TM 5-4930-218-14
Table 4-2. Organizational Maintenance Troubleshooting-Continued
MALFUNCTION
TEST OR INSPCTION
CORRECTIVE ACTION
WHEEL BRAKES FAIL TO APPLY WHILE VEHICLE IS BEING TOWED
Step 1. Cheek that towing vehicle applies air to trailer reservoir.
Make proper connections between towing vehicle and trailer (para 4-60c).
Step 2 Check for brake system air leaks, using soap suds.
Correct leaks, replacing parts if necessary (para 4-60).
Step 2 Check for improperly adjusted wheel breaks.
Adjust wheel brakes (para 4-65a).
Step 4. Brake master cylinder defective or out of fluid.
Service or replace brake master cylinder (para 4-64).
Step 5. Check for worn brake linings.
Replace brake shoes if linings are worn excessively (para 4-65).
Step 6. Cheek for leaking or defective wheel cylinders.
Replace defective wheel cylinders (para 4-65).
COMPRESSOR FAILS TO BUILD UP OR MAINTAIN REQUIRED PRESSURE
Step 1. Check drive belts for damage or slipping.
Adjust or replace drive belt as necessary (para 4-36).
Step 2 Check compressor pilot valve for proper adjustment.
Adjust pilot valve (para 4-44a).
Step 3. Check engine throttle control for failure to open throttle fully.
Adjust throttle control (para 4-30).
Step 4. Chock for leak in air receiver or piping.
(Correct leak or replace defective parts.
Step 5. Check for defective compressor valving.
Replace compressor (para 4-42).
ONE LUBRICANT SYSTEM FAILS TO DISPENSE LUBRICANT AT REQUIRED RATE
Step 1. Check for faulty air pressure regulator.
Repair or replace defective regulator (para 4-49).
Step 2 Check for lubricant discharge directly from pump.
Replace pump if it fails to deliver lubricant (para 4-49).
Step 3. Check for clogged hoses or piping on diacharge aide of pump with dispenser disconnected
Repair, clear, or replace defective discharge piping or hose (para 4-48).
Step 4. Check operation of lubricant dispenser.
Repair or replace defective dispenser.
WHEELS FAIL TO ROTATE OR ROTATE WITH DIFFICULTY
Step 1. Cheek' wheel bearings for inadequate lubrication or defects.
Pack or replace wheel bearings if necessary (para 4-58).
Step 2 Cheek wheel brakes for failure to release.
Repair brake system (Section XVIII).
Section VIl. RADIO INTERFERENCE SUPPRESSION
pression of the engine.
4-14. General Methods Used to Attain
Proper Suppression
4-15. Interference Suppression Com-
a. Essentially, suppression is attained by
ponents
providing a low resistance path to ground for stray
currents. Methods used include shielding the ignition
and shorts on a capacitor tester; replace defective
and high frequency wires, grounding the frame with
capacitor.
bonding straps, and using capacitors and resistors.
b. Engine. Refer to TM 5-2805-203-14 for engine
suppression components.
Section VIII. ENCLOSURE, BATTERY BOX, STORAGE
COMPARTMENTS, AND FRAME
weather and dust. Doors are provided in the enclosure
4-16. Description
to permit access to the operator controls, tool box,
a. An aluminum enclosure covers the lubricating
storage compartments, lubricant storage tanks, and
and servicing unit to provide protection from
