Bimba Pneu-Tur Rotary Actuators - Manual (Page 2)

Assembly Notes
Piston seals are replaced by stretching over the piston and snapping into the piston groove. Seal
lips face the applied pressure.
Bumpers are stretched over and snapped onto the retaining groove on the end of the piston.
The angle adjustment thread pressure seal can be replaced by first threading the screw inward past
the seal. (The screw cannot be removed from the head.) The seal is then removed using a pick instru-
ment. A new seal is worked into the groove and then the screw is backed out to the desired rotation
limiting position. The lock nut secures the screw and activates the seal.
The yellow dots on the piston magnets are installed in the piston grooves facing towards the shaft.
The cushion seal located in the tube end cap head and the cushion adjusting screw and seal are
NOT repairable. They are furnished installed in a new cylinder body assembly.
When fitting a new rear shaft bearing, an arbor press is required to remove the worn bearing and to
seat the new bearing.
When installing the racks, be sure to maintain the same position (twin rack units) and “end for end”
orientation. This will assure being able to re-establish the original alignment of shaft key relative to
unit rotation. The ends of replacement racks are coded “A, B, C, or D” identifying the tube they match
with. (See diagram)
Cylinder body assemblies may not be interchangeable, maintain original position (A, B, C, or D – see
diagram) at re-assembly. The heads of replacement cylinder body assemblies are coded “A, B, C,
or D” to assure correct placement.
Double Rack Model
3/4" Bore Model Ball Bearing
(R Option)
9/16", 1-1/16", 2" Bore
Models
Standard Shaft
Single Rack Model
Repair Parts
No. Part Description No. Part Description
PT-1
PT-2
PT-3
PT-4
PT-5
PT-6
PT-7
PT-8
PT-9
PT-10
Actuator Body
Shaft/Piston Assembly
Front Shaft Bearing
Rear Shaft Bearing
Shaft Woodruff Key
Piston/Rack Assembly (includes
Rack, Poll Pins and two Pistons)
Rack Support
Piston Seal (Double Quantity for Oil
Service)
Piston Wear Ring (required for
Oil Service only)
Magnet
PT-11
PT-12
PT-13
PT-14
PT-15
PT-16
PT-17
PT-18
PT-19
PT-20
PT-21
Bumper
Bearing Retainer Set Screw
Cylinder Body Assembly (includes
Body, End Cap, and Retainer Ring)
Cylinder Body Retainer Cap Screw
Cylinder Body Thread Seal
Cylinder Body Thread Seal Ring
Cylinder Body Jam Nut
Angle Adjustment Screw
Retaining Ring
Shim Package
Shaft Spacers
Bimba Manufacturing Company
Monee, IL 60449-0068
TEL: 708/534-8544 • FAX: 708/235-2014
Support: 1-800-44-BIMBA
Visit our website at: www.bimba.com Form PTRI-102