OPERATING
BETTCHER
AIRSHIRZ
®
INSTRUCTIONS
INDUSTRIES, INC. Rev. September 24, 2016
Page 70
9.4.13.3 Dual Power Cylinder Disassembly and Repair (See Fig. #64) (Continued)
The rod bearing should be replaced if there is excessive side play in the rod, or if abrasive particles
have become embedded. The wiper and lip seal should be replaced at this time.
Remove the wiper, per above. Use a screwdriver blade against the back face of the bearing to push
the bearing out the front of the cylinder. Hand force is usually adequate.
Be careful not to gouge
the bore of the cylinder.
Remove the lip seal.
Wipe the bore clean and apply a film of Bettcher
®
Max-Z-Lube to the bore and to a new lip seal.
Install the lip seal from the front, with the lip facing the inside, until it is fully down. Set the
bearing squarely over the bore and, using a support of slightly less than ½ inch (12.7mm) diameter,
press the bearing until the outer edge is flush with the rear surface of the wiper groove, .239 inch
(6.07mm), from the surface of the cylinder housing, as shown in Figure #65.
Do not over press as
this will damage the lip seal.
Install a new wiper per instructions above.
FIGURE #65
The rod should be replaced if its surface has become rough, if the coating has worn off, or if there
are any scratches or dings on the portion that slides past the wiper. Use a 1/8 inch (3mm) diameter
rod or clevis pin inserted into the rod end bearing to act as a handle. Use a Phillips screwdriver to
remove the screw at the back of the rear piston.
