Table of Contents
Advertisement
MDT2
TOP BEARING REPLACEMENT
Replacement of the top bearing
The MDT2 top bearing is a unique design. It is
two bearings in one: a flat thrust bearing and a
roller bearing.
The bearing will separate if not installed
properly. Do not attempt to install it unless it is
secured as described in these instructions.
1. Carefully clean out the breaker, removing any
debris or dirt. If using a new breaker, skip this step.
2. Separate the flat-bearing & thrust washer from
the new roller bearing.
Thrust Washer
Not Shown
3. The bearing's inner race must be supported
during installation. Make an insertion tool. Use a
5/16 - 18 x 3" bolt, a ¾" copper coupling, two or
three washers (one must be less than ¾" OD to go
inside the breaker) and two nuts to hold it together:
5/16" bolt
Flat Washer
Flat bearing
Large Flat
Washer
Roller Bearing
·
Place copper coupling onto top of bearing
·
Place large washers over coupling and small
washer under bottom of bearing.
·
Insert bolt through large washers, coupling and
bearing. Run one nut into bearing to center the
bolt. Add small washer and nuit. Tighten nut
finger tight.
May 2002
Page 24
Nut for
centering
Nut for
tightening
Construction of Bearing Insertion Tool
¾" copper
coupling
Roller
Bearing
Flat
washer
Hide quick links:
Advertisement
Table of Contents
