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PM-PTR/LTR-C
Rotary Actuator Division
Wadsworth, Ohio 44281
October 27, 1993
PTR/LTR Series Actuators
Maintenance Instructions & Parts List
Provide Model Number and Serial Number When Ordering Spare Parts.
The PTR/LTR Series Actuators will provide superior performance in heavy duty pneumatic and medium duty
hydraulic applications. The new PTR Series "Wear-Tek" and LTR Series "Wear-Pak" piston sealing
configurations and anti-friction ball bearings are used to guarantee low breakaway pressure and eliminate
erratic motion at low speeds.
In the event that maintenance is required, the following steps should be used as a guide. It is recommended
that a suitable oil or O-ring lubrication compatible with the operating media, such as Parker Lube-A-Cyl, be
used on all seals and mating parts to facilitate assembly.
A. Inspection & Replacement of Piston Seal, #10, Wear Rings, #15, and O-Ring End Cap, #12.
1. Remove Tie Rod Nuts, #17 from Tie Rods,#8.
2. Pull End Cap, #16 free from Cylinder Tube, #14.
3. Pull CylinderTube, #14 free from Housing, #13.
4. Push Piston, #11 free from Cylinder Tube, #14.
5. Inspect and/or replace Piston Seal, #10, Wear Rings, #15, and O-Ring End Cap, #12.
6. Inspect and/or replace O-Ring Cylinder, #7 (for LTR Models only).
7. Re-assemble as shown in figure and torque Tie Rod Nuts, #17 per Torque Table.
B. Inspection & Replacement of Bearing, #2.
1. Remove Retaining Ring, #1.
2. Press Pinion, #3, and Bearing #2 from housing, #13.
3. Press Bearing, #2 free from Pinion, #3.
4. Inspect or replace Bearing, #2.
5. Press new Bearing, #2 into Housing, #13.
6. Replace Pinion, #3 into Housing, #13.
7. Press remaining new Bearing, #2 onto Pinion, #3.
8. Replace Retaining Ring, #1.
NOTE:
Prior to assembly of an LTR Series actuator, the rack and pinion are coated with a molycoat GN paste
and a moly grease containing a minimum MSO
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content of 3%, such as Texaco Molytex EP2.
The PTR Series actuator's rack, pinion and seals are coated with Parker Lube-A-Cyl prior to assembly.
Add lubrication as required.
