Owner's manual

Maintenance
Size New clearance inches Replace at inches (millimeters)
(millimeters)
1½ x 3-10 0.060 - 0.070 (1.52 - 1.78) 0.094 (2.4)
2 x 3-10
3 x 4-10H
3 x 4-10G
4 x 6-10
Radial bearing
• Inspect the bearings for cracks or chips.
• Inspect the diametric bearing clearances:
New clearance in inches Replace at inches
(millimeters) (millimeters)
Shaft to bearing 0.003 - 0.006 (0.076 - 0.152) 0.012 (0.305)
Reverse and impeller thrust bearings
Inspect these bearings for cracks, chips, or scoring. If the minimum groove height is less than
the minimum height recommended, then replace.
Figure 35: 0.020 in. (0.051 cm) minimum groove height
Stationary shaft
Make sure the stationary shaft is free from cracks and scoring.
Containment shell
• The containment shell must be free from scratches or cracks.
• Replace the containment shell when grooves are in excess of 0.01 in. (0.25 mm) for the
outside diameter and 0.030 in. (0.75 mm) for the inside diameter.
• Make sure that the shaft fits snugly in the containment shell.
Magnet assembly
WARNING:
The magnets in this unit are extremely powerful. Beware of serious injury to fingers and hands. Keep
magnetic drive components and magnetic tools apart by a minimum of 3 ft (1 m).
The magnets are extremely brittle. It is normal to have chips (up to 10% of the magnet surface)
per MMPA standard no. 0100-90.
• Make sure that magnets are free of major cracks that extend over 50% of the surface and
are free of imperfections that create loose particles.
3298 Family Installation, Operation, and Maintenance Manual 63