TM 9-2330-271-14&P
Table 3-2. Troubleshooting - Continued
Table 3-2. Troubleshooting - Continued
MALFUNCTION
MALFUNCTION
TEST OR INSPECTION
TEST OR INSPECTION
CORRECTIVE ACTION
CORRECTIVE ACTION
SUSPENSION SYSTEM
ELECTRICAL SYSTEMS - Continued
9.
SEMITRAILER SAGS TO ONE SIDE
3.
ALL CHASSIS LIGHTS ARE ON AND VAN
Step 1 Check tires to see if air pressure is low or
CLEARANCE LIGHTS ARE OFF
uneven
Step 1. Check to see if 24-volt light connection at
Inflate tires to correct pressure (paragraph
receptacle is loose
Pull out plug, clean and reinsert, insure that a
Step 2 Check to see if load in semitrailer is
good connection is made
unevenly distributed
Step 2. Inspect for dirty or corroded contacts in
Distribute load evenly
24-volt light receptacle
10.
EXCESSIVELY WORN, SCUFFED, OR CUPPED
Clean contacts (paragraph 3-3b)
TIRE(S)
4
DIRECTIONAL SIGNALS INOPERATIVE
Step 1 Check for improper tire pressure
Inspect for dirty or corroded cable socket and
Inflate to correct pressure ( paragraph 3-18b)
contacts
Step 2 Inspect wheels for looseness
Clean socket and contacts (paragraph
Tighten wheel stud nuts
AIR SUSPENSION SYSTEM
BRAKE SYSTEM
11
ALL STAR SPRINGS FLAT
5
BRAKES WILL NOT RELEASE
Check air pressure
Step 1. Check to see if relay valve is in applied
Build up air pressure to 65 psi
position
AIR MOUNTED FIFTH WHEEL KINGPIN
If semitrailer is coupled, wait until air pres-
12
AIR SPRINGS FLAT
sure on towing vehicle reads normal operating
Build up air pressure to 65 psi
pressure If semitrailer is uncoupled, open air
WHEELS, HUBS, BEARINGS, AND TIRES
reservoir drain cock
13
NOISY WHEELS
Step 2 Inspect intervehicular air hose connections
Inspect wheels for looseness
Connect hose(s) properly
Tighten wheel stud nuts
Step 3 Check air reservoir drain cock
14
WOBBLY WHEELS
Close air reservoir drain cock
Inspect wheels for looseness
Step 4 Check to see if shutoff valves on towing
Tighten wheel stud nuts
vehicle are closed
15
ABNORMAL TIRE WEAR
Open shutoff valves on towing vehicle
Step 1 Check tires for proper inflation
Step 5 Inspect intervehicular air for restrictions
Inflate tires to correct pressure (paragraph
Check intervehicular air lines for kinks,
bends, or restriction, and straighten
Step 2 Inspect tires to see if they are properly
6
NO BRAKES OR WEAK BRAKES
matched
Step 1 Check to see if intervehicular air lines are
Remove unmatched tire and replace with
properly connected
one that matches
Connect air lines properly
16
AIR LEAKAGE FROM TIRES
Step 2 Check for low air pressure
Step 1 Inspect valve core for damage or looseness
Inspect air supply lines for leaks. Notify
Tighten or replace valve core
organizational maintenance if leaks are found
Step 2 Check tire for puncture
or suspended
Replace punctured tire with spare (para-
7
SLOW BRAKE APPLICATION OR SLOW
graphs 2-9 and 3-18)
RELEASE
LEVELING JACK
Notify organizational maintenance
17
ERRATIC OPERATION.
8
GRABBING BRAKES
Check for adequate lubrication
Check air system for moisture
Lubricate in accordance with lubrication
Open drain cock on air reservoi r and
drain moisture
3-10
