"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications March 2008
Page 1-23
Cylinder Assembly
CAUTION:
• To insure a quality repair, cylinder parts must be thoroughly cleaned, dry, and free of
solvents, and assembly must be performed in a clean area free of dust and
contamination.
• To avoid cutting the seals, do not use sharp edged tools during seal replacement. After
installing seals allow at least one hour for the seals to restore to their original shape
before assembling the cylinder.
• Torque all hardware according to the
Hydraulic Components Torque Table
unless
otherwise specified.
1. Lubricate all components with clean hydraulic fluid.
2. Install new seal kit components. Install all seals on the head and piston using the non-
sharp seal tool.
3. Place a small amount of oil on the inside seals of the head and reinstall it on the shaft, by
slipping head over the piston end of the shaft being very careful not to damage the inside
seals.
4. Place a small amount of oil on the inside seals of the piston and reinstall it on the shaft by
slowly twisting the piston on over the threads of the shaft being very careful not to dam-
age the inside seals.
5. Reinstall the shaft nut; torque 1 ½” nut to 160 ft.-lbs.
6. Grease the outside seals of the head and piston.
7. Reinstall the shaft into the barrel of the cylinder and push in until groove of the head lines
up with the slot in the barrel.
17. Reinstall the cylinder retainer. Installation is reverse of removal.
18. Cycle the cylinder using air to check for proper operation.
NOTE: It is very important to keep all parts clean when working with hydraulic cylinders,
even one small piece of dirt or grit can damage the cylinder.
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