Eaton QD5 Manual page 46

10. The new motor kit (Part # 57A636751A100A) has a 12
tooth sprocket for the QD8 tap-changer and an 11 tooth
sprocket for the QD5 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, put
the woodruff key into the keyway with the woodruff key
tilted down towards the end of the motor shaft. Refer
to Figure 114.
Snap Ring
Figure 114. Woodruff key placement.
11. 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 115.
Figure 115. Placement of the sprocket.
42 QD5 QUIK-DRIVE TAP-CHANGER INSTALLATION AND MAINTENANCE INSTRUCTIONS MN225012EN March 2016
Woodruff Key
Snap Ring Groove
Sprocket
Hub
Outer
Snap Ring
12. Use a 1/4" socket on a ratchet to 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 116. Using a torque wrench, now
tighten the motor plate mounting screws to 18–20
lb-ins (2.0–2.2 Nm).
Sprocket End of
the Motor
Motor Mounting
Plate Screw
Figure 116. Motor mounting plate.
13. Place the motor into the motor relief area of the
molded back panel. Put the chain on the motor sprocket
engaging the sprocket teeth. Make sure the chain is fully
engaged around the bottom of the drive sprocket gear. If
there are any loose links around the bottom of the gear,
the motor will not fit properly. Refer to Figure 117 .
N otee: If you have the motor pivot stud design as shown in
Figure 113, follow Step 13. If you have the motor pivot
bolt design as shown in Figure 114, follow Step 14.
Molded Back
Panel Motor
Relief Area
Figure 117. Locating motor.
Motor Wires
Motor Chain
Adjustment
Bracket