Nova-Tech LMI Roytronic Series A Metering Pump User Manual
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MAINTENANCE
5.7 Stroke Length Setting
The Stroke Adjustment Knob is calibrated for each pump, and does not need to be re-
moved during Liquifram™ replacement or during most other maintenance. If the Stroke
Knob is removed for any reason it becomes necessary to reset the stroke length. Follow
the procedure below to approximate the proper factory setting. If a more accurate setting
is required contact your distributor or manufacturer.
1. Install a new Stroke Shaft. Note that there will be some resistance as the O-ring slides
into the control panel. The Stroke Knob can be used to turn the Stroke Shaft. Continue
to turn the Stroke Shaft until there is no longer any diaphragm movement. It may be
necessary to turn on the pump in order to get the Stroke Knob completely forward;
however, care should be taken to ensure that the Stroke Shaft is contacting the Plunger
before turning on the unit. Otherwise the pump could be damaged.
2. Once the Stroke Shaft is completely forward, you can reset the stroke length. Press in
the Stroke Knob so that the Stroke Knob Pointer indicates 0 (zero).
3. Use a Phillips head screwdriver to install the Stroke Knob Screw.
4. Insert the Stroke Knob Pointer into the Stroke Knob.