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Installation Procedure for Model ADA100 Rotary Hand Pump

Section 6: Pumping Water. Finishing Touches

It will require about three rotations for each foot of water depth to get the water up to the pump head. 100 feet will require about 300 rotations. There is a very small bleeder hole about 3 feet below the pump head, in the top drop pipe. This takes about 15 minutes to drain and protects the pump against freezing. Each time you go out to pump after a period of pump inactivity, it will require about 10 to 12 rotations to get the water back to the pump head. The check valves in the pump cylinder allow a very small amount of leakage over time. Over several days or weeks, you may need to pump a few extra rotations to get the water back to the top.

Adjusting and setting up the pump

In this section we will be making adjustments to the force required to operate the pump, as well as completing the final steps of pump assembly.

It is now time to adjust the force required to operate the pump. The counterbalance has already been configured so that it takes five pounds of force (at a maximum) to raise the weight to its elevated position. We will use this fact to help us position the track roller bearing in the correct hole of the pin arm. Begin cranking the pump. After ten to twenty revolutions, water should begin pouring from the spout. The 180 degrees corresponding to the upstroke of the piston should feel as “hard” to crank as the 180 degrees corresponding to the elevation of the counter weight.

  • If the 180 degrees of the upstroke of the piston is more difficult – the track roller bearing needs to be moved closer to the shaft
  • If the 180 degrees of counterbalance elevation is more difficult – the track roller needs to be moved further from the shaft
  • If the full revolution feels consistent – the roller bearing is positioned correctly

With the correct roller bearing position determined, tighten roller bearing using Allen wrench.

Be sure that the roller bearing is fastened securely.

next page: ADA100 full parts list





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1140 Amarillo Drive, Gardnerville, Nevada 89460-7504