320D and 323D Excavators Machine System Specifications Caterpillar

Boom Cylinder

Usage:

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Illustration 1	g02754816

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Table 1
Specification for 242-6764 Boom Cylinder Gp
Item	Qty	Part	Specification Description
1	1	241-7379 Bushing	During the press fit, insert the bushing in the cap assembly with the tapered side first. Bore of the bushing before installation is 80.120 ± 0.020 mm (3.1543 ± 0.0008 inch). Installation depth of the bushing in the cap assembly is 9.85 ± 0.30 mm (0.388 ± 0.012 inch).
1	1	241-7379 Bushing
2	1	-	Before assembly, lubricate the face and thread of the special locknut with hydraulic oil. Torque to 5900 ± 300 N·m (4352 ± 221 lb ft).
3	2	158-9063 Ring	Lubricate the inside diameter and the outside diameter of rings with clean grease.
4	1	9X-3592 Seal As	Lubricate the inside diameter and the outside diameter of the seal with clean grease.
5	1	179-9674 Ring	Lubricate the inside diameter and the outside diameter of ring with clean grease.
A	1	158-9062 Piston	Outside diameter of the piston over two lands is 118.90 ± 0.03 mm (4.681 ± 0.001 inch).
B	1	247-8739 Cylinder As	Bore of the cylinder assembly is 120.00 ± 0.10 mm (4.724 ± 0.004 inch).
C	1	247-8741 Rod As	Diameter of the rod is 84.93 ± 0.03 mm (3.344 ± 0.001 inch).
D	1	126-2043 Head	Bore of head over two lands is 85.63 ± 0.03 mm (3.371 ± 0.001 inch).
6	During press fit, insert the bushing in the cap assembly with the tapered side first. Bushing is one of the following part numbers:
	1	241-7380 Bushing	Bore of the bushing before installation is 80.120 ± 0.020 mm (3.1543 ± 0.0008 inch). Installation depth of the bushing in the cap assembly is 10.0 ± 0.3 mm (0.39 ± 0.01 inch).
	1	240-2913 Bushing	Bore of the bushing before installation is 80.20 ± 0.04 mm (3.157 ± 0.002 inch). Installation depth of the bushing in the cap assembly is 10.0 ± 0.3 mm (0.39 ± 0.01 inch).
7	1	247-8789 Seal Ring	The slit of the seal ring must turn in the direction of the piston.
8	1	114-0756 Bushing	Outside diameter before assembly is 90.133 ± 0.033 mm (3.549 ± 0.001 inch). Thickness is 2.475 ± 0.025 mm (0.0974 ± 0.0019inch).
9	1	170-9844 Buffer Seal	Lubricate the sealing lip of the buffer seal lightly with the lubricant that is being sealed.
10	1	170-9860 U-Cup Seal	Lubricate the sealing lip of the U-cup seal lightly with the lubricant that is being sealed.
11	1	165-9286 Lip Type Seal	Lubricate the sealing lip of the lip type seal lightly with the lubricant that is being sealed.
12	-	-	Apply green Loctite 609 to the wiper seal groove before assembly.