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Repair of Rotac
OVERHAUL INSTRUCTIONS
Read the entire contents of these instructions before installing the actuator and before
making any connections to the actuator. These instructions must be followed in all
respects to avoid damage to the actuator and associated components and/or injury to
personnel.
26R Model
For further information contact:
Micromatic/Subsidiary of Textron Inc.
525 Berne Street
Berne, Indiana 46711
Phone: 219/589-2136 Fax: 219/589-8966
actuators@tac.textron.com
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Actuators
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Table of Contents
Summary of Contents for Rotac 26R
- Page 1 Repair of Rotac Actuators ® 26R Model OVERHAUL INSTRUCTIONS Read the entire contents of these instructions before installing the actuator and before making any connections to the actuator. These instructions must be followed in all respects to avoid damage to the actuator and associated components and/or injury to personnel.
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Page 2: R-124
® PURPOSE: To instruct designated personnel in the teardown, inspection, seal replacement and the reassembly of Rotac® Rotary Actuators. Minor repairs will be examined; however, repairs without proper engineering information and machine capabilities may be costly. These cases call for factory service and should be referred to the factory for repair. -
Page 3: Housing
C. Metal particles - Metal chips can be found from valve spools, Rotac internal parts and other metal ® components in the system. The appearance of symptoms a, b, or c above, will require total flushing and cleaning of the entire system. -
Page 4: Head/
Oversize or elongated shoe dowels may have been caused by the vane of the shaft contacting the shoe. Inspect the shaft at vane weld area for cracks and the shoe dowel holes for cracks. b. Oversize body dowel holes may be caused by racking and twisting Rotac . This may be a sign ®... -
Page 5: Shaft
3. Adjust shims (21) at the thrust bearing (3) shoulder until a .003-.005 inch height is obtained. See figure 5 Note: If the shaft assembly thrust area is worn, the position of the thrust bearing (6) may have to be adjusted to compensate for the wear. -
Page 6: Shoe
Position #2 (Vane Seal approximately opposite the shoe). Table 1. Assembly Tool Kits for 26R Models Includes the Shoe Seal Protector, the Vane Seal Protector and the Shaft Seal Proctor. Assembly numbers available on request. 6 of... -
Page 7: Internal By-Pass Leakage: Leakage Checks To Be Made At A Gauge Pressure As Listed. Air Pressure To
INTERNAL BY-PASS LEAKAGE: Leakage checks to be made at a gauge pressure as listed. Air pressure to be maintained at pressure listed for one (1) full minute before check is started. BREAKAWAY PRESSURE: Rotation of a Rotac actuator output shaft must be accomplished by an internal ®... - Page 8 Figure 4 - Parts List Drawing Item Description Item Description Housing Seal Shoulder Cap Head Seal Shoulder Wedge Bearing Thrust Seal Shoulder Cushion Bearing Roller Seal Retainer Shaft Retainer Bearing Shoe Thrust Ring Seal, Head Shims Shoulder Seal Area Seal, Shoe Cushion Shims Bearing Area Seal Shoe Cap Screw Head...
- Page 9 Figure 5 - Thrust Bearing 9 of...
- Page 10 Figure 6 -Shoulder seal 26R-2 26R-5 26R-10 26R-17 26R-31 26R-62 26R-124 .024-.029 .037-.042 .037-.042 .058-.063 .058-.063 .081-.087 .081-.087 Dimension 1. Place half of the shoulder seal shim set in the bottom of the seal groove. 2. Place the shoulder seal cushion into the groove. (Make sure that the cushion is seated in the bottom of the groove.
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