TM 9-2320-363-34-1
Section II. TROUBLESHOOTING
This section contains troubleshooting, testing, and repair information for the M915 family of vehicles.
Make sure the problems are real. Be sure the electrical or hydraulic power is on when needed. Refer to
the preliminary troubleshooting procedures before you start troubleshooting, and during troubleshooting
when referenced.
Page
Preliminary Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2
Relieving Hydraulic System Pressure (M916A1 and M916A2)
. . . . . . . . . . . . . . . . . .
2-2
Transmission Stall Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3
Troubleshooting Symptom Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4
Troubleshooting Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-6
Troubleshooting and Testing the Air Conditioning System
(All Except M915A2 and M916A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-28.1
N O T E
Fluid leaks are classified as Class I, Class II, or Class III.
Class I:
drops.
Seepage of fluid, as indicated by wetness or discoloration, not great enough to form
Class II:
Leakage of fluid great enough to form drops, but not enough to cause drops to drip from
the item being checked or observed.
Class III:
observed.
Leakage of fluid great enough to form drops that fall from the item being checked or
Before starting any specific troubleshooting procedures, perform the following procedures:
1.
Visually check for ruptured oil hoses or tubes, and for Class II or Class III leaks.
2.
Check for mechanical jamming or binding caused by rocks or other foreign matter.
3.
Check fluid levels in subject area and service as required (Unit PMCS, TM 9-2320-363-20-1).
Cycle hydraulic winch controls a few times to drain and relieve system pressure.
2-2
Change 1
