Install the clamp nut (Fig. 2.7, Item 2) and
torque the screw in the side of the clamp
nut to 70 in-lb.
NOTE
Tightening the screw in the clamp nut will
increase the turning torque on the pinion.
Always measure the turning torque with the
clamp nut installed and the locking screw on
the side tightened.
e.
Measure the turning torque on the pinion
using the 1/4” drive pinion wrench (P/N
9660154-00) and a torque wrench. The
turning torque should be 13-17 in.-lbs. If the
turning torque is greater, loosen the clamp nut
and make slight adjustments with a hand
press on the pinion. If the turning torque is
less, slight adjustment can be made by
tightening the clamp nut, or remove the clamp
nut and make slight adjustment with a hand
press on the spacer.
2.
Apply anti-seize compound to the motor shaft
spline. Attach the endbell to the motor. If
shim stock was removed during during
disassembly, replace it only if using the same
motor.
3.
Install a new O-ring (Fig 2.6, Item 12) on the
motor pilot flange.
Gear Housing to Motor Assembly
NOTE
Before assembling the gear housing to the
motor, you must first determine whether you
are to build a left or a right drive unit. As an
assembler holds a drive unit with the brake
end of the motor up and the terminal lugs
pointing forward, a right drive unit would be
assembled with the gearbox pointing to the
right; a left drive unit would be assembled
with the gearbox pointing to the left (see Fig.
2.8).
1.
Determine the thickness of the 4-hole shim
package required between the motor endbell
and gear housing. The thickness of the shim
package is determined by one of the
following formulas:
Use Procedure 1 when you have both the
number on the end of the pinion, and the
number on the gearbox housing.
A + B - C = Shim package
Refer to Fig. 2.9 Procedure 1
Use Procedure 2 when the number on the
end of the pinion is illegible or there is no
number.
D + 2.061 - C = Shim Package
Refer to Fig. 2.9 Procedure 2
A
is the distance from the back surface of the
pinion gear to the mounting face of the motor
Measure using the Pinion Height Dial Indicator
(P/N 9650004) zeroed at 1.000”. To get the
correct distance, measure to the top of the
bearing , not to the endbell casting surface.
The number should be around 1.40”
B
is the distance from the back face of the
pinion gear to the theoretical center of the
matching ring gear. This number is etched on
the end of the pinion gear.
If this number is
not legible or there is no number, use
Procedure 2.
C
is the distance from the center of the
gearbox housing to the mounting face of the
motor mounting face. This number is
stamped on the back of the gear housing
casting. The stamped number may or may
not begin with a four. If the number reads
4.611, for example, record this number as
Distance
C
. If the number reads only .611, for
example, assume a four at the beginning.
Distance
C
would therefore be 4.611.
D
is the distance from the end of the pinion to
the mounting face of the motor. If the number
on the end of the pinion is not legible, then
measure D using the Pinion Height Dial
Indicator zeroed at 2.500” . The number
should be around 2.57”
E
lectric
C
ounterbalance
H
igh
O
utput
Drive
12/20/99
2.8
Figure 2.8 - Drive unit orientation
.
RIGHT
LEFT
