794 AC Off-Highway Truck Machine Systems Caterpillar

Front Wheel, Bearing and Duo-Cone Seal - Remove

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	439-3943	Link Bracket As	3
	217-9903⁽¹⁾	Washer	3
	8C-4032⁽²⁾	Nut	3
B	195-3175	Bearing Handler	1
C	422-1785	Lifting Eye Assembly	3
D	8S-0933	Eye Bolt	2

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⁽¹⁾	Rim Mounting Hardware
⁽²⁾	Rim Mounting Hardware

Start By:

Remove the front wheel and brake

Refer to Operation and Maintenance Manual, "Front Wheel Oil - Change" for the correct draining and filling procedures.
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Illustration 1 g03896024
Remove bolts (1) and cover assembly (2).
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Illustration 2 g06155556
Remove O-ring seal (3).
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Illustration 3 g06155550
Remove bolts (4), plate (5), and cover (6) from cover assembly (2).
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Illustration 4 g06155558
Remove O-ring seals (7) from cover assembly (2).
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Illustration 5 g06155560
Remove target sensor assembly (8) from cover assembly (2).
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Illustration 6 g06160412
Remove O-ring seal (9) from target sensor assembly (8).
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Illustration 7 g06160419

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Illustration 8 g06160379
Remove bolts (10). Use two people or a suitable lifting device to remove retainer assembly (11). The weight of retainer (11) is approximately 30 kg (66 lb). Remove shims (12).
Use Tooling (A) and a suitable lifting device to remove wheel assembly (14) and bearing cone (13). The weight of wheel assembly (14) is approximately 1194 kg (2632 lb).
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Illustration 9 g06160426
Remove O-ring seal (15) from retainer assembly (11).
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Illustration 10 g06160429
Remove bolts (16) and remove speed sensor assembly (17) from retainer assembly (11).
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Illustration 11 g06160432
Disconnect harness assembly (18) and remove O-ring seal (19) from speed sensor assembly (17).
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Illustration 12 g06160437
Remove bolts (20) to remove receptacle (21) from speed sensor assembly (17).
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Illustration 13 g06160440
Remove bearing cup (22).
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Illustration 14 g06160442
Remove Duo - Cone seals (23). Remove bearing cup (24).
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Illustration 15 g06160447
Remove Duo - Cone seals (25).
Note: The inner Duo - Cone seal can be removed after the service brake is removed for easier access.
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Illustration 16 g06160455

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Illustration 17 g06160456
Install Tooling (C) at three equally spaced locations onto service brake assembly (26). The weight of service brake assembly (26) is approximately 1581 kg (3486 lb).
Note: The bolt of Tooling (C) must be cut to a length of 90 mm (3.5 inch)
Remove 40 nuts (27) and 10 nuts (28).
Remove service brake (26) from the wheel spindle.
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Illustration 18 g06160459
Remove O-ring seal (29) from service brake (26).
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Illustration 19 g06160461
Raise the temperature of bearing cone (30), rapidly and evenly, to 42° C (75° F) above ambient temperature. Use Tooling (B) to remove bearing cone (30). The weight of bearing cone (30) is approximately 67 kg (148 lb).
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Illustration 20 g06160465

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Illustration 21 g06160473
Remove bolts (31). Install Tooling (D) at two locations that are 180° apart. Use Tooling (D) and a suitable lifting device to remove retainer (32). The weight of retainer (32) is approximately 53 kg (117 lb).
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Illustration 22 g06160475
Remove O-ring seal (33) from retainer (32).