525B and 535B Wheel Skidders Power Train Caterpillar

Torque Converter and Transmission - Remove

Usage:

525B 3KZ

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	138-7573	Link Bracket	3
B	138-7574	Link Bracket	2
B	6V-6146	Load Leveler	1

Start By:

Remove the operator's cab. Refer to Disassembly and Assembly, RENR4344, "Cab - Remove" for the machine that is being serviced.
Remove the front drive shaft. Refer to Disassembly and Assembly, "Drive Shaft (Front) - Remove and Install" for the machine that is being serviced.
Remove the center drive shaft. Refer to Disassembly and Assembly, "Drive Shaft (Center) - Remove and Install" for the machine that is being serviced.

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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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

Drain the transmission oil into a suitable container. The capacity of the transmission is 54 L (14 US gal).
Reference: Operation and Maintenance Manual, SEBU7353, "Transmission Oil - Change"
Drain the hydraulic oil from the hydraulic tank into a suitable container. The capacity of the hydraulic tank is 62.5 L (16.5 US gal).
Reference: Operation and Maintenance Manual, SEBU7353, "Hydraulic System Oil - Change"
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Illustration 1 g00710083
Disconnect hose (1).
Disconnect four tubes (2) from the steering and decking blade valves.
Disconnect two hoses (3).
Disconnect hose (4).
Disconnect two hoses (5).
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Illustration 2 g00710197
Disconnect two electrical connectors (6) and cut the wire ties that hold the connectors.
Disconnect two hoses (8).
Remove nut (9) and bracket (10).
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Illustration 3 g00710229
Disconnect three hoses (11).
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Illustration 4 g00710238
Remove four bolts (13) and hose assembly (12).
Disconnect hose (14).
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Illustration 5 g00710247
Remove clip (15) from the bottom of the hydraulic tank.
Remove two bolts (16) and lay down plate assembly (17).
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Illustration 6 g00710286
Disconnect electrical connector (18).
Disconnect three hoses (19) from the bottom of the hydraulic tank.
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Illustration 7 g00710288
Install Tooling (A) to hydraulic tank (20) and plate (21). Attach a hoist and suitable lifting slings to Tooling (A).
Cut wire tie (22).
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Illustration 8 g00710316
Remove nut (23) and the washer from plate (21).
Remove two nuts (25) and the washers from plate (24).
Repeat Step 20 for the right side of the machine.
Use the hoist to carefully remove hydraulic tank (20) and plate (21) from the machine. The weight of the hydraulic tank and the plate as a unit is 170 kg (375 lb).
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Illustration 9 g00710396
Remove tube (26) from the transmission.
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Illustration 10 g00710549
Remove bolt (28) and the washer from the clip that secures tube (27) to the frame.
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Illustration 11 g00710365
Remove four bolts (29) and disconnect drive shaft (30).
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Illustration 12 g00710384
Remove six bolts (32) and the washers.
Use two people to carefully remove winch drive (31) from the machine. The weight of the winch drive is 27 kg (60 lb).
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Illustration 13 g00710413
Disconnect hose (33) and electrical connector (34).
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Illustration 14 g00710481
Disconnect hose (35).
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Illustration 15 g00710599
Loosen the two engine mounting bolts (36).
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Illustration 16 g00710588
Install Tooling (B) to the transmission. Attach a hoist and suitable lifting chains to Tooling (B).
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Illustration 17 g00710487
Remove four bolts (37) and guard (38).
Repeat Step 33 on the other side of the machine.
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Illustration 18 g00710490
Disconnect hose (39) and grease line (42) from the steering cylinder.
Remove bolt (40) and mount (41).
Repeat Step 35 and Step 36 on the other side of the machine.
Remove two bolts (43) and two clips (44).
Note: One bolt and one clip are not shown.
Use the hoist to lift the transmission and the torque converter until mount (45) and sleeve (46) can be removed.
Remove mount (45) and sleeve (46).
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Illustration 19 g00710615
Use the hoist to lift the transmission and the torque converter until bottom bolts (47) become accessible.
Remove two bolts (47) from bracket (48). Repeat the procedure on the opposite side of the machine.
Use the hoist to lower the transmission and the torque converter until top bolts (47) become accessible.
Remove two bolts (47) from bracket (48). Repeat the procedure on the opposite side of the machine.
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Illustration 20 g00710588
Use the hoist to lift the transmission and the engine slightly from the machine.
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Illustration 21 g00710628
Install suitable cribbing under the flywheel of the engine in order to support the engine.
Use the hoist to lower the transmission and the engine onto the machine.
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Illustration 22 g00710640
Remove twelve bolts (49) that connect the transmission to the engine.
Use the hoist to carefully remove the transmission and the torque converter from the machine. The weight of the transmission and the torque converter as a unit is 950 kg (2100 lb).