Sears 113.19771 - Manual (Page 29)

adjustments^ to compensate for wear
ARM TO COLUMN
1. With the arm control lever unlocked and in index
release position, the arm should move firmly with no
vertical play in the arm.
The arm should fit snugly on the column. If not, then
adjust.
d. Remove two (21 screws from rear cover plate and
tighten evenly top two 3/8-1B bolts, until arm
moves firmly and there is no vertical or horizontal
movement in the arm when arm control lever is
locked or unlocked.
b. Bottom two nuts should be snugged evenly, but not
nearly as tight as top two bolts.
c.
Re-Install Rear Cover Plate.
3/8-16 BOLTS
ADJUSTING CARRIAGE BEARINGS
In proper adjustment the top and bottom radii of ail four
bearings should be in contact with the arm tracks for their
entire length and carriage should roll freely but with some
resistance.
To test for looseness between bearings and tracks on radial
arm, perform the following steps.
1. Remove left-hand carriage cover.
2. Push the carriage to its full most rearward position.
3. Finger hold front carriage bearing as shown and apply
as much force as possible and at the same time pull
carriage
forward. If you can stop the bearing from
turning it will require adjusting.
4. Check rear bearing in the same manner and adjust as
follows:
a. Loosen nuts just enough to permit the eccentric
screws to turn.
Rotate the eccentric screws a partial turn (left or
right) as required to take up looseness.
Hold the heads of eccentric screws in the position
established in the preceding step and tighten nuts
on underside of carriage. Correct adjustment exists
when you cannot keep the bearings from turning.
However, excessive bearing pressure will cause
difficult operation and rapid wear,
Install carriage cover.
WASHER ASSEMBLY
b.
d.