Controlled Products Systems Group HRG 220-A ST - Manual (Page 71)

Installation and Maintenance Manual
57
Important aspects to consider when you are replacing
bearings:
Locate the weld seam inside the square post. It
should run along the side that is attached to the
gate hinges. The notched portion of the bearing
half must be installed so that the notch aligns
with the weld seam. If the weld seam is not
evident inside the post, place the bearing so the
notch is on the hinge side.
Shims are inserted at the factory with 0.0 to
0.020-inch clearance in relation to the post.
Replacement bearings need to be shimmed to a
similar clearance.
When installing new bearings, use an equal
number of shim packets on opposite sides. The
packets may be composed of 0.060 and 0.020
shims.
Always start with a .060‖ shim on each of the
four outside edges when installing a new
rectangular bearing.
To replace the bearings, take the following steps:
NOTE: Refer to SwingRiser Bearings Chart to
determine what replacement kit you need to order.
1. To access the upper bearing, close the gate.
2. Turn off the gate operator’s power source. This
ensures that the gate will not move while you
are installing the bearings.
3. Use a jack screw to lift and block the gate
panel. This transfers the weight off the
bearings.
4. Loosen the post screws and remove any shims
surrounding the bearings.
¾" (19mm)
Weld
seam
location
Shims
Bearing
half
Hinge
Inner tube
Bearing half
Shim Post
Weld seam ¼ -20
cap
screw
holes
Hinge
¾" (19mm)