Sterlco 2016C (Former Compact Series) - Manual (Page 45)

COT-C Series Hot Oil Portable Temperature Control Units Page 45
Installation of Carbon Graphite Bushings
When installing carbon graphite bushings, extreme care must be
taken to prevent breaking. Carbon graphite is a brittle material and
easily cracked. If cracked, the bushing will quickly disintegrate.
Using a lubricant and adding a chamfer on the bushing and the
mating part will help in installation. The additional precautions
listed below must be followed for proper installation:
1. A press must be used for installation.
2. Be certain bushing is started straight.
3. Do not stop pressing operation until bushing is in proper
position. Starting and stopping will result in a cracked bushing.
4. Check bushing for cracks after installation.
Carbon graphite bushings with extra interference fits are
frequently furnished for high temperature operation. These
bushings must be installed by a shrink fit.
1. Heat bracket or idler to 750°F.
2. Install cool bushings with a press.
3. If facilities are not available to reach 750°F. temperature, it is
possible to install with 450°F. temperature; however, the lower
the temperature, the greater the possibility of cracking the
bushing.