PISTON 5421767 - Caterpillar

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Stop the engine. Install wear strip (21) and shoe (20) .Note: Note the location of shoe (20). Repeat this step for the remaining shoes.
Install bolts (19) .
Tighten setscrew (18) .
Tighten nuts (17) .
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Install wear strips (16) .
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Install shims (15) .
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Install plates (14) .
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Position bracket (13) .
Install washer (12) and bolt (11) .
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Start the engine. Operate the machine to raise circle assembly (10) off the suitable cribbing and Tooling (C). Remove Tooling (C) from circle assembly (10). Reposition the machine or the blade.
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Position shims (5) .Note: Use shims (5) to obtain a sliding fit with a maximum of 1.800 mm (0.0709 inch) clearance between the bracket and the beam.
Install shaft assembly (9) .
Install washer (6), nut (7), and cotter pin (8) .Note: Tighten nut (7) to 0.000 mm (0.0000 inch) clearance and back off one slot.
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Attach Tooling (A) and a suitable lifting device to blade (1). The weight of blade (1) is approximately 907 kg (2000 lb). Use Tooling (A) and the suitable lifting device to raise blade (1) .
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Connect hose assemblies (3). Install bolts (4) .
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Install blade tip cylinder (2).
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Remove Tooling (A) from blade (1) .
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Measure Dimension (A) between wear strip (16) and circle (10). Dimension (A) must be no greater than 0.50 mm (0.020 inch). Add or remove shims (15) to obtain the correct dimension.
Loosen bolts (19) in order to allow movement in shoes (20). Seat circle drive pinion (25) in the teeth on circle (10). Move circle (10) to obtain Dimension (C). Dimension (C) must be 50.00 + 2.50 − 0.50 mm (2.000 + 0.098 − 0.020 inch).
Loosen nuts (17). Evenly adjust setscrews (18) against shoes (20) to bring shoes (20) in contact with circle (10). Back off setscrews (18) to obtain Dimension (B). Dimension (B) must be no greater than 0.80 mm (0.032 inch).
Tighten bolts (19) to a torque of 530 70 N m (391 52 lb ft). Tighten nuts (17) to a torque of 200 30 N m (148 22 lb ft).
Start the engine and run the engine. Rotate the circle through the entire working range and check for binding. The circle must rotate freely.