corsair retract issues
#1
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corsair retract issues
hi my corsair has robart retract with airtank and valve but i cant put more then 20psi in it for some reason??
i tried footpump handpump and even my dewalt 120psi compressor i use for light mechanic work still nothing. i use robart airline retainers everywhere and have also brass T fitting everywhere with a cylinder to retract tailwheel. have not maiden the plane yet to this issue.
i tried footpump handpump and even my dewalt 120psi compressor i use for light mechanic work still nothing. i use robart airline retainers everywhere and have also brass T fitting everywhere with a cylinder to retract tailwheel. have not maiden the plane yet to this issue.
#8
I've never made a conscious effort to put the retainers on one way or the other and have never had this problem. My guess is you have a major leak or pinched line leading to the tank.
#10
hi my corsair has robart retract with airtank and valve but i cant put more then 20psi in it for some reason??
i tried footpump handpump and even my dewalt 120psi compressor i use for light mechanic work still nothing. i use robart airline retainers everywhere and have also brass T fitting everywhere with a cylinder to retract tailwheel. have not maiden the plane yet to this issue.
i tried footpump handpump and even my dewalt 120psi compressor i use for light mechanic work still nothing. i use robart airline retainers everywhere and have also brass T fitting everywhere with a cylinder to retract tailwheel. have not maiden the plane yet to this issue.
Drill bit size - .039(# 61) max.
- .036(# 64) min.
P.S. I use retainers (knurled nuts) on all connections and have never experienced any problems with using them.
Roger
Last edited by ForcesR; 04-13-2015 at 01:46 PM. Reason: drill bit size
#11
My Feedback: (16)
More than likely the brass T-fitting connected to the airline that is connected to the airtank is almost completely blocked by flashing left over from the manufacturing process. The T-fitting is acting as a pressure restrictor due to the left over flashing. Take a small drill bit and run it through all three openings of the T-fitting. I have experienced this same issue in the past with the brass T-fittings. I now run a small drill bit through every T-fitting to get rid of any left over flashing before T-fitting installation.
P.S. I use retainers (knurled nuts) on all connections and have never experienced any problems with using them.
Roger
P.S. I use retainers (knurled nuts) on all connections and have never experienced any problems with using them.
Roger
Correct that connection and you will have no problems.....
Larry/Instructor
#12
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More than likely the brass T-fitting connected to the airline that is connected to the airtank is almost completely blocked by flashing left over from the manufacturing process. The T-fitting is acting as a pressure restrictor due to the left over flashing. Take a small drill bit and run it through all three openings of the T-fitting. I have experienced this same issue in the past with the brass T-fittings. I now run a small drill bit through every T-fitting to get rid of any left over flashing before T-fitting installation.
#13
Good to know about he fittings. Have not had the problem yet but now I know to look there when it happens. The free exchange of ideas is always great. Let us know if this fixes it.
#15
My Feedback: (15)
There is another possible problem, when you tighten the pump to the air valve and turn it , at time it will turn in airline inside the plane, if this occurs you will not get air into the tank, same exact process about 20 psi and it seems so difficult to fill .
If this happens you have to disassemble the internal line, unkink the line, retighten and if possible carefully expoxy the internal nut to the frame so it can not turn as you tighten the pump to the valve.
If this happens you have to disassemble the internal line, unkink the line, retighten and if possible carefully expoxy the internal nut to the frame so it can not turn as you tighten the pump to the valve.
#18
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I've never used anything but friction to retain the hose and in 20+ years of using pneumatic retracts it has not been an issue. Just be sure you always keep fresh hose on the nipple. In other words, if you remove the hose for any reason always cut it back to make sure you have fresh, unstretched hose going back on the nipple. It doesn't hurt to change out your air lines every decade or so too!
#20
Make sure that your "tank" is glued in and not twisting when the engine running and vibrating,the tank will tend to twist from vibrations.Use foam spray insulation to lock the tank in place.
Tom
Tom
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so i removed everything and checked everything, nothing. so i finally hooked up the airtank alone to the fill valve and still not filling past 20psi enough for 1 1/2 cycle at the most. my wild guess here is FAULTY AIR TANK so im ordering a bigger one than the one that came with the package vavle and all that hopefully it will work if not electric retracts here i come
#23
so i removed everything and checked everything, nothing. so i finally hooked up the airtank alone to the fill valve and still not filling past 20psi enough for 1 1/2 cycle at the most. my wild guess here is FAULTY AIR TANK so im ordering a bigger one than the one that came with the package vavle and all that hopefully it will work if not electric retracts here i come
Drill bit size - .039(# 61) max.
- .036(# 64) min.
Roger
Last edited by ForcesR; 04-13-2015 at 01:49 PM. Reason: Drill bit size & word addition "partial"