TM 9-2520-246-34 Table 2-2.03. Troubleshooting MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION TRANSFER MODEL T-136-21 1. FRONT OUTPUT SHAFT WILL NOT TURN CLOCKWISE BY HAND. Check for defective sprag unit. Step 1. Disassemble transfer, clean, and inspect drive sprag assembly. (Refer to para 4-22, 4-23, and 4-25.) Step 2. Replace drive sprag assembly. (Refer to para 4-24.) Step 3. Replace related parts, gaskets, and seals as required. (Refer to para 4-23, 4-24, and 4-25.) Step 4. Replace transfer assembly. (Refer to TM 9-2320-209-20 gasoline or TM 9-2320-209-34 multifuel. ) 2. THE FRONT OUTPUT SHAFT SLIPS, GRABS, AND TURNS WHEN HOLDING THE INPUT SHAFT STATIONARY AND TRYING TO TURN THE OUTPUT SHAFT COUNTERCLOCKWISE BY HAND. Inspect for a defective or worn sprag unit. Step 1. Step 2. Step 3. Step 4. Disassemble transfer, clean, and inspect drive sprag unit and related parts. (Refer to para 4-22, 4-23, and 4-35. ) Replace drive sprag unit. (Refer to para 4-24.) Replace related parts, gaskets, and seals as required. (Refer to para 4-23, 4-24, and 4-25.) Replace transfer assembly. (Refer to TM 9-2320-209-20 gasoline or TM 9-2320-209-34 multifuel.) 3. INPUT SHAFT WILL NOT TURN BY HAND WITH TRANSFER SHIFTER SHAFT IN EITHER HIGH OR LOW RANGE WITH THE REVERSE SHIFTER SHAFT HELD IN THE REVERSE SHIFT POSITION. Check for damage to one or more gears in the transfer gear train. Step 1. Disassemble transfer and replace damaged gears. (Refer to para 4-22, 4-23, and 4-24.) Step 2. Replace related parts, gaskets, and seals as required. (Refer to para 4-23, 4-24, and 4-25.) Step 3. Replace transfer assembly. (Refer to TM 9-2320-209-20 gasoline or TM 9-2320-209-34 multifuel.) 4. FRONT OUTPUT SHAFT WILL NOT TURN BY HAND WITH TRANSFER SHIFTER SHAFT IN EITHER HIGH OR LOW RANGE WITH THE REVERSE SHIFTER SHAFT HELD IN THE REVERSE POSITION. Inspect for a defective sprag unit. Step 1. Disassemble transfer and replace sprag unit. (Refer to para 4-22, 4-23, and 4-24.) Step 2. Replace related parts, gaskets, and seals as required. (Refer to para 4-23, 4-24, and 4-25.) Step 3. Replace transfer assembly. (Refer to TM 9-2320-209-20 gasoline or TM 9-2320-209-34 multifuel.) 2-11