Filter
Top Products
MAINTENANCE
2647 01/11 Maintenance Section 5-7
© 2011 Alamo Group Inc.
MAINTENANCE
Lift Cylinder Reassembly
Note: Be careful not to damage seals and o-rings on edges or holes in cylinder tube. Inspect and remove burrs
and sharp edges if necessary before reassembly.
1. Place o-ring part of rod seal (3) into groove inside of head (5) and position it against the side of the groove
toward the cylinder tube end.
2. Press one side of the L-seal part of the rod seal (3) past its center until it touches the opposite side, then
press the two ends of this shape together as necessary to fit into the bore of the cylinder head. With the
seal compressed in this manner, and with the lips toward the cylinder tube end, push it down the bore of
the cylinder head. When it reaches the groove, allow it to expand to its original shape within the groove.
Note: Lips of seal (3) must be face inward and seal must be firmly seated in groove.
3. Install wiper seal (2) with lip of seal facing out and flush with top of cylinder head (5).
4. Place o-ring (4) in groove on outside of head (5).
5. Remove sharp edges on outer edge of the threaded end of shaft (1). Lubricate wiper seal (2) and rod seal
(3) in head and carefully slide head (5) onto shaft.
6. Place o-ring (10), piston seal (11) and piston wear ring (8) in grooves on outside of piston (9).
Note: For easier installation, place piston seal (11) in 120°F water to warm seal.
7. Slide piston (6) onto threaded end of shaft and install 3/4 elastic lock nut (10) to 100 lbs.
8. Lubricate piston wear ring (9) and piston seal (8) on piston (6), o-ring (4) on head (5), then carefully slide
piston and head into cylinder tube (11).
9. Insert wire retaining ring (12) into slot in the cylinder tube and turn cylinder head while applying pressure to
wire ring to thread it into the groove.
Note: If cylinder has a countersunk hole, hook end of retaining wire into hole and turn cylinder head 1-1/2 turns
to secure wire. End of hook may need to be ground to fit in countersunk hole.