797 Off-Highway Truck Power Train Caterpillar

Torque Converter - Remove

Usage:

797 5YW

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	176-6545	Swivel	1
B	1U-9203	Lever Puller Hoist	1
	138-7576	Link Bracket	2
	189-0411	Shackle	2
C	189-0411	Shackle	2
D	194-7586	Pneumatic Wrench Gp	1
E	186-3390	Torque Converter Support Gp	1
E	FT-3553 ⁽¹⁾	Wheel Kit - Skid Gp	1

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⁽¹⁾	Optional Tool for maneuvering Torque Converter Support Gp in unloaded state.

Start By:

Remove the drive shaft assembly. Refer to Disassembly and Assembly, "Drive Shaft- Remove and Install".
Remove the fuel tank. Refer to Disassembly and Assembly, "Fuel Tank - 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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat^® products. Dispose of all fluids according to local regulations and mandates.

Note: Put identification marks on all hose assemblies, tube assemblies, and harness assemblies for installation purposes. Plug and cap all connections to prevent contamination.

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Illustration 1	g00571135

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Illustration 2	g00571137

Put a suitable container in position under drain (1) and drain (4) to contain the oil from torque converter (3). The capacity of torque converter (3) is approximately 568 L (150 US gal).
Remove plug (2) and plug (5) to drain the oil from torque converter (3).
Position Tooling (A) (not shown) to drain (1) and to drain (4). Drain the oil from torque converter (3).
Check O-ring seals and the components for wear or damage. Replace the components, if necessary.
Lubricate the O-ring seals lightly with the lubricant that is being sealed.
Install plug (2), plug (5), and the O-ring seals to the torque converter (3).
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Illustration 3 g00571138
Disconnect tube assembly (6) from the gear pump (7).
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Illustration 4 g00571141
Disconnect hose assembly (8) from gear pump (7).
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Illustration 5 g00571143

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Illustration 6 g00571144
Disconnect hose assembly (9) from the gear pump (10). Remove a washer and a bolt (11) from the clip. Move hose assembly (9) away from the work area.
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Illustration 7 g00571145
Disconnect hose assembly (12) from manifold (13).
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Illustration 8 g00571146
Disconnect hose assembly (15) from manifold (14).
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Illustration 9 g00571147
Disconnect hose assemblies (16), (17), and (18) from torque converter (3).
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Illustration 10 g00571148
Disconnect hose assembly (19) from filter base (20). Remove bolt (21) that secures harness assembly (22) to filter base (20).
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Illustration 11 g00571149
Remove nuts (23) and remove harness assembly (22) from switch assembly.
Remove bolts (24) and remove filter base (20) from torque converter (3).
Use a suitable lifting device (not shown) to remove filter base (20) from torque converter (3). The weight of filter base (20) is approximately 85 kg (189 lb).
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Illustration 12 g00571151
Disconnect harness assembly (25) from the manifold (26).
Disconnect harness assembly (27) from transmission input speed sensor (28).
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Illustration 13 g00571152
Remove nuts (29) from the switch assembly (30). Disconnect harness assembly (31) from the switch assembly (30).
Disconnect harness assembly (33) from switch assembly (32).
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Illustration 14 g00571174
Disconnect harness assembly (34) from liquid level sensor (35).
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Illustration 15 g00571175

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Illustration 16 g00571176
Remove tube assembly (36) from torque converter (3) and coupling (37).
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Illustration 17 g00571177
Remove bolt (38) and a clamp from the rail assembly. Remove tube assembly (39) from the rail assembly.
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Illustration 18 g00571179

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Illustration 19 g00571180
Remove tube assembly (40) from torque converter (3) and coupling (41).
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Illustration 20 g00571181
Remove hose assembly (42) from torque converter (3).
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Illustration 21 g00571182
Remove elbow (43) from manifold (14). Remove fitting (44) and fitting (45) from torque converter (3).
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Illustration 22 g00571183
Put Tooling (B) in position on torque converter (3), as shown. Secure Tooling (B) to a suitable lifting device. Remove bolts (46) that hold torque converter (3) to engine (47).
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Illustration 23 g00571185

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Illustration 24 g00571186

Note: The following step is the procedure for adding a new torque converter to the engine.
With Tooling (D), remove bolts (50). Remove bracket (49) and shims (48) from torque converter (3) and engine (47).
Note: The following step is the procedure for reusing the former torque converter.
With Tooling (D), remove bolts (50). Remove bracket (49) and shims (48) from engine (47).
Repeat Steps 28 or 29 for remaining bracket (51).
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Illustration 25 g00571187
Use Tooling (B) to remove the torque converter (3) from engine (47). The weight of torque converter (3) is approximately 2476 kg (5459 lb).
Note: Torque converter (3) may be lowered onto Tooling (E). Optional Wheel Kit may be used for maneuvering Tooling (E) in unloaded state. Wheels must be retarded prior to loading.
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Illustration 26 g00571188
Remove O-ring seal (52) from engine (47).
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Illustration 27 g00571189
Remove O-ring seal (53) and seal (54) from torque converter (3).
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Illustration 28 g00571190
Put brackets (56) in position on torque converter (3). Install bolts (55), as shown.
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Illustration 29 g00571191
Put torque converter (3) in position on a stand. Remove Tooling (B). Keep torque converter (3) in the vertical position on a stand, as shown.
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Illustration 30 g00571192
Install Tooling (C) onto shipping cover (57), as shown. Secure Tooling (C) to a suitable lifting device. Position shipping cover (57) on torque converter (3), as shown.
Install bolts (58) to secure shipping cover (57) to torque converter (3).
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Illustration 31 g00571213
Lower torque converter (3) to the horizontal storage position on a stand, as shown. Remove Tooling (C) from torque converter (3).
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Illustration 32 g00571214
Install a bolt (59) to secure torque converter (3) to a suitable stand.