321C LCR Excavator Machine Systems Caterpillar

Undercarriage Frame - Remove

Usage:

321C DAX

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	228-4532	Link Assembly	1
B	277-7200	Electric Hydraulic Pump Gp	1
	8S-7645	Hydraulic Jack Hose Gp	1
	396-9840	Hydraulic Cylinder	1
	4C-6486	Stand	1
	8S-7631	Tube	1
	8S-7615	Pin	2
	8S-7625	Collar	1
	8S-8048	Saddle	1
C	FT-1134	Beam Assembly	1
D	504-9826	Lift Gp (50/60 Hz)⁽¹⁾	2
	OR
	504-9827	Lift Gp (50/60 Hz)⁽²⁾	2

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⁽¹⁾	High-Voltage (380-500V)
⁽²⁾	Low-Voltage (180-300V)

Start By:

Remove the bucket.

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NOTICE

Failure to follow the recommended procedure or the specified tooling that is required for the procedure could result in damage to components. To avoid component damage, follow the recommended procedure using the recommended tools.

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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, PERJ1017, "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	g00567245

Position the machine on a hard, level surface. Position drain plug (1) for each final drive , as shown. Drain the oil from each final drive into a suitable container for storage or disposal. The capacity of each final drive is 10 L (2.6 US gal).
The following procedure removes the sun gear from a typical final drive. A different final drive may require a slightly different procedure to remove the sun gear.
1. Remove bolts (2) and cover (3) from each final drive.
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  Illustration 2 g00567247
  
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  Without the sun gear in place, the brakes are ineffective. Personal injury or death could result. Provide other means to hold or stop the machine.
2. Remove sun gear (4) from each final drive.
3. Temporarily reinstall cover (3) on each final drive.
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Illustration 3 g01013276
Remove right hand boom cylinder (5). Refer to Disassembly and Assembly, "Boom Cylinder - Remove and Install".
Start the machine. Fully extend the stick cylinder. Raise or lower the boom until the center of the pin bore for the bucket is approximately the same height as the bottom of the counterweight.
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Illustration 4 g01013279
Adjust the length of Tooling (A). Install the bolts, the washers, and the nuts that hold Tooling (A) together. Tighten the bolts to a torque of 360 ± 50 N·m (266 ± 37 lb ft). Install Tooling (A) in place of the right hand boom cylinder.
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Illustration 5 g01013287
Install Tooling (B) under the stick.
Separate the tracks. Refer to Disassembly and Assembly, "Track - Separate".
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Illustration 6 g01013297
Disconnect hose assemblies (6) and (7).
Remove bolts (11) and split flanges (10). Reposition hose assemblies (8).
Disconnect hose assemblies (12) and (13). Remove tee (13) to provide clearance.
Remove bolts (9).
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Illustration 7 g06348221
Position Tooling (C) and Tooling (D) under the machine. Refer to Tool Operating Manual, NEHS1328, "Lift Groups (Stand - 60 Ton)" for more information on Tooling (D).
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Illustration 8 g01013309

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Illustration 9 g01013310
Disconnect tube assembly (15). Remove two of bolts (10). Install two guide studs (17) for installation purposes.
Remove the remainder of bolts (16).
Use Tooling (C) and (D) to raise the upper structure off the undercarriage. Raise the upper structure until the upper structure is above the swivel joint . Adjust the height of Tooling (B) to keep the upper structure level. The weight of the upper structure is approximately 14515 kg (32000 lb).
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Illustration 10 g01013311
Install a suitable towing device onto undercarriage frame assembly (18). Use a suitable towing device and slowly pull undercarriage frame assembly (18) away from the upper structure. The weight of undercarriage frame assembly (18) is approximately 9525 kg (21000 lb).