To Replace the Rod Seals

5/8" Diameter Rods
Remove any rod clevis or jam nut from the piston rod end(20). Remove the bushing screws (3), and slide the bushing (21) over the piston rod. Insert a new U-cup (4), bearing (2), and wiper (1) into a new bushing (21).

Install the new bushing assembly over the piston rod, taking care in passing it over the threaded part of the piston rod. Install new bushing screws and tighten firmly.

1" and Larger Diameter Rods
Disassemble as above, except remove the U-cup (4) from the front head. Install a new U-cup over the rod, taking care in passing it over the threaded part of the rod. Install new bushing screws and tighten firmly

To Replace the Piston Seals

Remove the front head (24) by unscrewing four tie rod nuts (22), removing the lock washers (23) and lifting the front head off the cylinder tube (7). Remove the piston rod/cylinder tube assembly from the rear head (17) and pull the piston rod assembly from the tube (7). Remove the piston U-cups (11 & 13), and the piston bearing strip (12).

IMPORTANT: Install new U-cups, making sure that the lips of the seals face away from each other.

Use grease to hold the new bearing strip (12) in place, and insert the piston rod assembly back into the cylinder tube.

NOTE: It may be necessary to temporarily compress the first piston U-cup to allow it to enter the tube. Make sure the bearing strip is not pinched between the tube and piston.

Install new cylinder tube seals (6) into the heads, and reinstall the cylinder tube. This is best done in the vertical position, with the blind end cover down. Make sure the tie rod nuts (22) and lockwashers (23) are installed on the short threaded end of the tie rods. Retighten the tie rods using equal torque on each rod per the chart below.

Bore Size	Torque
1", 1 1/2"	8-10 ft.lbs.
2", 2 1/2", 3 1/4"	15-19 ft.lbs.
4", 5"	22-25 ft.lbs.
6", 8"	70-75 ft.lbs