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Section VI. TROUBLESHOOTING - TM-10-3930-631-120031
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TM-10-3930-631-12 Truck Lift Fork EMD Solid Rubber Tired Wheels 4 000 Lbs Capacity 144 and 180 In Lift Army Model MHE 227 Manual
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Section VII. RADIO INTERFERENCE SUPPRESSION - TM-10-3930-631-120033
TM 10-3930-631-12
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. TRUCK ACCELERATES UNEVENLY AND DOES NOT INCH PROPERLY.
Step 1. Check for improperly adjusted controls.
If controls are not adjusted, notify direct and general maintenance personnel.
Step 2. Check for defective controls or panels-r
If controls are defective notify, direct and general support maintenance personnel.
3. TRUCK HAS INADEQUATE POWER FOR CLIMBING GRADES OR TRANSPORTING LOADS.
Step 1. Check for improperly adjusted or defective controls.
If controls are not adjusted or are defective, notify direct and general support personnel
Step 2. Check for defective drive motor or drive axle.
If motor or axle are defective, notify direct and general support maintenance personnel.
4. TILT LIFT AND SIDE, SHIFT SHIFT MECHANISM IS DO NOT OPERATE WHEN LEVERS ARE ACTUATED.
Step 1. Check for defective fuse.
Replace defective fuse (para 4-27).
Step 2. Check for improperly adjusted or defective pump switch.
Adjust or replace pump switch (para 4-33).
Step 3. Check for improperly adjusted or defective seat switch.
Adjust or replace seat switch (para 4-31).
Step 4. Check for burned or defective contact points or contactors.
Replace burned or defective points para 4-28) or notify direct and general support maintenance personnel to
replace defective contactor.
5. OIL LEAKING FROM RESERVOIR BREATHER.
Step 1. Check oil level in reservoir.
Drain oil from reservoir if necessary.
Step 2. Check control linkage for proper adjustment.
Adjust control linkage (para 4-53).
6. HEAD AND TAILLIGHTS DO NOT OPERATE WHEN SWITCH IS ACTUATED.
Step 1. Check for defective lamps or lights.
Replace defective lamps or lights (para 4-24).
Step 2. Check for defective light switch., i
Replace defective light switch (para 4-21).
Step 3. Check for loose or defective wiring.
Tighten loose connections or replace defective wiring.
Step 4. Check for defective fuse.
Replace defective fuse (para 4-27).
7. STOPLIGHT DOES NOT OPERATE WHEN BRAKES ARE APPLIED.
Step 1. Check for loose or defective wiring.
Tighten loose connections and replace defective wiring.
Step 2. Check for defective pressure switch.
Replace defective switch (para 4-23).
Step 3. Check for improperly adjusted or defective seat switch.
Adjust or replace seat switch (para 4-31).
Step 4. Check for defective master cylinder.
If master cylinder is defective, notify direct and general support maintenance personnel.
8. SERVICE BRAKES DRAG OR DO NOT OPERATE PROPERLY
Step 1. Check for proper pedal and linkage travel.
Adjust pedal and linkage (para 4-32).
Step 2. Check for weak or broken return spring.
Replace return spring (para 4-33).
Step 3. Check for worn or improperly fitted brake linings.
Replace brake shoes (para 4-34).
Step 4. Check for loose or worn wheel bearings.
Adjust or replace wheel bearings (para 4-37).
9. BRAKE PEDAL SOFT OR SPONGY.
Step 1. Check for air in brake hydraulic system.
Bleed system (para 4-33).
Step 2. Check oil level in master cylinder.
If oil is low, fill master cylinder (para 4-33).'
Step 3. Check for proper master cylinder operation.
Replace defective master cylinder (para 4-33).
Step 4. Check for defective wheel cylinders.
Replace defective wheel cylinder (para 4-35).
10. BRAKE PEDAL HARD TO DEPRESS.
Step 1. Check for improperly adjusted pedal or linkage.
Adjust pedal free travel (para 4-32).
4-6

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