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Technical Center
"FX-1000p Peristaltic Pump Motor Replacement"
Foxcroft Equipment and Service Co., Inc.
2101 Creek Road
Glen Moore, PA 19343 USA
610-942-2888
FAX 610-942-2769
email sales@foxcroft.com
| Technical Center | ||
| FX-1000p Chlorine Analyzer | ||
| Troubleshooting | ||
| Preventive Maintenance | ||
| Cleaning Electrode | ||
| Peristaltic Pump Replacement | ||
| Mixer Gap Adjustment | ||
| PM Kit Installation | ||
| FX-1000p-B Bufferless | ||
Peristaltic Pump Motor Replacement
The pump motor is linked internally to the peristaltic pump via a brass coupling with a slot in the end. The slot matches up with a drive pin that runs perpendicularly through the pump shaft. The brass coupling is machined such that connection between the pump and the motor will not cause binding that could prematurely wear the motor gearbox. If the brass coupling is mounted on the shaft too close to the motor gearbox, it could bind on the back of the pump head, or the drive pin could bind on the bottom of the brass coupling end slot.
The pump motor is now only available with the brass coupling pre-installed (except drop-shipped motors), as an assembly, to ensure the clearances necessary to avoid motor and pump binding. Should the coupling ever be removed from the motor, it should be reinstalled with exactly a 1/16" gap between the motor gear box bearing and the back of the brass coupling. The brass coupling should also be oriented so that the set-screw will be tightened against the center of the flat spot on the motor shaft
1. Turn off the AC power to the FX-1000p.
2. Remove the inner cover plate to access the motor and pc boards.
3. Disconnect the motor wiring at the lower power supply board (TB-1B). Note the wiring color and placement in the terminal strip.
4. Remove the two extended brass nuts that hold the motor to the nylon mounting block.
5. Remove the old motor and brass coupling assembly.
6. New motor installation is the reverse of motor removal.
7. After the new motor is installed, and before applying AC power to the FX-1000p, remove the tubing from the pump head. The axis of the pump shaft should not feel like it is binding or stiff. If it does, the motor may wear out prematurely.
8. If the pump head rotational "free-play" is good, reinstall the tubing, and place the analyzer back into operation.
The pump head should rotate smoothly and continuously at 4 revolutions per minute. If it does not, or the motor sounds like it is "skipping", or the pump head is stopped easily with finger pressure, the motor is binding and may wear out prematurely.