TM 5-3895-346-14
ROLLER MAINTENANCE
Removal and Replacement of R.H. Eccentric Shaft Bearing
Removal - To remove the R.H. eccentric shaft bearing, remove the hubcap and frame suspension assemblies
from both bearing journals. Remove the L.H. eccentric bearing and housing as previously described under
Removal and Replacement of L.H. Eccentric Shaft Bearing. Remove the L.H. oil slinger plate from the
eccentric shaft. Unbolt the R.H. bearing housing from the roll and install the eccentric shaft and bearing
housing aligning tool to prevent possible damage to the shaft seal. This tool consists basically of two tools: a
flanged stub shaft which bolts to the end of the eccentric shaft and a counterbored aligning plate which slips
over the end of the outside diameter of the bearing housing journal. The aligning plate also has a capped length
of tubing long enough to press the eccentric bearing housing onto the eccentric bearing in the reassembly
process. Prints of these two tools, VRF-1039A and VRF-1039B, may be obtained from Tampo on special
request.
Next, screw the pipe tool VRG-610 into the L.H. end of the eccentric shaft until the pipe is firmly seated against
the end of the shaft. Unbolt the R.H. eccentric bearing housing from the roll and, with two hoists and slings,
slide the housing and eccentric shaft only far enough out of the roll head to replace the sling with a chain and
bolts through two holes in the top of the eccentric bearing housing flange to prevent excessive load on the stub
trunnion shaft. Remove the R.H. bearing housing and eccentric shaft from the roll.
The R.H. eccentric bearing is held on the shaft by means of a bearing locknut, so the housing must actually be
pressed off of the bearing outer race before the bearing can be removed from the shaft.
Remove the bolts from the bearing retainer plate and the four setscrew plugs from the face of the bearing
housing. Replace the setscrews with four 3/4 NC x 8 heat-treated, square- head setscrews and jack the bearing
out of the housing. The bearing may now be simply removed from the shaft after re- moving the locknut and
lockwasher.
Replacement - To replace the R.H. eccentric shaft bearing, first install the oil slinger plate onto the shaft if
removed. Then place the bearing retainer ring and bearing backup ring on the shaft before installing the bear-
ing. The bearing should be tightened against the backup ring with the bearing locknut as tight as reasonably
possible and then locked with the bearing lockwasher.
The eccentric shaft assembly (as described above) must now be placed vertically in a press. In order not to put
any thrust load on the oil slinger plate (item 3), the assembly must be supported with two bars (approximately 2
inches square x 22 inches long), placed between the oil slinger plate and the bearing retainer plate (when
raised and aligned against the bearing outer race). In order to support the assembly with the oil slinger plate
above the press crossmembers, two more bars of the required size must be placed crossways under each end
of the first two bars.
Before pressing the VRF-138 eccentric bearing housing on the eccentric bearing, the stub shaft part of the
aligning tool, (VRF-1039A) must be bolted to the end of the eccentric shaft. The eccentric bearing housing may
now be placed over the stub shaft part of the aligning tool and down onto the eccentric bearing. Next, place the
VRF-1039B part of the aligning and pressing tool down over the stub shaft part of the aligning tool and the end
of the eccentric bearing housing stub journal
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