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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

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Daily Electrical System Inspection
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Bettis Rack and Pinion Pneumatic Actuator RPE 4000

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Maintenance Plans for Bettis Rack and Pinion Pneumatic Actuator Model RPE 4000

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Pinion Removal

Warning: This procedure requires trained personnel with PPE!

Circlip (27) and thrust bearing (23) removed

Top pinion bearing (19) removed (for sizes 950 to 4000)

Pinion (18) removed by pushing it downwards

Backup ring (29), O-ring pinion top (21), cam (24) and cam thrust washer (25) removed (for Size 4000)

Pinion O-ring seals (21/22) and the pinion bearings (19/20) removed

Backup ring (29) removed (for Size 950 to 2500)

All removed parts discarded

Sign off on the pinion removal

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Rack / Pinion Pneumatic Actuator Maintenance

Warning: This maintenance check requires trained personnel with PPE!

Enter the number of cycles completed by the actuator

Visual inspection of the entire actuator and control system passed?

No leaks on the actuator parts under pressure?

Pneumatic connections checked for leaks?

Manual override checked and is regular?

Pneumatic filter cartridge is sound and filter bowl has been cleaned properly?

Relief valves setting checked?

Enter the power fluid supply pressure value

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End Cap Removal

1. For Double-acting actuators, do the following:

a. Remove the screws (8) and washers (10) of the end caps (6).

b. Remove the o-ring (11) and "B" port seal (2). Discard these parts.

2. For Spring-return actuators, do the following:

a. Tip: For actuators with assembly code CW, turn back the right hand limit stop screw (30) 2 full turns.

For actuators with assembly code CC, turn back the left hand limit stop screw (30) 2 full turns.

This will lower the spring force on the end cap and reduces the screw out length of the end cap screws.

b. Uniformly loosen the screws (9) of the end caps (5) 1/4-1/2 turns at a time, in sequence, as per figure 20, to relieve the pre-load of the springs.

c. Remove the o-rings (11) and "B" port seals (2). Discard these parts.

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Actuator From The Valve Removal

Disconnect all air supply hoses (Ports A and B or solenoid)

Disconnect all electrical wirings of the switch box

Disconnect the electrical wiring of the solenoid valve

Remove the bolts and nuts from the valve flange

Remove the bracket from the actuator

Remove the switch box and solenoid valve

Upload a photo of the disassembled actuator

Sign off on the actuator removal

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