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8.11 Oil Seal
The PulsaPro pumps utilize an oil seal on the worm shaft (input shaft) like the Pulsa product line.
This seal is serviceable, but only necessary to replace if there is an oil leak.
Replacing the Oil Seal
o
Power has been disconnected from the source; safety procedures are followed.
o
Remove the four fasteners securing the motor to the motor adaptor and remove motor.
o
Rotate the coupling on the worm shaft until you see the set screw through the slots on the
adaptor.
o
Remove the four hex head cap screws securing the motor adaptor to the gearbox.
o
With the motor adaptor removed, you have visibility of the tension nut and the oil seal,
using a marker or equivalent put a mark on both tension nut and gearbox (Figure 45). This
will provide a reference when reassembly is performed, ensuring that the nut is properly
aligned.
o
Remove the oil seal
o
Place electrical tape or equivalent over the end of the worm shaft prior to installing new oil
seal to prevent damage.
o
Use Loctite # 534 around the outer surface of the oil seal.
o
Press the oil seal onto the worm shaft and slide in place.
o
Gently tap the oil seal flush into the tension nut.
Figure 50
Figure 51
Figure 52
8.12
Pump Motor Removal & Reinstallation
o
Disconnect the power source to the drive motor.
o
Disconnect the motor wiring from the motor.
o
Remove the four bolts retaining the motor to the motor adaptor and remove the motor.
o
The coupling is an interlocking jaw design and uses an elastomer spider between two
coupling halves. One half of the coupling remains on the worm shaft and the other on
the motor shaft.
o
Loosen the setscrew that retains the coupling half of the replacement motor, ensuring
that the shaft key is in place.
o
Align the end of the shaft flush with the inner surface of the coupling and tighten the
setscrew.
o
Reinstall the motor by reversing the steps.
