Hoffman Mechatronics
Bridgeport Mill J1 Rebuild
Drive Housing Bolts
Alignment Pin
Alignment Pin
Back Gear Shifter
Figure 9 - Bolts Fastening Drive Housing Together
3.3.2 Drive Housing Inspection
There are several sets of bearings in the drive housing that should be inspected prior to placing
the drive housing back in service. Two sets of these bearings are shown in Figure 10 below. The
Spindle Bull Gear Bearings are located beneath the Spindle Bull Gear Assembly. To remove the
Bull Gear Bearings you will have to remove the Bull Gear Assembly by removing the spanner
nut located on the opposite side and the circlip that retains the bearings in the housing. The Back
Gear Bearings are located one in each of the gear casings. To remove the Back Gear Bearing
from the lower casing you will need a slide hammer puller much like those used for pilot
bushings.
Back Gear
Bearing
Spindle Bull
Gear Bearings
Figure 10 - Drive Housing Inspection
BPJ1RBLD_002
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January 31, 201111
