M312 Excavator Machine System Caterpillar

Boom Cylinder

Usage:

M312 6TL

Show/hide table




Illustration 1	g03396333

Show/hide table

Table 1
Specification for 120-6311 Variable Adjustable Boom Cylinder Gp
Item	Qty	Part	Specification Description
1	1	117-9434 Bushing	Bore diameter before assembly is 70.23 ± 0.02 mm (2.765 ± 0.001 inch).
1	1	117-9434 Bushing	Installation depth is 7.5 ± 0.5 mm (0.30 ± 0.02 inch).
A	1	120-6300 Cylinder As	Bore diameter is 130.000 to 130.063 mm (5.1181 to 5.1206 inch).
2	1	120-6301 Head	Bore over two lands is 70.53 ± 0.03 mm (2.777 ± 0.001 inch).
B	1	120-6299 Rod As	Diameter is 69.93 ± 0.03 mm (2.753 ± 0.001 inch).
3	1	128-7656 Bushing	Bore diameter before assembly is 70.23 ± 0.02 mm (2.765 ± 0.001 inch).
3	1	128-7656 Bushing	Installation depth is 7.5 ± 0.5 mm (0.30 ± 0.02 inch).
4	1	095-1267 Socket Setscrew	A hole must be drilled for each assembly.
4	1	095-1267 Socket Setscrew	The material at hole edge must be driven back to lock the setscrew.
5	2	179-9771 Ring	Lubricate the inside diameter and the outside diameter with clean grease.
6	1	9X-3595 Seal As	Lubricate the inside diameter and the outside diameter with clean grease.
7	1	150-5884 Ring	Lubricate the inside diameter and the outside diameter with clean grease.
8	1	183-8994 Piston	Before assembly, apply 309-6932 Hydraulic Oil to the face and threads.
8	1	183-8994 Piston	Torque to 800 ± 80 N·m (590 ± 59 lb ft).
9	1	170-9841 Buffer Seal	Lubricate the sealing lip lightly with the lubricant that is being sealed.
10	1	170-9857 U-Cup Seal	Lubricate the sealing lip lightly with the lubricant that is being sealed.
11	1	165-9283 Lip Type Seal	Lubricate the sealing lip lightly with the lubricant that is being sealed.
11	1	165-9283 Lip Type Seal	Before assembly, apply green Loctite 609 to the wiper seal grooves.