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d. Press the other Planet Gear Shaft (71) into the hole
opposite the tapered shaft hole in the gear head
until it is flush with the face of the gear head.
e. Press the Gear Frame Bearing (70) onto the gear
head end of the Arbor (39).
f. Install the Internal Gear (72) over the gear head
end of the Arbor (39), making sure the splines of
the Internal Gear mesh with the planet gear teeth.
g. Lubricate the Gearing liberally with Ingersoll–
Rand Lubricant No. 68 and install the assembled
Arbor into the Arbor Housing (22).
In the following step, make sure the Lever (17) on
the Throttle Handle (1) aligns with the I–R logo on
the exterior of the Arbor Housing (22).
17. Slide the assembled Throttle Handle (1) into the Arbor
Housing (22).
For Wire Brush Machines, make sure the spline on
the Rotor (28) properly engages the spline in the
Rotor Pinion (69).
18. Grasp the Arbor Housing in a vise, air inlet up.
19. Clean the Coupling Nut (21) threads and carefully
apply a uniform coat of Vibra–TiteR** VC3 No. 205
to at least the first three threads. Allow the Vibra–Tite
to cure for ten to twenty minutes before assembly.
In the following step, do not exceed 52 ft–lb
(70.5 Nm) torque. The motor may be damaged if
this torque is exceeded.
20. Using No. 77H–281 Coupling Nut Wrench, install the
Coupling Nut and tighten it to 50 to 52 ft–lb (68 to
70.5 Nm) torque.
Assembly of the Throttle Lever and Inlet
1. Assemble the Throttle Lever Assembly (17) as
illustrated in Dwg. TPD662.
** Registered trademark of ND Industries.
MAINTENANCE SECTION
2.
3.
4.
5.
6.
Assembly of the Arbor
1.
2.
3.
4.
5.
6.
(Dwg. TPD662)
21
Align the holes in the Throttle Lever Assembly (17)
with the slots in the Throttle Handle. Using a soft
hammer, tap the Throttle Lever Pin (16) through the
Throttle Lever Assembly. File off any sharp edges.
Operate the mechanism to assure operation.
Grasp the flats of the Throttle Handle Assembly (1) in
a vise, air inlet up.
Insert the new Throttle Valve Spring (6), small end
first.
The Inlet Bushing in the next step has an
interference thread. Apply a light film of oil to the
threads before assembly.
Clean the face of the Inlet Bushing (4) and the Inlet
Bushing Screen (5) in a suitable cleaning solution
before assembling into the tool. Insert the parts in the
end of the Throttle Handle. Using a wrench, tighten
the Inlet Bushing (4) to 40 ± 5 ft–lb (54 ± 7 Nm)
torque.
Fill the Oil Chamber with the recommended oil and
install the Oil Chamber Plug (7). Tighten to 4 ft–lb
(5.4 Nm) torque.
For Models 77H120H63, 77H120H63–EU,
77H90H84, 77H90H84–EU, 77H120H84 and
77H120H84–EU, press the Wheel End Bearing (42 or
51) onto the Arbor (35 or 36).
Grasp the Arbor (35 or 36) in a vise, spline end up.
Install the Bearing Lock Washer (41 or 50) and
Bearing Locknut (40 or 49) onto the Arbor. Tighten
the Locknut snugly. Bend the tangs of the Bearing
Lock Washer into the grooves of the Bearing Locknut.
Remove the Arbor from the vise.
Grasp the Arbor Housing (22) in a vise, guard end up.
Install the Dust Seal (36B) on the Arbor Housing.
Lubricate with 3 to 4 cc of Ingersoll–Rand No. 68
Grease and install the Arbor Coupling (34) into the
Arbor Housing (22) and onto the spline of the rotor
shaft. Slide the spline of the Arbor (35 or 36) into the
Arbor Coupling (34).
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