PISTON 6Y8857 - Caterpillar

Illustration 1 g03317848
Table 1
Specification for 296-3248 Boom Cylinder Gp    
Item     Qty     Part     Specification Description    
1     1     258-8503 Bushing     Bore before assembly is 70.27 0.04 mm (2.767 0.002 inch).
Installation depth is
7.5 0.3 mm (0.30 0.01 inch).    
A     1     198-7215 Cylinder As     Bore is
105.00 0.10 mm (4.134 0.004 inch).    
B     1     296-3271 Cylinder Rod and Bearing As     Diameter is
74.93 0.03 mm (2.950 0.001 inch).    
C     1     158-6380 Head     Bore over two lands is
75.53 0.03 mm (2.974 0.001 inch).    
2     8     095-9806 Bolt     Torque to
320 40 N m (236 30 lb ft).    
3     1     258-8504 Bushing     Bore before assembly is
80.29 0.04 mm (3.161 0.002 inch).
Installation depth is
7.5 0.3 mm (0.30 0.01 inch).    
4     1     114-0750 Bushing     Out side diameter is
80.128 0.033 mm (3.1546 0.0013 inch).
Thickness is
2.475 0.025 mm (0.0974 0.0010 inch).    
5     1     170-9842 Buffer Seal     Lubricate the sealing lip lightly with the lubricant that is being sealed.    
6     1     170--9858 U-Cup Seal     Lubricate the sealing lip lightly with the lubricant that is being sealed.    
7     1     165-9284 Lip Type Seal     Lubricate the sealing lip lightly with the lubricant that is being sealed.
Before assembly, apply green Loctite 609 to wiper seal groove.    
8     1     133-6686 Special Locknut     Before assembly, lubricate the face and the thread with 309-6932 Hydraulic Oil all around.
Torque to
4000 200 N m (2950 148 lb ft).    
9     2     198-7265 Ring     Lubricate the inside diameter and the outside diameter with clean grease.    
10     1     9X-3586 Seal As     Lubricate the inside diameter and the outside diameter with clean grease.    
11     1     198-7267 Ring     Lubricate the inside diameter and the outside diameter with clean grease.    
12     1     185-9051 Seal Ring     The slit of the seal ring must turn in the direction of the piston.