Owner's manual

23.
24.
2.5.
26.
21.
Install cylinder assembly by aligning upper
cylinder head’s (8) mwnting holes with
tnmnion holes in stand assembly. Secure
cylinder in stand with tmnnion screws (7).
Attach cl&s head (3) to shaft lever with
clevis pin (2). Secure clevis pin with
retaining rings (1).
Install supply hose marked “upper” (10) to
90” elbow (9) at upper cylinder head (8).
Install supply hose marked “lower” (11) to
90” elbow at lower cylinder head (16).
Open supply air valves and check for leaks
by using a “snoop” type leak detector.
Refer to paragraph 4-2 and calibrate power
positioner stroke. Return power positioner to
service.
f. Cam. Use the following procedure to replace
cam. This pro&ore is to be used for
replacement of cam with same part number
replacement cam.
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air, signal air, and any electrical
supply or electronic signals to power
positioner. Isolate power positioner from all
systems connected to the power positioner.
Severe injury or death may result from
large torque power positioner is capable of
producing or from electrical shock.
1. Remove power positioner from service.
2. Remove lock screw (1, Figure 7-5), washer
(Z), adjustment screw (3). and washer (4)
securing cam (5) to cam hub (6). Remove
cam fmm hub.
3. Install new cam (5) on cam hub (6). Align
cam so adjustment screw hole is in center of
adjustment slot. Secure cam to cam hub with
washers (2 and 4), lock screw (I), and
adjustment screw (3). Do not tighten screws.
4. Rotate cam to make sure roller is perfectly
aligned with zero point on cam.
ITEM DESCRIPTION
1 Lock Screw
2 Washer
3 Adjustment Screw
4 Washer
5 Cam
6 Cam Hub
Figure 7-5. Cam Replacement
5. Tighten lock screw (1) and adjustment screw
(3).
6. Refer to Section IV and calibrate power
poSitiO”CX.
I. Retam power positioner to service.