SECTION V. UNIT MAINTENANCE PROCEDURE

TM 5-2590-512-13&P SECTION V. UNIT MAINTENANCE PROCEDURE 4-20 Chain Replacement. This task covers: a. Removal. b. Installation. Initial Setup Tools: Equipment Conditions: General Mechanic's Tool Kit Hydraulic System Depressurized 5180-00-177-7033. Front safety cover removed (para. 4-17). Rear safety cover removed (para. 4-18) Materials and Parts: Rags. a. Removal 1. Disconnect two hydraulic hoses at quick disconnect fittings (1) at top of Auger Drive Unit (2). Use rag to catch fluid drippings. 2. Rotate chain (3) so that chain master link (4) is located between chain sprockets as shown. (Move chain by inserting leverage bar in opening in auger drive unit hex shaft (5) and turning). NOTE If resistance is felt when attempting to turn shaft, have assistant relieve residual hydraulic pressure inside Auger Drive Unit by holding open quick disconnect fittings (1). 3. Loosen four nuts (6), two lock up nuts (7), two adjusting rod bolts (8), until motor plate (9) is free to slide. Move motor plate (9) until chain (3) is loose. 4. Remove spring lock (10), keeper (11), from master link (4). Slide lower section of master link (4) down and out of adjacent links. 5. Remove chain. b. Installation. 1. Thread replacement chain around drive sprocket (12), allowing both ends of chain to meet on motor sprocket (13). 2. Insert lower master link (4), through ends of drive chain (3). Install keeper (11). 3. Install master link spring lock (10) (widest opening) over one post of master link (4) lower half. Then slide spring lock (10) over other post until seated into locked position. FOLLOW ON TASKS: Chain adjustment (see para 4-19). Install front and rear safety covers (see para. 4-17 and 4-18). Connect hydraulic hoses at quick disconnect fittings (1). Use rag to wipe up drippings and clean connections. END OF TASK. 4-21