303mooney Posted January 6 Report Posted January 6 Hi, does anyone happen to know the size of these two fittings? I'd like to pick up some block off plugs while the pump is out. Ive attached the two areas below
MB65E Posted January 7 Report Posted January 7 1/8th pipe thread I believe into the pump The -4 or -6 AN plugs for the lines. I just did an AN cross reference for the pump orings to rebuild it. Only ones that were tough were the two inner seal with the AN6227-8’s. -Matt 1
M20F Posted January 7 Report Posted January 7 Note the springs H-1516 and H-1516-1. One is strong and one is weak, don’t recall which is which. Needless to say if you reverse them things don’t work. 1
Gee Bee Aeroproducts Posted January 7 Report Posted January 7 Use Teflon hose with chafe , 30% smaller o.d. Use Alloy adapters with Teflon hose assys as the fittings on the Teflon are stainless steel We also have fittings with lock wire holes per the PT6 spec . GB
303mooney Posted January 7 Author Report Posted January 7 1 hour ago, Gee Bee Aeroproducts said: Use Teflon hose with chafe , 30% smaller o.d. Use Alloy adapters with Teflon hose assys as the fittings on the Teflon are stainless steel We also have fittings with lock wire holes per the PT6 spec . GB Those are some nice hoses. Thank you for the advice.
AIREMATT Posted January 11 Report Posted January 11 On 1/7/2026 at 6:17 AM, M20F said: Note the springs H-1516 and H-1516-1. One is strong and one is weak, don’t recall which is which. Needless to say if you reverse them things don’t work. Any idea what happens if you do reverse them? What are the indications? Thanks!
N201MKTurbo Posted January 11 Report Posted January 11 5 minutes ago, AIREMATT said: Any idea what happens if you do reverse them? What are the indications? Thanks! If you put the strong spring in the inlet valve, there won’t be enough atmospheric pressure to unseat the ball. You will just cavitate the pump and the handle will spring back when you pull it out. 1
Recommended Posts