18
MAINTENANCE SECTION
Always wear eye protection when operating or
performing maintenance on this tool.
Always turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting
any accessory on this tool, or before performing any
maintenance on this tool.
DISASSEMBLY
General Instructions
1.
Do not disassemble the tool any further than neces-
sary to replace or repair damaged parts.
2.
When grasping a tool or part in a vise, always use the
surface of the part or tool and help prevent distortion.
This is particularly true of threaded members and
housings.
3.
Do not remove any part which is a press fit in or on a
subassembly unless the removal of that part is neces-
sary for repairs or replacement.
4.
Do not disassemble the tool unless you have a com-
plete set of new gaskets and O–rings for replacement.
5.
Do not press any needle bearing from a part unless
you have a new needle bearing on hand for installa-
tion. Needle bearings are always damaged during the
removal process.
Disassembly of the Sanding Arm
1.
For 18” models, slide the Cover (35B) rearward to-
ward the handle of the Sander until it is free. It may
require a light rap on the front edge of the Cover to
disengage it from its locking points.
2.
Using the Guard Clamp Screw Wrench (50), loosen
the Guard Clamp Screw (35) and remove the Guard
(34) and assembled sanding arm from the Angle
Housing (22).
3. Using a screwdriver, remove the two Clevis Mounting
Screws (37) and separate the Clevis (36) from the
Guard.
4.
For 12” x 1/2” and 18” x 1/2” models, use a screw-
driver, to remove the two Belt Plate Retaining Screws
(40), two Belt Plate Spacers (41) and the Belt Plate
(39).
5.
If the Belt Pad (38) must be replaced, peel the Pad
from the side of the Clevis or Yoke (42) and scrape
the surfaces clean.
6.
To separate the Yoke from the Clevis, press the Yoke
Retaining Pin (44) out of the Yoke and Clevis with an
arbor press.
Be careful not to allow the compression of the Yoke
Spring (43) to expel the Yoke or Clevis in an unsafe
manner when the pressing plug is withdrawn from
the Yoke.
7.
Press the Idler Wheel Shaft (49) out of the Yoke and
Idler Wheel (45).
8.
The Idler Wheel contains an Idler Wheel Bearing (47)
at each end. Simultaneously press both Bearings out
of the Wheel.
Disassembly of the Angle Head
1.
Grasp the tool in leather–covered or copper–covered
vise jaws with the Spindle Cap (32) upward. Using
the Collet Body Wrench (50) on the flats of the Arbor
(31), unscrew the Spindle Cap. If the Drive Sleeve
(33) needs replacement, cut the old one from the
Spindle Cap.
2.
Using the Arbor Bearing Cap Wrench (53), unscrew
and remove the Arbor Bearing Cap (30). This is a
left–hand thread. Rotate the Cap Wrench clockwise
to remove the Cap.
3.
Using the Clamp Nut Wrench (52), loosen the Clamp
Nut (24) and pull the Angle Housing Assembly (22)
away from the Motor Housing (5). This is a left–hand
thread. Rotate the Nut Wrench clockwise to loosen
the Nut.
Do not allow the Angle Head to rotate when sepa-
rating it from the Motor. Components may fall
from the Angle Head.
4.
Grasp the Arbor and pull the assembled Arbor out of
the Angle Head. If the Wick (27) needs replacement,
pull it out of the Angle Housing.
5.
If the Upper Arbor Bearing (26) needs replacement,
place the Angle Head on the table of an arbor press,
arbor end down, and press the Bearing out of the
Angle Head.
