320 GC, 320 and 323 Excavator Machine Systems Specifications Caterpillar

Boom Cylinder

Usage:

320 GC DKJ

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Illustration 1	g06247746
Typical example

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Table 1
Item	Qty	Part	Specification Description
1	1	240-2913 Bushing	Inside diameter before assembly is 80.20 ± 0.04 mm (3.157 ± 0.002 inch).
1	1	240-2913 Bushing	Installation depth is 10 mm (0.4 inch).
2	12	8T-1447 Bolt	Torque to 267 ± 27 N·m (197 ± 20 lb ft).
A	1	Cylinder As	Bore diameter is 120 mm (4.7 inch). ⁽¹⁾
A	1	Cylinder As	Bore diameter is 125 mm (4.9 inch). ⁽²⁾
B	1	Rod As	Diameter is 85 mm (3.3 inch). ⁽¹⁾
B	1	Rod As	Diameter is 90 mm (3.5 inch). ⁽²⁾
3	1	489-3021 Sleeve Bearing	During press fit, insert the bushing with the taper side first.
			Inside diameter before assembly is 80.36 ± 0.03 mm (3.164 ± 0.001 inch).
			Installation depth is 10 mm (0.4 inch).
4	1	3B-8489 Grease Fitting	Torque to 9.32 ± 4.90 N·m (82.49 ± 43.37 lb in).
5	1	096-4402 Bushing ⁽¹⁾	Outside diameter before assembly is 90 mm (3.5 inch).
		096-4402 Bushing ⁽¹⁾	Thickness is 2.47 mm (0.097 inch).
		105-2575 Bushing ⁽²⁾	Outside diameter before assembly is 95 mm (3.7 inch).
		105-2575 Bushing ⁽²⁾	Thickness is 2.47 mm (0.097 inch).
6	1	247-8864 Piston ⁽¹⁾	Torque to 5460 ± 546 N·m (4027 ± 403 lb ft).
6	1	283-5984 Piston ⁽²⁾	Torque to 6250 ± 625 N·m (4610 ± 461 lb ft).
7	1	096-3216 Socket Setscrew	Torque to 56.9 ± 10.7 N·m (42.0 ± 7.9 lb ft).
7	1	096-3216 Socket Setscrew	After tightening the socket setscrew, stake the socket setscrew in two places.

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⁽¹⁾	For 523-4008.
⁽²⁾	For 515-8513.

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