. T 1. Start engine (see your -10). 2. Does tachometer fail to show any reading? YES NO GO TO BY (PAGE 0088 00-2) Y 1. Stop engine (see your -10). 2. Remove tachometer cable (1) from tachometer (2). 3. Start engine (see your -10). 4. Observe tachometer cable drive tip (3). 5. Does tachometer cable drive tip fail to rotate? YES NO YN 1. Stop engine (see your -10). 2. Replace tachometer (WP 0519 00). 3. Verify no faults found. 0088 00-1