Water Pump Question

Old-Biscuit wrote:
1) Allen wrench is a 5/64
2) Pump has a Pressure switch that controls when pump shuts off (55#)
3) Pump has a 'Bypass' Spring Loaded Diaphragm that begins Opening at 30# and is FULLY open at 65# (should not reach full open position)
4) Pressure Switch and Bypass Valve have their OWN adjustments
5) Clockwise adjustments raise Pressure Switch shut off set point (counter clockwise lowers)
6) Clockwise adjustments raise Bypass Diaphragm pressure point to begin opening/and pressure when it is fully open (Counter clockwise lowers opening & fully open pressure points)
7) If the switch or by-pass are adjusted too much, the by-pass and switch shut-off can overlap and THE PUMP WILL NOT SHUT OFF.

With a Faucet WIDE Open the pump SHOULD run continuously (counter clockwise adjustment on pressure switch screw until pump runs smoothly)
Then close faucet down to half flow.....turn pressure switch adjustment counter clockwise 1/4 turn (out)
Then turn bypass valve adjustment screw counterclockwise (out)until pump runs smooth
Close faucet down to a trickle ----enough to rinse off a plate
Then turn bypass screw counter clockwise (out) 1/4 turn

Pump should run smooth full open faucet and with a slightly more then a trickle flow.
If pump doesn't shut down when faucet closed...turn bypass adjustment screw clockwise (in) until pump stops (small increments)

Shurflo states that unless you have specific tools(Gauges) you not supposed to adjust or attempt to adjust the Bypass screw. I know of NO RV Tech that would have such gauges and even if they did, WHY spend the time adjusting and connecting? Cheaper to just replace the Pump rather than spend the labor attempting to try to adjust. Even under warranty, NO OEM will pay for attempting to adjust, They just have us replace it. Doug