Installation and Maintenance Manual
56
6. Force the shim pack into the space between the worn bearing (A) and the square post.
If the gap between the inner tube and the bearings (both portions A and B) remains higher than
0.020-inches, loosen the screws that secure portion B and force equal-sized shim packets
between bearing (B) and the outer post.
IMPORTANT:
Keep the bearings centered and
maintain a consistent gap around the diameter of
the inner tube. Another way to measure for
consistent gap tolerance is shown in the
illustration. If the distance between the outside of
the post and the outside diameter of the tube
equals ¾-inch (19mm) and the bearings are
centered, a consistent gap should exist around
the inner tube. It is likely that the gap is within the
needed 0.020 tolerance.
7. Re-tighten the screws to secure the re-shimmed
bearings.
8. Remove the block from the gate.
9. Turn the power back on.
10. Open the gate to access and shim the lower
bearing.
11. Repeat steps 2 through 10 for the lower bearing.
Replacing the Bearings
To replace the bearings, you need to order the replacement part kit. You may want to order replacement
fasteners as well. You will need eight cap screws per bearing.
Part #
Name
Description
MX001718
SwingRiser Bearing and Shim Kit,
Includes upper and lower post bearings and 16
Upper & Lower
shims. This kit can be used on operators
manufactured from 2/2008 to the present.
MX001089
Nickel-plated cap screws
Replacement fasteners. If needed, order eight cap
(
⅜ x 16 x 1-inch)
screws per bearing.
NOTE
: If you are working on a SwingRiser manufactured prior to January 2008, refer to the Technical
Bulletin:
SwingRiser Maintenance
– Bearing Replacement and Shimming
.
¾" (19mm)
¾" (19mm)
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