-40%
Vedeneyev M14-P PRV PISTON LARGE, Yak 52, Yak 18-T FREE SHIPPING in US
Vedeneyev M14-P PRV PISTON LARGE, Yak 52, Yak 18-T FREE SHIPPING in US
Vedeneyev M14-P PRV PISTON LARGE, Yak 52, Yak 18-T FREE SHIPPING in US

Vedeneyev M14-P PRV PISTON LARGE, Yak 52, Yak 18-T FREE SHIPPING in US

$ 35.3

Availability: 72 in stock
  • Warranty: No Warranty
  • Non-Domestic Product: No
  • Modified Item: No
  • Custom Bundle: No
  • Country/Region of Manufacture: United States
  • Compatible Make: Yakovlev
  • Brand: Yakovlev
  • Manufacturer Part Number: TYC0204
  • Condition: New

    Description

    FREE SHIPPING IN CONTINENTAL US
    All two seat Yaks ( 52/54) plus the Yak 18-T use this large piston in the Pressure Relief Valve.
    ( Yak 50, Yak 55 and Yak 52TW use the SMALLER diameter PRV Piston that does not have a saddle )
    The hex nut on the PRV (Yak 52 shown) - controls the pneumatic system pressure by adjusting a compression spring. That force is on this Piston 24/7 so eventually the rubber slug in the face will take a set  -  at which time it may not seal as well as a new one.
    A great place to start if your air pressure gauge is dropping overnight.
    To replace it, * carefully depressurize the system, * remove the hex nut ( making a note of how many turns were required ) * lift out the spring, * swap the piston with your new one  * re-install the spring and wind on the same number of turns on the hex * THEN LEAVE IT ALONE for a couple of hours. Let the spring pressure pre-seat the rubber seal BEFORE YOU TURN ON  system air.
    Doing this will prolong Piston seal life.