784C and 785C Off-Highway Truck Power Train Caterpillar

Rear Wheel, Bearing, and Duo-Cone Seal - Remove

Usage:

785C 1HW

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	138-7574	Link Bracket	2
B	128-4775	Bracket	1
B	128-4776	Extension Assembly	1
C	149-7173	Bracket	1

Start By:

Remove the final drive. Refer to Disassembly and Assembly, "Final 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, "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.

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Personal injury can result from hydraulic oil pressure and hot oil.
Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.

Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

Note: Newer machines do not use retaining pins with the wheel bearings therefore steps pertaining to retaining rings may be omitted.

Note: Cleanliness is an important factor. Before the removal procedure, clean the exterior of the component.

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Illustration 1	g00563003

Install Tooling (A) to rear wheel (1) . Attach Tooling (A) to a suitable lifting device and a hoist.
Note: A lift truck can be positioned under rear wheel (1) in order to support rear wheel (1) during removal of the retainer.

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Illustration 2	g00563009

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Illustration 3	g00563012

Use a suitable lift truck in order to support retainer (3) . Remove ten bolts (2) and the hard washers in order to remove retainer (3) and shims (4) . Discard ten bolts (2) . Use a suitable lift truck in order to remove retainer (3) .

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Illustration 4	g00563014

Attach Tooling (B) to a suitable hoist. Use two 0S-1585 Bolts in order to install Tooling (B) to hub (5) .

Use Tooling (B) in order to remove hub (5) . The weight of hub (5) is 78.3 kg (172.6 lb).

Remove two 0S-1585 Bolts in order to remove Tooling (B) from hub (5) . Remove Tooling (B) from the hoist.

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Illustration 5	g00563017

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Illustration 6	g00563020

Use a suitable lift truck in order to remove special cone (6) . The weight of special cone (6) is 59 kg (130 lb).

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Illustration 7	g00563003

Remove rear wheel (1) from the spindle. The weight of rear wheel (1) is 1097 kg (2418 lb).

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Illustration 8	g00563022

Remove one half of Duo-Cone seal (7) from rear wheel (1) .

Inspect two special cups (8) . If necessary, remove two special cups (8) from rear wheel (1) .

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Illustration 9	g00563024

Remove retaining pin (10) from spindle assembly (9) .

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Illustration 10	g00558380

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Illustration 11	g00563025

Attach Tool (C) to a suitable hoist. Use Tool (C) in order to remove special cone (11) from spindle assembly (9) . The weight of special cone (11) is 59 kg (130 lb).