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309407
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.
