SECTION V. UNIT MAINTENANCE PROCEDURE

TM 5-2590-512-13&P SECTION V. UNIT MAINTENANCE PROCEDURE 4-19 Chain Adjustment. This task covers: a. Adjustment. Initial Setup Tools: Equipment Conditions: General Mechanic's Tool Kit Front Safety Cover Removed (para. 4-17). 5180-00-177-7033 is Materials and Parts: Rags. WARNING Hydraulic pressure remaining after SEE engine is off could cause unexpected auger rotation resulting in death. Depressurize system by shutting off SEE engine and operating auger controls thru full range of motion. a. Adjustment 1. Depressurize hydraulic system. 2. Disconnect two hydraulic hoses at quick-disconnect fittings (1). Use rag to catch drippings. 3. Loosen four motor plate nuts (2). 4. Loosen two lock-up nuts (3). 5. Turn two adjusting rod nuts (4) until motor plate (5) will slide in its slots and chain (6) is loose. CAUTION The drive chain is adjusted when there is 1/8 inch slack at midpoints on both sides of sprocket. Do NOT overtighten chain. This will cause shafts and sprockets to fail and void warranty. 6. Turn adjusting rod nuts (4) until chain slack is 1/8 inch (6). Adjust both sides of motor plate (5) equally. If necessary, repeat steps until correct adjustment is attained. 7. Hold adjusting rod nut (4) and tighten lock-up nut (3) equally on both sides. 8. Tighten four motor plate nuts (2) to 63-75 Ib. ft. (88-102 N•m). Re-check for correct 1/8 inch slack in chain on both sides of sprocket. Repeat adjustment if necessary. FOLLOW ON TASKS. Install front safety cover (see para. 4-17). Connect hydraulic hoses at quick-disconnect fittings at Auger Drive Unit. Use rag to catch drippings and clean connections. END OF TASK. 4-20