TM 9-2320-280-10
SECTION II. TROUBLESHOOTING
3-5. GENERAL
Troubleshooting, table 3-1, contains instructions that will help the operator
identify and correct simple vehicle malfunctions. The table also helps the operator
identify major mechanical difficulties that must be referred to unit maintenance.
The listing of possible malfunctions come under major vehicle headings. They are:
Engine
Heating system
Transmission
Transfer case
Brakes
Wheels and tires
Steering
Winch
Special purpose bodies
3-6. TROUBLESHOOTING PROCEDURES
a. Table 3-1 lists the common malfunctions which you may find during the
operation or maintenance of M998 series of vehicles or its components. You should
perform the tests/inspections and corrective actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests or
inspections and corrective actions. If a malfunction is not listed or is not corrected
by listed actions, notify your supervisor.
CAUTION
Entering water too fast will cause water to splash up over hood and
into air intake. The engine may stop abruptly and will not crank.
Do not continue starting efforts; damage to engine will result.
NOTE
Hydrostatic lock is caused by the entry of substantial amounts of
water into the engine through the air intake system and
subsequent contamination of the fuel system. Hydrostatic lock
most frequently occurs during or just after fording. Water is
forced into the air intake system, is drawn into the engine, and
effectively "locks-up" the engine.
Notify unit maintenance for further engine tests if you suspect
hydrostatic lock.
3-2
