Anyone know what could cause this? Its a CAT Pump with a Superior box. When you switch to wash the pressure line pulses. The pressure isn’t near what it should be too. We have replaced the unloader, and cleaned the tank filters. It builds pressure to 1K then when trigger is it it drips to 500 psi. I attached some videos. Anything helps pretty new at this!
Car Wash Forum
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Pulsating Pressure Hose
- Thread starter Chewy3925
- Start date
cantbreak80
Maybe I need new clubs
#1 Remove and inspect valves...broken valve o-rings and backup rings or something stuck inside the valve will cause pulsation
#2 Check soap and wax supply lines...leaking fittings or hoses will allow air into the pump
If neither completely solves the problem...new seal kit.
If the pump is as old as the pump stand...look closely inside the valve ports and seal ports for erosion. Eroded ports require special machine work that no seal will resolve. Alternatively, a new pump head is in order.
#2 Check soap and wax supply lines...leaking fittings or hoses will allow air into the pump
If neither completely solves the problem...new seal kit.
If the pump is as old as the pump stand...look closely inside the valve ports and seal ports for erosion. Eroded ports require special machine work that no seal will resolve. Alternatively, a new pump head is in order.
