321C LCR Excavator Machine Systems Caterpillar

Undercarriage Frame - Install

Usage:

321C DAX

Installation 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
E	1U-8846	Gasket Sealant	-
F		Loctite C5A Copper Anti-Seize Compound	-

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

Thoroughly clean the mating surfaces of the upper structure and the undercarriage frame.
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Illustration 1 g00994615
Install a suitable towing device onto undercarriage frame assembly (18). Use a suitable towing device and position undercarriage frame assembly (18) under the upper structure. The weight of undercarriage frame assembly (11) is approximately 9525 kg (21000 lb).
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Illustration 2 g01013310

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Illustration 3 g01013309
Apply a coat of Tooling (E) on the mating surface of the swing gear. Apply a coat of Tooling (E) on the mating surface of the bearing of the undercarriage frame assembly. Use Tooling (C), Tooling (D), and Tooling (B) to lower the upper structure onto the undercarriage frame assembly.
Remove guide studs (17).
Apply Tooling (F) on the threads of bolts (16). Install bolts (16). Tighten bolts (16) to a torque of 274 ± 30 N·m (202 ± 22 lb ft). Turn bolts (16) an additional 60°. Connect tube assembly (15).
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Illustration 4 g01013297
Install bolts (9).
Install tee (13). Connect hose assemblies (12) and (14).
Connect hose assemblies (8) and install split flanges (10) and bolts (11).
Connect hose assemblies (6) and (7).
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Illustration 5 g06348221
Remove Tooling (C) and Tooling (D) from the machine. Refer to Tool Operating Manual, NEHS1328, "Lift Groups (Stand - 60 Ton)" for more information on Tooling (F).
Connect the tracks.
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Illustration 6 g01013279
Remove Tooling (A).
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Illustration 7 g01013276
Install right hand boom cylinder (5). Refer to Disassembly and Assembly, "Boom Cylinder - Remove and Install".
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Illustration 8 g01013287
Start the machine and raise the boom. Remove Tooling (B) from the stick.
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Illustration 9 g00567245
Remove bolts (2) and cover (3) from each final drive.
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Illustration 10 g00567247
Install sun gear (4) in each final drive.
Thoroughly clean the mating surfaces of the ring gear and cover (3). Apply a bead of Tooling (E) around the machined surface of the ring gear. Position cover (3) in the original position on the ring gear.
Apply Tooling (F) on the threads of bolts (2) which hold cover (3) in position. Install bolts (2) and the washers that hold the cover.
Fill each final drive with oil to the correct level. Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities". Refer to Operation and Maintenance Manual, "Final Drive Oil Level - Check".