844K Wheel Dozer and 990K Wheel Loader Power Train Caterpillar

Parking Brake - Disassemble

Usage:

990K A9P

Disassembly Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-0074	Slide Hammer Puller Gp	1
A	8B-7557	Threaded Adapter	1

Start by:

a. Remove the Parking Brake.

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Note: Cleanliness is an important factor. Before you begin the disassembly procedure, the exterior of the components should be thoroughly cleaned to prevent dirt from entering the internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform disassembly procedures on a clean work surface. Keep components covered and protected always.

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Illustration 1	g06020169

Remove bolts (1) that are used to disengage the parking brake.
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Illustration 2 g06020171
Install bolts (1) in the three holes, as shown. Remove bolts (2) and the washers evenly.
Remove retaining plate (3) from brake housing (4).
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Illustration 3 g06020172
Remove spacers (5) from the brake housing.
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Illustration 4 g06020174
Use Tooling (A) to remove pistons (6) from the brake housing.
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Illustration 5 g06020175
Loosen bolts (7) evenly until the spring tension against brake housing (4) is released. Remove bolts (7).
Note: Note the location of bolts (7) for installation purposes.
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Illustration 6 g06020178
Use two people to remove brake housing (4) from bearing cage assembly (8). The weight of brake housing (4) is approximately 50 kg (110 lb).
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Illustration 7 g06020179
Remove lip seals (9), backup rings (10), and brake seals (11) from brake housing (4).
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Illustration 8 g06020182
Remove springs (12) and pressure plate (13).
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Illustration 9 g06020184
Remove clutch plates (14) and brake discs (15).
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Illustration 10 g06020186
Remove bolt (16) and retainer (17) from the brake shaft.
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Illustration 11 g06020188
Remove seal (18) and hub (20) from brake shaft (19).
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Illustration 12 g06020189
Use a suitable rubber mallet to tap brake shaft (19) out of the bottom side of bearing cage assembly (8).
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Illustration 13 g06020192
Remove lip seal (21), ring (22), and bearing (23) from bearing cage assembly (8).
If necessary, remove dowels (24).