The hand knob linkage employs a slip type coupling which can be reassembled in either
of two rotational orientations 180 apart from one another: therefore, the original
orientation must be retained for reassembly so that pump calibration is retained.
Use the following procedure to remove the cover assembly:
1. Adjust the stroke length until the dial indicator is set at the zero stroke setting. Adjustment is
easier with the drive motor running. Allow the locking mechanism to engage to the nearest
détente.
2. Disconnect the power source to the drive motor.
3. Remove the cover screws.
4. Using care not to rotate the adjustment shaft, remove the cover vertically from the eccentric
box.
Use the following procedure to reinstall the cover assembly:
1. Rotate the stroke cam screw clockwise until the slider cam is in a full upward position.
2. Verify that the cover dial indicates the zero stroke setting.
3. Using care not to disturb the adjustment shaft, install the cover assembly, engaging the
drive coupling.
4. Replace the cover bolts, and tighten to 20-24 In-lb (225 – 270 N-cm)..
5. Press the adjustment knob down and rotate it clockwise until it stops. Adjustment is easier
with the drive motor running.
6. Verify that the cover dial indicates the zero stroke setting as before; if so, reinstallation is
complete and if not, refer to step (7) below for realignment.
7. Loosen the screw in the center of the dial cover.
8. Adjust the dial cover to align the pointer with the “zero” mark.
9. Retighten the screw in the center of the dial cover.
8. PUMP MOTOR
8.1 REMOVAL & REINSTALLATION
Use the following procedure to remove and reinstall the pump motor:
1. Disconnect the power source to the drive motor.
2. Disconnect the motor wiring from the motor.
3. Remove the four bolts retaining the motor to the motor adaptor and remove the motor.
The coupling is an interlocking jaw design and uses an elastomer spider between the two
coupling halves. One half of the coupling remains on the worm shaft and the other coupling
half on the motor shaft (refer to Figure 6 and Figure 11).
4. Loosen the setscrew that retains the coupling half to the motor shaft and remove the
coupling half, taking care to not lose the shaft key.
5. Install the coupling half on the shaft of the replacement motor, ensuring that the shaft key is
in place.
6. Align the end of the shaft flush with the inner surface of the coupling and tighten the
setscrew.
7. Reinstall the motor by reversing steps (3) through (1) above.
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