Scotchman FI-8510-20M, Manual

Page: 73 / 100

PAGE 70
8.5 SEAL REPLACEMENT - CYLINDER
For parts identification, REFER TO FIGURE 30 ON THE FOLLOWING PAGE.
1. After removing the cylinder from the machine, lay it on its side, with the ports down, and allow
the hydraulic fluid to drain.
2. After the fluid drains, clamp the cylinder in a vise or similar holding device.
3. The cylinder head (A) is threaded into the cylinder tube. There are pin holes in the top of the head
for a pin wrench.
4. To remove the head, place a pin wrench in the pin hole on the head and rotate the head
counterclockwise.
5. After the head has been removed, anchor the cylinder to a floor anchor, or something similar, and
hook a come-along to the cylinder clevis and pull the head and ram out of the tube.
6. Remove the locking nut from the cylinder shaft and slide the piston and head off of the shaft and
remove all seals.
7. Clean all of the parts and inspect the inside of the tube, the piston, the shaft and the inside of the
head for scoring or nicks.
8. Install the new seals and lubricate them before re-assembling the parts.
9. Place the head and piston on the shaft and torque the locking nut on the shaft to 100 foot pounds.
10. Stand the cylinder tube upright in a vise and place the shaft assembly on the tube.
11. Turn the head back into the tube with the pin wrench.