5of 10
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. For new parts
a .003-.005 inch protrusion will give a total shaft
shoulder clearance of .000-.004 inches. In units that
are worn, the shaft shoulder clearance should be
maintained by increasing the protrusion of the thrust
bearing. Protrusion of the thrust bearing in the
housing and head should be equal.
4. Press roller bearing (4) into the bearing bore, seating
it tightly.
5. Place the thrust ring (19) into the bearing bore.
6. Measure the distance from the retainer mounting
face to the thrust ring. See figure 5.
7. Measure the distance the retainer will protrude into
the bearing bore.
8. Install shims (21) to give compression interference.
See table 4 for interference amount.
9. Place the retainer seal (17), Teflon shaft seal (13)
and shaft seal cushion (12) into the retainer (18).
10. Install the retainer (18), being careful not to cut or
pinch the retainer seal (17).
11. Torque the retainer screws (25) to the proper torque. See table 2
12. IMPORTANT – Recheck the thrust bearing shoulder height. See figure 5
13. Repeat for the other bearing area.
C. Place shoulder seal cushion (16), wedge (15) and cap (14) into
its groove. Shim to proper height - See figure 6
D. Place shoe seal cushion (8) in its groove around shoe (6).
E. Place dowel pins (24) in shoe (6).
F. Cut the shoe seal cap (9) and place it over the shoe seal cushion (8). Match the radius on the shoe seal
cap (8) with the radius of the shoe (6).
G. Place shaft vane seal cushion (10) into its groove around vane on the shaft (5). Place vane seal cap (11)
on top of vane seal cushion (10). Match the radius of the shaft seal cap (11) with the radius on the vane of
the shaft (5).
H. Insert dowel pins(23) into housing(1).
I. Grease the ID of the housing (1) and, shaft (5) "A" diameter shoe surface to allow the shaft to slide into the
actuator with ease. One of the corners of the vane has a radius (see figure 3). Match the rounded corner
with the rounded corner of the ID of the housing (1).
J. Place the vane (5) at right angles to the shoe - see figure 3. Using either the installation tools (figure 2) or
shim stock to protect the seals, tuck the shoe seal and the vane seal into the body (1) and push straight in
until the vane is approximately 1/8 inch from the top of the head. While the shaft (5) is being inserted into
the body (1), pressure must be applied to the top of the vane seal to prevent it from riding upward.
K. Using either the installation tools or shim stock to protect the seals, Install the shoe (6) into housing (1).
One of the corners of the shoe (6) has a round corner. This corner goes into the housing (1). Leave the
FIGURE 2. Assembly Tools See
Table1 for Parts listing
