TM 9-2330-294-14
Table 4-2. Preventive Maintenance Checks and Services (Quarterly ) Continued
QQuarterly
Total man-hours required: 5.7
Work
time
Sequence
Item to be inspected
(M/H)
number
procedure
A F T E R ROAD TEST
Man-hours required: 2.7
12
0.3
Immediately after road test, cautiously feel brake drums and hubs. An
overheated brake drum and wheel indicate an improperly adjusted, defective, or
dry wheel bearing, or a dragging brake. An abnormally cool condition indicates
an inoperative brake.
LEAKS
13
0.2
Make general observations under semitrailer for lubricant or air leaks.
14
SUSPENSION SYSTEM
0.4
Inspect torque rods, shock absorbers, axle chain stops, mounting brackets,
equalizer beams and air suspension components for damage and wear. Check for
missing cotter pins and loose nuts. Replace axle stop chains that are badly
rusted or frozen at the joints (para 4-56 and 4-57).
FRAME
15
0.3
Make general observations of frame, condition and tightness of mounting bolts.
16
LUBRICATION
0.5
Lubricate semitrailer in accordance with lubrication chart (fig. 3-1 and 3-2).
Coordinate with inspection and disassembly operations to avoid duplication.
During wheel bearing lubrication, inspect tires. It is not necessary to remove
wheels from hub to perform wheel bearing lubrication.
FINAL ROAD TEST
17
0.8
Perform final road test giving special attention to repaired and adjusted items,
18
WHEELS AND WHEEL MOUNTING
0.2
Retorque wheel nuts only if wheel has been removed since last torquing by
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM
1. ALL LAMPS FAIL TO LIGHT
Step 1. Check for defective light switch on towing vehicle.
Replace defective switch (TM 9-2320-258-20).
Step 2. Check visually for severed cables in wiring harness. Make open circuit test (para 4-15a
).
Repair if accessible (para 4-28). Notify direct support personnel to replace
wires
buried in body of main harness.
Step 3. Check visually for bare spots in wiring harness. Make short circuit test (para 4-15b ).
Repair if accessible (para 4-28). Notify direct support personnel to replace
wires
buried in body of main harness.
2. ONE OR MORE LAMPS WILL NOT LIGHT
Step 1. Check cable connections at defective lamp.
Step 2. Check for damaged composite stoplight-taillight.
Step 3. Check for loose or broken ground wire at receptacle.
Repair or tighten ground wire. Clean frame surface at the point of ground contact.
Clean