TM-5-2350-377-14-P
ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST) SUPPORTING THE HYDRAULIC BLADE FOLDER-TRACK TENSIONER (HBF-TT)
TM-5-2350-377-14-P - Page 60 of 335
TM 5-2350-377-14&P
0008 00
0008 00-19
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. TRACK (LEFT OR RIGHT) WILL NOT TIGHTEN OR LOOSEN, HBF-TT SYSTEM (ELECTRICAL)
WARNING
24 volts DC is present in the M9 electrical system.
Do not connect measuring
instruments with master switch on or connect measuring instruments incorrectly.
Failure to comply could damage vehicle electric equipment, measuring instruments,
or injure personnel.
Step 1. Check for ground continuity.
Disconnect control box power harness (4) from control box (3).
Check for ground continuity from socket
E (2) to ground (5) behind instrument panel.
If an open circuit is indicated, replace control box power harness (4).
Verify that problem
is solved.
If continuity is indicated, go to step 2.
Step 2. Check control box power wiring harness (4) for a minimum of 24 VDC at socket C (1).
Using volt meter with negative lead in socket E (2) and positive lead in socket C (1), turn on master
switch.
If no voltage is present at socket C (1), turn master switch off, go to step 3.
If minimum 24 VDC is present, turn master switch off, go to step 5.
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