Adjusting Base To Column - DeWalt DW1251 Adjustment And Operating Instructions

4.5 Adjusting Base
to Column
Note: From time to time, you may find that there is a
build-up of dust in the arm tracks or on the
bearings - especially after ripping. To maintain
accuracy and ease of operation, it will be
necessary to clear this dust. This can be done as
follows:
(i) Remove the arm end-cap.
(ii) The yoke assembly will then come out at the end of
the arm.
With a clean, dry cloth wipe the arm tracks along
their entire length to remove all dust and grease
(Fig. 21).
With a vacuum cleaner and cloth, clean off all dust
on the 3 bearings of the yoke assembly. White spirit
can be used if necessary to remove compacted dust.
(v) Remount the yoke assembly in the arm tracks and
replace the arm end cap, making sure all retaining
screws are tightly secured.
CAUTION: Never attempt to lubricate the surface of
these bearings or the arm tracks, as this can
cause premature wear and inaccuracy.
The following adjustment will also normally be
unnecessary unless your Powershop has been moved
frequently from site to site.
If. after, the mitre latch is engaged in the 0° straight cross-
cut position and the mitre clamp is secured, there is still
side, or up-and-down, movement at the front end of the
arm caused by the column moving in its base, the
following adjustment is necessary:
(i) Loosen the lock nuts (U in Fig. 22) on the 2 brass
alien screws on the left of the base (looking from the
rear) and then slacken the inner brass screws with
an alien key.
(ii) Turn the elevating handle to move the column up and
down. If base is seen to be slack around the column,
adjust by unscrewing the two nuts W (Fig. 22a) until
the correct fit has been achieved. Avoid binding by
overtightening.
If the base is too tight around the column, adjust by
unscrewing nuts (X) and tightening nuts (W) for
correct fit.
(iii) Retighten the brass screws against the key on the
back of the column and set the lock nuts to hold
them in position.
CAUTION: After carrying out this adjustment, check
again the straight cross-cut travel is at 90°
to the fence - and adjust if necessary.
Fig. 22
Fig. 22a