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QD8 Quik-Drive Tap-Changer Motor Replacement Kit 57A63675100A
INSTALLATION INSTRUCTIONS
MN225038EN
June 2016
Reassembly and installation procedure
9. The new motor kit has a 12-tooth sprocket (black)
for the phenolic QD8 tap-changer and an 11-tooth
sprocket (silver) for the polymer QD8 tap-changer. The
motor shaft has two snap ring grooves and a Woodruff
keyway. Install a snap ring with a snap ring pliers
into the inner snap ring groove behind the Woodruff
keyway. Using a pliers, squeeze the Woodruff key into
the keyway with the Woodruff key tilted slightly down
towards the end of the motor shaft. Refer to Figure 9.
Woodruff Key
Snap Ring
Snap Ring Groove
Figure 9. Woodruff key placement
10. Align the sprocket keyway with the Woodruff key on
the motor shaft. Slide the sprocket onto the motor shaft
with the sprocket hub end towards the motor. Install
the second snap ring into the outer snap ring groove
using a snap ring pliers. Refer to Figure 10.
Sprocket Hub
Outer
Snap Ring
Figure 10. Placement of the sprocket
11. Use a 1/4" socket on a ratchet attach the motor
mounting plate to the new motor using the new
motor mounting plate screws provided in the motor
replacement kit. Do not fully tighten. Make sure the
motor wires are extending out of the top right of the
motor when looking at the motor from the sprocket
end. Refer to Figure 11. Using a torque wrench, tighten
the motor plate mounting screws to 18–20 in-lbs
(2.0–2.2 Nm).
Motor Mounting
Plate Screw
Motor Wires
Sprocket End of
the Motor
Figure 11. Motor mounting plate
