TM-9-2330-238-14
CHASSIS, SEMITRAILER: 6-TON, 4-WHEEL M295A1; SEMITRAILER, VAN: EXPANSIBLE, 6-TON, 4-WHEEL M313; SEMITRAILER, VAN: SHOP, FOLDING SIDES, 6-TON, 4-WHEEL M447 AND M447C; SEMITRAILER, VAN: REPAIR PARTS, SHOP EQUIPMENT, 6-TON, 4-WHEEL M749; SEMITRAILER, VAN: REPAIR PARTS STORAGE, 6-TON, 4-WHEEL M750
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1992
TM-9-2330-238-14 - Page 95 of 462
TM
9-2330-238-14
Table 3-1.
Operator/Crew
Troubleshooting
(Con’t).
MALFUNCTION
TEST
OR INSPECTION
CORRECTIVE
ACTION
2.
ONE
OR MORE
24-VOLT
LAMPS
(BUT NOT ALL) FAIL TO LIGHT.
Step
1.
Check for loose
plug
connectors
at affected
light assemblies.
Connect
loose
plug
connector.
Step 2.
Check for dirty or corroded
terminals
on intervehicular
cable.
If
connections,
receptacle,
and
plug
are
dirty
or
corroded,
notify
Organizational
Maintenance.
Step 3.
Check to see if rear bumper junction
connector
is loose if van and forward chassis
lights are On, but
all rear lights
are Off.
Remove,
clean,
and install
connector,
ensuring
socket
and contacts
are clean.
3.
ALL CHASSIS
LIGHTS
ARE ON AND VAN BODY CLEARANCE
LIGHTS
ARE OFF.
Step
1.
Check for loose
24-volt
connection
at receptacle.
Remove,
clean,
and install
plug,
ensuring
proper
connection
is made.
Step 2.
Check for dirty or corroded
contacts
in 24-volt light receptacle.
Clean
contacts.
4.
DIRECTIONAL
SIGNALS
INOPERATIVE.
Step
1.
Check for dirty or corroded
intervehicular
cable
socket
and contacts.
Clean
socket
and contacts.
Step 2.
Check for loose
plug
connectors
at affected
light.
Connect
loose
plug connectors.
BRAKE SYSTEM
5.
BRAKES
DO NOT ENGAGE.
Step
1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Check
to see if air reservoir
draincock
is open.
Close
air reservoir
draincock.
Check
intervehicular
air lines for proper
connections.
Connect
air lines properly
(para 2-10).
Check for closed
air valve
on towing
vehicle.
Open
air valve.
Refer to towing
vehicle
technical
manual
for instructions.
Check for low air pressure.
Inspect
air supply
and lines for leaks.
Tighten connections
where
applicable.
Check
master cylinder
for proper
level of brake
fluid.
Fill master cylinder
with brake fluid to proper
level
(Chapter
3, Section
I).
Check for brake
fluid leaks.
Open
air valves.
If brake fluid
is leaking,
notify
Organizational
Maintenance.
3-9
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