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For Type 28 Mounted Wheels:
Install one Depressed Center Wheel Spacer (63) on the Arbor
against the Auto balancer Assembly.
Thread the wheel onto the Arbor.
Using the hex wrench, install the Wheel Retaining Screw (65)
in the end of the Arbor.
13. Insert a 5” (127 mm) long 3/16” hex wrench into the elongated
slot in the end of the Dead Handle (70) and into the hex recess in
the screw head.
14. Position the Handle against the Angle Arbor Housing (43) and
thread the screw into the Housing. The Handle can be attached
at either of two positions 180 degrees apart. Select the desired
position and tighten the screw to 18 ft-lb. (24.4 Nm) torque.
15. Inject approximately 5 cc of
Ingersoll Rand
No. 68 Grease into
each Grease Fitting (44).
For Model 77A25F107, 77A45W109 or 77A60W107:
Install the Lower Arbor Spring Washer (51) onto the Depressed
Center Wheel Arbor (60). Press the Arbor Lower Bearing (50) onto
the Depressed Center Wheel Arbor until it contacts the Lower
Arbor Spring Washer.
NOTICE
If the Bevel Gear (40) is worn or broken, replace both the Bevel
Gear and the Pinion as they are a matched set and cannot be
matched with other Pinions.
2. Grasp the flats of the Depressed Center Wheel Arbor in leather-
covered or copper-covered vise jaws, arbor bearing end up.
Tighten the Bevel Gear to 8.5 to 11.5 ft-lb (11.5 to 15.5 Nm)
torque.
a.
b.
c.
1.
3. Install the Bevel Gear Spacer (49).
4. Clean the threads on the Arbor; apply a film of thread locking
compound to the threads. Screw the Bevel Gear Nut (48) onto
the Arbor and tighten to 8.5 to 11.5 ft-lb (11.5 to 15.5 Nm) torque.
Remove the Arbor from the vise.
5. Grasp the Angle Arbor Housing (43) in leather-covered or copper-
covered vise jaws, angle head up. Install the Upper Bearing Spring
Washer (46) and Upper Arbor Bearing (47).
6. Add 15-18 cc of Mobilix EPO Grease on Bevel Gear Teeth and
Angle Arbor Housing.
7. If replacement of the Mounting Plate Pin (45) is necessary, press a
new pin into the Angle Arbor Housing.
8. Install the assembled Depressed Center Wheel Arbor (55) into the
Angle Arbor Housing.
9. Place the Sander Arbor Retaining Plate (52) in position on the
Angle Arbor Housing.
10. Install the Screw Lock Washers (53) and Retaining Plate Screws.
Tighten to 7.5 to 8 ft-lb (10 to 11 Nm) torque.
11. Install the Pad Mounting Kit Spacers (57) and Sanding Pad
Assembly (56).
For Model 77A25F107,
install the Wool Bonnet (58).
12. Using a 3/4” wrench to hold the arbor, install the Pad Mounting
Kit Nut (57) and tighten securely.
13. Insert a 5” (127 mm) long 3/16” hex wrench into the elongated
slot in the end of the Dead Handle (70) and into the hex recess in
the screw head.
14. Position the Handle against the Angle Arbor Housing (43) and
thread the screw into the Housing. The Handle can be attached
at either of two positions 180 degrees apart. Select the desired
position and tighten the screw to 18 ft-lb. (24.4 Nm) torque.
15. Apply approximately 5 cc of
Ingersoll Rand
No. 68 Grease into
each Grease Fitting (44).
