TM-9-2520-246-34

TRANSMISSION MODEL 3052, NSN 2520-00-347-4520

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL

MAY 1978
TM-9-2520-246-34

  TM-9-2520-246-34 - Page 29 of 153

TM 9-2520-246-34
Table 2-2.04. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
POWER TAKEOFF MODELS WN-7-28 AND WND-7-28
1. GREASE OR LUBRICANT LEAKS.
Inspect power takeoff for leaking seals and gaskets.
Step 1. Replace seals. (Refer to para 5-6, 5-7, 5-16, and 5-17.)
Step 2. Replace gaskets. (Refer to para 5-6, 5-7, 5-16, and 5-17.)
2. FAULTY OPERATION, POOR ENGAGEMENT, OR NO ENGAGEMENT.
Test 1.
Test 2.
Test 3.
Test 4.
Test 5.
Test 6.
Test 7.
Test 8.
Check input gear for breaks, cracks, missing pieces, and stripped or missing gear teeth.
Step 1. Replace input gear. (Refer to para 5-6c and 5-7i.)
Step 2. Overhaul power takeoff, as required. (Refer to para 5-6, 5-7, 5-16, and 5-17.)
Inspect shifter shaft fork for breaks, cracks, twists, and broken-out sections.
Step 1. Replace shifter shaft fork. (Refer to para 5-6b and 5-7j.)
Step 2. Replace shifter shaft. (Refer to para 5-6b and 5-7j.)
Check for loose shifter shaft fork setscrew.
Step 1. Tighten shifter shaft fork setscrew. (Refer to para 5-6b and 5-7j.)
Step 2. Install safety wire on setscrew. (Refer to para 5-6b and 5-7j.)
Step 3. Replace shifter shaft fork setscrew and safety wire. (Refer to para 5-6b and 5-7j.)
Check output and reverse shaft rear bearing cap for breaks, cracks. broken-out sections,
and distortion.
Replace output and reverse shaft rear bearing cap. (Refer to para 5-6d and 5-7h.)
inspect front bearing cap for breaks, cracks, broken-out sections, and distortion.
Replace front bearing cap. (Refer to para 5-6e and 5-7g.)
Inspect all bearings for galling, binding, chipped balls, and missing balls.
Replace front and rear bearings. (Refer to para 5-6 and 5-7.)
Check all gears for breaks, cracks, missing teeth, and missing sections.
Replace gear(s). (Refer to para 5-6 and 5-7.)
Check power takeoff case for breaks, cracks, stripped threads, missing threads, broken pieces, and
broken-out sections.
Replace power takeoff case. (Refer to para 5-6, 5-7, 5-16, and 5-17.)
2-12


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