Service
12.Slide priming plate (9) (beveled edge up) onto priming rod (8). Screw nut (10) onto priming rod and tighten.
13.Reconnect the pump’s ground wire to a true earth ground.
Check Valve Adjustment
This pump has an adjustable piston ball check.
To change the piston ball travel, loosen the locknut (4). Turn the piston valve housing (14) counterclockwise to increase and clockwise to decrease. Medium viscosity fluids should have a 3/16 in. (5 mm) ball travel.
Decreasing the ball travel minimizes surging at stroke changeover; however, too short of ball travel restricts the flow and slows down the pump.
12 309407