MAINTENANCE OF THE HEMTT - OD1662 - LESSON 1/TASK 2
he troubleshoots the malfunction ELECTRIC GAGES DO NOT WORK, and
reaches the conclusion that a wire on the back of the instrument panel
is broken and needs to be repaired.
Prior to beginning the actual troubleshooting procedure, SGT Gilmore
43 and 44. After these procedures have been completed, he is ready to
begin the actual troubleshooting procedure.
SGT Gilmore disconnects the batteries following the procedures
contained in paragraph 7-91 of TM 9-2320-279-20-1.
He then removes
the instrument panel following the procedures contained in paragraph
7-19 of TM 9-2320-279-20-1.
After the instrument panel has been
removed, SGT Gilmore checks for loose or broken wires on the gages.
SGT Gilmore found several broken wires that will need to be repaired.
wires or cables to electrical components on this vehicle. To install
wires in crimp-type connectors, refer to FM 55-506-1.
locates the procedure(s) in this FM and repairs the broken wires.
Once the wires have been repaired, he reinstalls the instrument panel
and reconnects the batteries.
of the gages to ensure that they are functioning properly.
Hydraulic System Troubleshooting.
In the following paragraphs,
we will follow SGT Clarke as he troubleshoots an M977 for the
malfunction ONE OR MORE HYDRAULIC CIRCUITS NOT WORKING and reaches the
conclusion that the oil level in the reservoir is low and needs to be
Prior to beginning the troubleshooting procedure, SGT
pages 43 and 44.
After these procedures have been performed, he
begins the actual troubleshooting procedures.
SGT Clarke checks the selector valve for faulty operation,
loose line connections, or damage.
Since the valve functions
properly, the line connections were not loose, and the valve showed no
outward signs of damage, he proceeds to step 2.