With all of the seals installed, slide the rod guide assembly (5) onto rod (1).
Install crown piston seal (3J) onto piston (6). Install off- set rings (3H) on both sides of the crown piston seal (3J) in the large groove on the piston (6). The profile of the offset ring (3B) should mate with the lip on the crown piston seal (3J). Place the “L” shaped guide ring (3G) on the outside of each offset ring (3H). Boom cyl- inders require two additional wear rings (3K) to be installed in the two smaller grooves on the piston (6). Bucket cylinders have one wear ring.
Lightly coat rod threads with hydraulic oil and slide O- ring (3A) over threads and into groove. Completely clean threads of hydraulic oil, apply Liquid Primer 7649 and Loctite 242 to the rod threads, and thread piston
(6)onto rod (1) with the two holes in the piston orien- tated away from the rod. Torque the piston (6) to 160
Compress wear rings and piston seals and carefully insert piston and rod assembly into barrel. Use care to prevent damage while installing. Carefully screw rod guide (5) into barrel (8) using a spanner wrench, or carefully use a punch and hammer.
1.Piston rod
3A.
3B. Wiper ring
3C. Rod seal
3D.
3E.
3F. Rod guide ring
3G. Guard ring
3H. Offset ring
3J. Crown piston seal
3K. Wear ring
5.Rod guide assembly
6.Piston
8.Cylinder barrel
Figure 31. Bucket Cylinders
MAN0556 (9/21/2007) | Dealer Service 27 |
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