COLLAR-THRUST 4612891 - Caterpillar

Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Drain the hydraulic oil from the hydraulic system into a suitable container for storage or disposal. The capacity of the hydraulic system is 47.3 L (12.5 US gal).
Remove the floorplate.
Remove the plate under the seat.
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Remove steering control rod (1) .
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Disconnect hose assemblies (2) .
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Remove bolts (3). Remove valve (3A) .
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Disconnect hose assemblies (4). Remove two mounting bolts (5). Remove motor (4A) .
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Remove bolts (6) .
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Install Tooling (A) and remove housing (7) .
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Remove bolt (8) from hand rail (9). Position hand rail (9) out of the way. This will allow more room for Tooling (B) .
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Remove bolts (10). Remove bolt (11) and install Tooling (C). Remove two bolts (12) .
Remove two bolts from the top of the sprocket segment. Install Tooling (B). Adjust the hook of Tooling (B) to the maximum length.
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Remove the bolts and washers (10). Remove the bolt and washer (12). Do not remove bolt (13) .
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Attach Tooling (D) to Tooling (C) and Tooling (B).
Remove the remaining bolts (10). Separate the final drive approximately 152 mm (6.0 inch).
Release the pressure on Tooling (D). Rotate the brake housing 90 degrees in the counterclockwise direction.
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Rotating the brake housing allows pinion (14) to point forward. Rotating the brake housing will allow the final drive to swing toward the front of the machine. Rotating the brake housing will allow clearance for the ring gear to clear the machine. The weight of the final drive assembly is approximately 680 kg (1500 lb).