824H Wheel Dozer, 825H Soil Compactor and 826H Landfill Compactor Machine Systems Caterpillar

Front Frame from Rear Frame - Separate

Usage:

824H ASX

Separation Procedure

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Table 1
Required Tools
Tool	Part Number	Description	Qty
A	504-9791	Lift Gp (60Hz)⁽¹⁾	1
	OR
	504-9793	Lift Gp (50Hz)⁽²⁾	1
B	439-3940	Link Bracket	2
C	439-5575	Hydraulic Jack	1
D	180-3033	Repair Stand Set	2
E	8S-7621	Tube	2
F	283-1495	Stand	2
G	1P-1836	Bearing Puller Adapter	1
	6V-2108	Sleeve	1
	9U-6832	Nut	1
	4C-9634	Puller Stud	1
	6V-3175	Double Acting Cylinder	1
	350-7768	Electric Hydraulic Pump Gp	1
H	350-7768	Electric Hydraulic Pump Gp	1
	4C-9634	Puller Stud	1
	6V-3175	Hydraulic Puller	1
	7H-7539	Full Nut	1
	5P-7399	Bearing Puller Adapter	1
	8M-4858	Adapter	1
	1M-6756	Sleeve	1
	7F-5283	Head	1
J	350-7768	Electric Hydraulic Pump Gp	1
	4C-9634	Puller Stud	1
	1P-1837	Bearing Puller Adapter	1
	6V-3175	Hydraulic Puller	1
	6V-4035	Sleeve	1
	7H-7539	Full Nut	1

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⁽¹⁾	High-Voltage (480v) Low-Voltage (240V)
⁽²⁾	High-Voltage (400V) Low-Voltage (200V)

Start By:

Release the hydraulic system oil pressure. Refer to Disassembly and Assembly, "System Pressure - Release".
Remove the center drive shaft. Refer to Power Train, "Drive Shaft (Center) - Remove and Install".

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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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Illustration 1	g06303326

Install Tooling (A) under the front frame, as shown. Refer to Tool Operating Manual, NEHS1303, "Lift Group (Stand - 25 Ton)" for more information on Tooling (A).
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Illustration 2 g01081984
Disconnect hose (1). Remove bolts (2) and remove the rear wiper arm (3).
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Illustration 3 g01081985
Remove the front mounting bolts (4) for the cab.
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Illustration 4 g01081990
Install Tooling (B) to the front of cab, as shown. Attach a suitable lifting device to Tooling (B) and raise the front of the cab.
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Illustration 5 g01081993
Remove the cab mount. Install a 76 mm (3 inch) block of wood (5) on both sides of the cab. Rest the cab on wood blocks (5).
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Illustration 6 g01082000
Remove bolts (6) and remove strip (7). Pull mat (8) toward the rear of the cab.
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Illustration 7 g01082005
Disconnect harness assembly (9). Remove clamp (10). Remove bolt (11). Use Tooling (C) (not shown) to remove pin (12) from the upper hitch.
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Illustration 8 g01082013
Remove bolts (13) and the washers from the rod end of both steering cylinders. Use Tooling (C) (not shown) to remove the pins (not shown) from the rod end of the steering cylinders.
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Illustration 9 g01082022
Disconnect hose assemblies (14) that connect the front frame to the rear frame.
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Illustration 10 g01082049
Remove bolt (15). Disconnect steering shaft (16).
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Illustration 11 g01082040
Install blocks (17) between the rear axle and the frame to prevent the rear axle from oscillating.
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Illustration 12 g01082051
Attach a suitable lift truck to the rear frame, as shown. Use a chain (18) to connect the rear frame to the lift truck, as shown.
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Illustration 13 g01082057

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Illustration 14 g01082454
Remove bolts (21) and (24). Remove plate (23) and shims (22). Use Tooling (C) to remove lower pin assembly (19). Remove spacer (20).
Raise the cab and remove the wood blocks that were installed in step 5. Lower the cab and install the cab mounting bolts that were removed in step 3. Leave the suitable lifting device connected to the top of the cab.
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Illustration 15 g01082066

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Illustration 16 g01082081
Use the suitable lifting device to apply slight upward pressure to the cab. Use the suitable lifting device that is connected to the cab and the lift truck to slowly separate rear frame (25) from the front frame. Support the front of rear frame (25) on Tooling (D), as shown. Support the rear of the rear frame (25) by using Tooling (E) and (F).
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Illustration 17 g01082349
Remove the upper sleeve bearings (26) in the rear frame by using Tooling (G).
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Illustration 18 g01082370

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Illustration 19 g01082413
Remove bolts (27). Remove caps (28) and (36). Remove shims (30). Remove seals (29) and (35) from caps (28) and (36).
Use Tooling (J) to remove the upper hitch bearings (31), (32), (33), and (34).
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Illustration 20 g01082407

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Illustration 21 g01082390
Remove spacer (38). Remove bolts (37). Remove caps (39) and (47). Remove shims (36). Remove seals (41) and (48) from caps (39) and (47).
Use Tooling (H) to remove the lower hitch bearings (42), (43), (44), and (45).