SECTION V. UNIT MAINTENANCE PROCEDURE
4-20 Chain Replacement.
This task covers:
General Mechanic's Tool Kit
Hydraulic System Depressurized
Front safety cover removed (para. 4-17).
Rear safety cover removed (para. 4-18)
Materials and Parts:
Disconnect two hydraulic hoses at quick
disconnect fittings (1) at top of Auger Drive
Unit (2). Use rag to catch fluid drippings.
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).
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).
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.
Remove spring lock (10), keeper (11), from
master link (4). Slide lower section of
master link (4) down and out of adjacent
Thread replacement chain around drive sprocket (12), allowing both ends of chain to meet on motor sprocket
Insert lower master link (4), through ends of drive chain (3). Install keeper (11).
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.