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.
a. Remove two (2) screws from rear cover plate and
tighten evenly top two
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.
ADJUSTING CARRIAGE BEARINGS
In proper adjustment the top and bottom radii of all 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.Rernove 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.
b.Rotate the eccentric screws a partial turn (left or rfght) as required to take up looseness.
c.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,
d.Install carriage cover.
WASHER ASSEMBLY
ECCENTRIC SCREW
CARRIAGE
CARRIAGE BEARING
PLAIN WASHER | LOCKWASHER |
NUT
29
