AIR CYLINDER ASSEMBLY NOT DISENGAGING.

TM 9-2520-246-34

Table 2-2.02. Troubleshooting (Continued)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 5. Inspect clutch shifter shaft fork for breaks, cracks, twists, broken out sections, and bends. (Refer to

Replace clutch shifter shaft fork.

Test 6. Check for loose shifter fork setscrew.

Step 1. Tighten loose shifter fork setscrew. (Refer to para 4-5h and 4-8j.)

Step 2. Install safety wire on shifter fork setscrew. (Refer to para 4-5h and 4-8j.)

Step 3. Replace shifter fork, setscrew, and safety wire. (Refer to para 4-5h and 4-8j.)

Test 7. Inspect output sliding clutch for roughness, cracks, breaks and broken out pieces.

Replace output sliding clutch. (Refer to para 4-5h and 4-8j.)

Test 8. Check driving clutch for cracks, breaks, distortion and broken-out pieces.

(Refer to para 4-5h and 5-8j.)

Replace driving clutch.

Test 9. Check clutch driving setscrew for looseness.

Step 1. Tighten clutch driving setscrew. (Refer to para 4-5h and 4-8j.)

Step 2. Install safety wire on clutch driving setscrew. (Refer to para 4-5h and 4-8j.)

Step 3. Replace setscrew and safety wire. (Refer to para 4-5h and 4-8j.)

5. AIR CYLINDER ASSEMBLY NOT DISENGAGING.

Test 1. Check for foreign material lodged in air cylinder.

Remove, clean, and replace air cylinder. (Refer to para 4-5e and 4-8m.)

Test 2. Inspect clutch shaft shifter fork for cracks, breaks, distortion, and missing pieces.

Replace clutch shaft shifter fork. (Refer to para 4-5h and 4-8j.)

Test 3. Inspect shifter fork setscrew for looseness.

Step 1. Tighten setscrew. (Refer to para 4-5h and 4-8j.)

Step 2. Install safety wire on setscrew. (Refer to para 4-5h and 4-8j.)

Step 3. Replace setscrew and safety wire. (Refer to para 4-5h and 4-8j.)

Test 4. Check shifter shaft compression spring for broken coil(s), distortion, breaks, cracks, or

missing coil(s).

Replace spring. (Refer to para 4-5h and 4-8j.)

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