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V66 blew top cap twice. Cause?

Discussion in 'Meyer / Diamond Products Discussion' started by snowdays, Feb 16, 2014.

  1. snowdays

    snowdays Senior Member
    from Ohio
    Messages: 119

    A friend has a V66 V blade pump. Twice in the last 3 months, the top cap blew apart. It happens when the driver is at the end of a push. The blade comes up in the snow pile and he hits the up button. Essentially, the pump is free lifting. Should the pressure in the pump be checked? Any thoughts or ideas appreciated.
  2. JeepCoMJ

    JeepCoMJ Senior Member
    Messages: 284

    Pressure could be too high, but more likely than not, the stacking stops are not stoping the blade from coming up and contacting the lift arm. Check to be sure that the blade is hitting the stacking stops when the ram is all the way up. If not, adjust the chain. If it can't float all the way down once chain is adjusted, you need to add material to the stacking stops to keep from repeating the issue.

    Bottom line, even if the pump is adjusted too high, you shouldn't experience this issue If the stacking stops are correct. It takes 3,000psi to blow the top cap. A v66 should see 2500psi max with the small cylinder, though I believe they all had the large cylinder diameter, so it would be 2000 psi...neither of which is enough to blow the cap.

    Have you guys been playing with the pressure relief valve?