TRANSMISSION - TM-10-3930-633-340019

TM 10-3930-633-34

TEST OR INSPECTION

CORRECTIVE ACTION

PROPELLER

SHAFTContinued

2. EXCESSIVE VIBRATION.

Step 1. Check for mud, road tar or other foreign material on shaft which disturbs shaft balance.

Clean and repair as required.

Step 2. Check for bent shaft.

Replace (para. 8-2).

TRANSMISSION

1. TRANSMISSION WILL NOT ENGAGE.

Step 1. Check fluid level.

Refill with proper fluid (see LO 10-3930-633-12).

Step 2. Check to see if control cable has become disconnected.

Reconnect control cable at selector or transmission.

Step 3. Perform transmission tests outlined in Chapter 7.

Repair transmission according to test results.

2. TRANSMISSION OPERATES ERRATICALLY.

Step 1. Check for low fluid level.

Refill with proper fluid (see LO 10-3930-633-12).

Step 2. Check for fluid foaming due to overfilling.

Drain level back to FULL mark on dipstick.

Step 3. Check control cable and linkage adjustment.

Adjust control cable or linkage (see Chapter 7).

Step 4. Perform transmission tests outlined in Chapter 7.

Repair transmission according to test results.

3. TRANSMISSION FLUID OVERHEATS.

Step 1. Check for dragging parking brake or service brake.

Adjust brakes to eliminate drag (see TM 10-3930-633-12).

Step 2. Check for overheated cooling system.

Perform tests and corrective actions listed under "COOLING SYSTEM."

Step 3. Check for constant, low speed, overloaded operation.

Reduce vehicle loading.

BRAKES

1. POOR BRAKE ACTION. HIGH PEDAL PRESSURE REQUIRED.

Step 1. Check fluid level in master cylinder.

Fill master cylinder reservoir to within one inch of filler neck.

Step 2. Check for leaks in vacuum line to booster.

Tighten or replace vacuum line.

Step 3. Check for grease on brake linings.

Replace defective grease seal; reline brakes (para. 9-6).

Step 4. Check for excessively worn or glazed lining.

Reline brakes (para. 9-6).

Step 5. Check for leakage in hydraulic lines to wheel cylinders or master cylinder.

Correct leaks, replace lines and fittings as required, bleed brakes (see TM 10-3930-633-12).

Step 6. Check for master cylinder leakage.

Repair master cylinder (see TM 10-3930-633-12).

Step 7. Check for leaking wheel cylinders.

Repair wheel cylinders (para. 9-6).

Step 8. Check engine vacuum (para. 6-7).

Repair cause of vacuum lees according to test results.

Step 9. Check for internal leakage in vacuum booster (para. 9-9).

Repair vacuum unit.

2. UNEVEN, NOISY, GRABBING BRAKES.

Step 1. Check for excessive dirt or dust in brake drum or lining.

Blow out with compressed air.

Check for grease seal or wheel cylinder leakage.

Step 2.

Replace grease seal (see TM 10-3930-633-12). Repair wheel cylinder(s) (para. 9-6).

Step 3. Check for out-of-round drum.

Replace out-of-round drum (para. 9-7).

Step 4. Check for excessive scoring or brake drum wear.

Turn or replace drums (para. 9-7).

Step 5. Check for warped or misaligned shoes.

Rebuild brakes using new shoes (para. 9-6).

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