28
MAINTENANCE SECTION
2. If the Lower Arbor Bearing (34 or 54) is being
installed, it is necessary to note the identification
marks on the Lower Arbor Bearing. One side of the
Bearing has black stains or black hash marks across
the inner and outer races. Using a sleeve that contacts
the inner ring of the Lower Arbor Bearing, press the
Bearing, black stain or hash mark side leading, onto
the Arbor.
The Bevel Gear and Bevel Pinion in the next step
are specially matched sets. Some sets are color
coded for manufacturing purposes only. Only the
Gear and Pinion set furnished as a replacement
part or the same Gear and Pinion set removed
from one tool, is a matched set. A Bevel Gear from
one tool used with a Bevel Pinion from another tool
with the same color code IS NOT A MATCHED
SET. Replace these parts only as a matched set.
Failure to do so will result in unsatisfactory tool
performance and damage to the Bevel Gear and
Bevel Pinion.
3. Slide the Bevel Gear (26 or 46), geared face trailing,
onto the small threaded end of the Arbor, aligning the
integral keys or spline of the Gear with the slotted
keyways or spline in the Arbor.
4. Thoroughly clean the small threads on the Arbor
above the Bevel Gear and the threads in the Bevel
Gear Nut (33 or 53).
5. Apply a thin coat of thread–locking compound
to the threads of the Bevel Gear Nut. Thread the
Bevel Gear Nut onto the Arbor to retain the Bevel
Gear and tighten the Nut between 8 and 9 ft–lb (10.8
and 12.2 Nm) torque.
6. Form the Wick (32 or 52) into a horseshoe shape and
fully insert it into the U–shaped cavity in the Angle
Head. Make certain the Wick is positioned behind the
staking points in the Angle Head. If installing one of
the Wicks having a notch on one side, make certain
the notch enters the Housing first. Saturate the Wick
with approximately 1.5 cc of Ingersoll–Rand No. 63
Oil. Do not substitute any other oil.
7. Inject 3 cc of Ingersoll–Rand No. 67 or
Ingersoll–Rand No. 77 Grease into the Upper Arbor
Bearing and Wick cavity in the Angle Head. Do not
substitute any other grease.
8. Carefully grasp the assembled motor in copper–
covered or leather–covered vise jaws with the
Throttle Lever downward.
*
Registered trademark of ND Industries.
9. Install the motor Clamp Nut (29 or 49), threaded end
trailing, onto the motor end of the Angle Head.
Spread the Clamp Spacer (28 or 48) and install it,
beveled end trailing, onto the motor end of the Angle
Head against the Clamp Nut.
10. Position the output end of the Angle Head upward and
180 degrees opposite to the Throttle Lever and thread
the Clamp Nut onto the Motor Housing or Extension
Housing. Using the Motor Clamp Nut Wrench (70),
tighten the Nut between 20 and 25 ft–lb
(27 and 34 Nm) torque. This is a left–hand thread,
turn counterclockwise to tighten.
11. Thoroughly clean the internal threads of the Angle
Head and the threads on the Arbor Bearing Cap
(36 or 56).
12. Insert the assembled Arbor into the Angle Head, bevel
gear end first, making sure the teeth on the Bevel
Gear and Pinion mesh. Rotate the Arbor manually to
determine they are rotating smoothly.
13. Carefully apply a uniform coat of Vibra–Tite
VC3
No. 205 ** to at least the first three threads of the
Arbor Bearing Cap and allow the compound to cure
for 12 to 15 minutes.
14. Using a spanner wrench, install the Arbor Bearing
Cap and tighten it between 12 and 15 ft–lb
(16.2 and 20.3 Nm) torque. The Bearing Cap has a
left–hand thread: turn counterclockwise to install.
Assembly Instructions for All Collet Models
1.
Install the Collet (57) into the end of the Arbor (35).
2.
Using the Collet Body Wrench (65) to hold the
Arbor, thread the Collet Nut (58) onto the Arbor.
Assembly Instructions for All Wheel Models
1.
Position the Wheel Guard (59) against the face of the
Angle Housing (27 or 47) and using a 1/8” hex
wrench, install the three Guard Mounting Screws (61)
and Lock Washers (60). Tighten the Screws between
3.0 and 3.5 ft–lb (4.1 and 4.7 Nm) torque.
2.
Install the Flange Spacer (64), Wheel Flange (62),
Wheel Retaining Screw Washer (64B), wheel and
Flange Nut (63) on the Arbor. Use the Arbor Wrench
(65 or 67) to hold Arbor while tightening the Flange
Nut with the Flange Nut Wrench (68 or 69).
3.
For models ending in P945M, P945MC, P945ML,
P95M, P95MC or P95ML, install the Wheel
Retaining Screw (64A) and tighten it securely.
Summary of Contents for HA120RG4
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