TK741, TK751 and TK752 Track Feller Bunchers Machine Systems Caterpillar

Swing Drive - Disassemble

Usage:

Disassembly Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	138-7573	Link Bracket	2
B	1U-8221	Nylon Sling	1
C	5P-5197	Pliers	1

Start By:

Remove the swing drive. Refer to Disassembly and Assembly, "Swing Drive - Remove".

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

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Illustration 1	g00518369

Position the swing drive on suitable cribbing, as shown. The weight of the swing drive is approximately 281 kg (620 lb).

Put an alignment mark on the cover and the housing of the swing drive for assembly purposes.

Remove bolts (1) and cover (2) .

Fasten Tooling (A) to cover (2) .

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Illustration 2	g00518372

Fasten a suitable lifting device to Tooling (A), as shown. Carefully remove cover (2) from the ring gear of the swing drive.

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Illustration 3	g00518397

Use two people in order to remove carrier assembly (3). The weight of carrier assembly (3) is approximately 23 kg (50 lb).

Use the following procedure to disassemble carrier assembly (3) .
1. Remove sun gear (4) from carrier assembly (3) .
1. Drive spring pin (6) into planetary shaft (5) with a hammer and a punch.
1. Remove planetary shaft (5), thrust washers (9), and planetary gear (7) from the carrier assembly.
1. Remove bearing (8) from planetary gear (7) .
1. Remove spring pin (6) from planetary shaft (5) with a hammer and a punch.
1. Repeat Steps 7.a through 7.e in order to remove the other three planetary gears from the carrier assembly.
1. Remove retaining ring (10) with a screwdriver. Remove gear (11) from carrier assembly (3) .
1. Remove retaining ring (12) from gear (11) .

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Illustration 8	g00518551

Remove retaining ring (15) that holds carrier assembly (13) in position.

Remove spacer (14) from carrier assembly (13) .

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Illustration 9	g00518552

Slide a piece of steel bar stock between the planetary gears in carrier assembly (13), as shown. Make sure that the steel bar stock is centered in the carrier assembly. Fasten Tooling (B) and a suitable lifting device to the steel bar stock, as shown. Slowly lift carrier assembly (13) from the swing drive housing. The weight of carrier assembly (13) is approximately 39 kg (86 lb).

Use the following procedure to disassemble carrier assembly (13) .
1. Drive spring pin (16) into planetary shaft (17) with a hammer and a punch.
1. Remove planetary shaft (17), thrust washers (20), and planetary gear (18) from the carrier assembly.
1. Remove bearings (19) from planetary gear (18) .
1. Remove spring pin (16) from planetary shaft (17) with a hammer and a punch.
1. Repeat Steps 11.a through 11.d in order to remove the other three planetary gears from the carrier assembly.

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Illustration 12	g00518581

Use two people in order to remove ring gear (21) from the swing drive housing. The weight of the ring gear is approximately 39 kg (86 lb).

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Illustration 13	g00518589

Use Tooling (C) in order to remove retaining ring (22) .

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Illustration 14	g00518595

Loosen, but do not remove bolts (23) that secure cage (24) to the swing drive housing.

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Illustration 15	g00518604

Place swing drive housing (25) in a press, as shown. The combined weight of the swing drive housing, the pinion shaft, and the bearing cage is approximately 136 kg (300 lb).

Place a suitable cribbing directly under the pinion shaft in order to prevent the pinion shaft from falling when cage (24) is pressed out of the swing drive housing.

Put an alignment mark on cage (24) and the swing drive housing for assembly purposes.

Remove bolts (23) that secure cage (24) to the swing drive housing. Carefully press cage (24) and the pinion shaft as a unit out of swing drive housing (25) .

Fasten Tooling (A) and a suitable lifting device to swing drive housing (25). Remove the swing drive housing from the press. The weight of swing drive housing (25) is approximately 86 kg (190 lb).

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Illustration 16	g00518611

Place pinion shaft (28) with cage (24), bearing (29), and spacer (27) in a suitable press, as shown. To prevent breakage of the cage, support the cage, as shown. The combined weight of the pinion shaft, cage, bearing, and spacer is approximately 50 kg (110 lb).