TM 9-3405-205-14 & P
BELT ADJUSTMENTS(continued)
CAUTION: Make all adjustments except changing speed with the motor off. Adjust speed control handle to
increase the speed until the variable speed belt is flush with the outside diameter of the motor pulley. Set the
variable speed stop against the adjusting nut and lock in place. Put the rear cover back on.
BAND SAW ALIGNMENT
One of the most important keys to successful band sawing is the lineup of the saw. Your machine as received should be
properly lined up ready to do your sawing operations. However, if it is not lined up or because of wheel wear or wheel
replacement alignment has been disturbed, listed below are the steps to go through to realign the saw.
1. the distance from the column face to the lower wheel centerline. It should be 10-5/8". If it is not, loosen the four
mounting screws bolting the transmission to the shelf and re-position it to the above dimension. Snug the screws
down.
2. the parallelism of the lower wheel to the cross member with a combination square. It should be parallel within
1/32". Make sure also that the lower wheel is not all the way back against the shoulder on the transmission shaft.
Allow approximately 1/8" for final adjustments. Check also that the wheel clears the chip brush bracket.
3. the location of the guide bar in the upper wheel housing. It should be 20-1/8" from the column over it's entire
length. If it is not, the guide bar bracket will have to be relocated. Back off the two setscrews at the right hand
side of the bracket and then loosen four mounting screws bolting the bracket to the upper frame. The two
jackscrews in the welded ears below the bracket can be used to tip the bracket into parallelism with the column. If
the guide bar is parallel but out of location, simply slide it over to get the 20-1/8" location for the full length of the
bar. Snug down the three bracket mounting screws nearest to the adjusting jacks.
4. the location of the upper wheel centerline. It should be 10-5/8" from the column face. Readjust if necessary by
using the, opposing jackscrews in the upper wheel slide on each side of the wheel bracket. Leave enough
clearance between the screws so that the bracket can pivot freely. Remove the table from the trunnion. Note any
shims used and put the shims under the same screws when the table is reinstalled.
5. a 3/8" width blade. Check the upper guide. It should be mounted to the guide bar with a 3/16" shim. Check the
lower guide bracket. The step should face away from the front of the machine. With a long straight edge, check
for parallelism of the wheels tilting the upper wheel and moving it on its shaft to check for parallelism. Note lower
wheel may not be properly tilted causing the upper wheel to be too far back or forward. Adjust the lower wheel if
required using the setscrews in the transmission mounting feet to tilt the lower wheel. If one side of the wheels is
parallel and the other is not parallel, pivot the upper wheel housing with the jacking studs provided. Be careful not
to lose the position of the wheel centerline and post location. After paralleling the wheels, spin the wheels
clockwise and adjust the tilt to track the band in the center of both wheels. I f the band can be centered on the
upper wheel but is off center on the lower wheel, make sure the guides are not holding the band from centering. If
they are, temporarily remove them. Spin the wheels counter-clockwise. The band should track the same in both
directions if the wheels are parallel. If it does not track the same in both directions, parallelism of the wheels must
be corrected.
6. the upper guide if it was removed. Note the position of the blade relative to the wheel. If it is against the guide
backup bearing and will not allow the blade to center, the up- per wheel must be moved out. If it clears the backup
bearing, the wheel will have to be moved
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