TM 9-2350-256-34-1
Section Il. TROUBLESHOOTING
2-5.
a.
NOTE
Information in this section is for use by
direct support and general support
(DS/GS) maintenance personnel in con-
junction with and as a supplement to the
troubleshooting
s e c t i o n in
the
organizational maintenance manual. It
provides continuation of instructions
where a remedy in the organizational
manual refers to DS/GS maintenance per-
sonnel for corrective action.
scope
This section contains troubleshooting or
malfunction information and tests for locating and
correcting most of the troubles which may develop
in the Recovery Vehicle, M88A1. Each malfunction
or trouble symptom for an individual component,
unit or system is followed by a list of tests or in-
spections necessary for you to determine probable
causes and suggested corrective actions for you to
remedy the malfunction.
b. This manual cannot list all possible malfunc-
tions that may occur or all tests or inspections, and
corrective actions. If a malfunction is not listed (ex-
cept when malfunction and cause are obvious) or is
not corrected by listed corrective actions, you
should notify higher level maintenance.
c. Table 2–2 lists the common malfunctions that
you may find during the operation or maintenance
of the M88A1 or its components. You should per-
form the tests/inspections and corrective actions in
the order listed.
NOTE
Before you use this table, be sure you
have performed all normal operational
checks. If you have a malfunction which
is not listed in this table, notify the next
higher level of maintenance.
NOTE
Refer
to
TM
9-2350-256-34-2
for
troubleshooting main and auxiliary
hydraulic systems.
Table 2-2. Troubleshooting
MALFUNCTION
TEST OR INSPEC’TION
CORRECTIVE ACTION
FUEL TANKS
1.
FUEL LEAKING FROM FORWARD FUEL TANKS
Inspect forward fuel tank for cracks or open seams. Fuel leaking thru a small crack can usually be detected by dust clingjng to the
wet area.
a.
If leaking area is accessible without removing the fuel tank:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
Drain the fuel system (TM 9-2350-256-20, Medium Recovery Vehicle, M88A1).
Close fuel valves to left and right rear fuel tanks.
Remove the armor cover under the hull to expose the forward fuel tank drain plug. Remove the drain plug.
Remove electric intank fuel pump (TM 9-2350-256-20, Medium Recovery Vehicle, M88A1).
Slush tank interior with methy lene chloride (pure) or chemical cleaner as specified in TB 750-1047,
Elimination of Combustibles From Interiors of Metal or Plastic Gasoline and Diesel Fuel Tanks, to remove
residual fuel, dirt, sediment and other foreign matter. Drain and air dry tank.
Weld cracked area as required.
Close forward fuel tank bypass valve and drain valve. Install drain plug in bottom of tank.
Install electric fuel pump (TM 9-2350-256-20, Medium Recovery Vehicle, M88A1).
Disconnect the fuel vent hope on top of the forward fuel tank.
Connect an air hose and suitable gage to the disconnected vent opening in the forward fuel tank, apply 3-4 psi
internal air pressure.
Apply soapy water solution, consisting of liquid soap diluted with 20-40% water, to all exterior surfaces of
tank and inspect for air bubble formation.
Mark location of any bubble formation, release air pressure, rinse and dry tank and weld the marked area.
Repeat points (10), (11), and (12) if required.
b. If leaking area is inaccessible with the fuel tank installed:
(1)
Drain the fuel system (TM 9-2350-256-20, Medium Recovery Vehicle, M88A1).
(2)
Remove the forward fuel tank from the vehicle (TM 9-2350-256-20, Medium Recovery Vehicle, M88A1).
(3)
Slush tank interior with methylene chloride (pure) or chemical cleaner as specified in TB 750-1047,
Elimination of Combustibles From Interiors of Metal or Plastic Gasoline and Diesel Fuel Tanks, to remove
residue] fuel, dirt, sediment and other foreign matter. Drain and air dry tank.
2-6
C h a n g e 2
