yeahbaby

My Feedback: (21)

Hey fellas I've tried the bvm o-ring lube but to no avail. The offending cylinder is on my yellow a/c F18 retract that I have zero confidence in getting a replaced.

Any suggestions and possible fixes? It Appears to be leaking around the drive shaft as it exits the cylinder. I've sent a message to down and locked as to possible conversion and currently waiting on response.

thanks

gunradd

My Feedback: (9)

Can you pull the cylinder out and remove the top and get a new O-ring? I know some planes you cant get the cyclinders apart but others you can unscrew the cap and replace the O-rings.

Harbor freight has a kit with a crap load of Orings and might have your size.

yeahbaby

My Feedback: (21)

Ahh yes I'm going to pull it apart today and try that also.

rhklenke

My Feedback: (24)

Yeah, as Chris said, if its the shaft O-ring, the only option is to disassemble the cylinder, remove the shaft, and replace the o-ring itself. On most cylinders, if you can get it apart and get the shaft out, you can replace the o-ring.

If its the piston o-ring, then Maj. Woody's technique of taking off the o-ring, wrapping some teflon tape around the piston grove, and replacing the o-ring with BVM lube on it, works great.

Bob

yeahbaby

My Feedback: (21)

Well after removing affected cylinder and placing in bowl of water it was apparent the nipple was the offending item. Unfortunately when removing the air line it became even more obvious what the problem was as the nipple broke off completely. So I guess I can try a Robart cylinder of similar dimensions and stroke. Still waiting on return call / email from down and locked. If anyone knows those guys tell em I could use their help.

arizcowboy

My Feedback: (14)

Sent you a PM

grbaker

My Feedback: (29)

You might be able to drill out and install another nipple.

yeahbaby

My Feedback: (21)

Great idea fellas. I have no idea if it's a press fit or Threaded but I like the idea. Where can I get a replacement nipple? Robart?

Harley Condra

My Feedback: (4)

Here ya go, Buck.
http://www.clippard.com/products/fitting-barb-mini
Use the 3-56 fitting with a 1/16 barb. Just get a # 46 drill bit, and a 3-56 tap.
Use some good tap lube when tapping, and work carefully. Seal it with some blue Locktite........

Vincent

My Feedback: (61)

Hey Buck...just steal a fitting off one in your junk box, anything will work even a fitting off of an old retract valve etc.. You can hysol or jb weld it on or thread which ever way works.
Vin...

SECRET AGENT

My Feedback: (18)

Hey Buck, I'm in Vegas at the moment, you wouldn't believe how many nipples are over here, I might grab you one tonight, HA!

yeahbaby

My Feedback: (21)

Thanks again fellas!! Bros helping bros or grabbing hoes life is good. Hadn't even considered old retract valve nipples.

gunradd

My Feedback: (9)

I have used old ones many times also. You can use a small bead of hysol when installing it.

Randy M.

My Feedback: (38)

Can use a vent fitting on an old glow engine muffler if times get tough

yeahbaby

My Feedback: (21)

All great ideas, will giver a go

blackcat

i replaced the entire cylinder, also on a yellow f18, (noseleg) with I think a robart 5/8? x 2 inch. had to make a small extentsion on the side frames, and the piston movement was way too long, but that doesn't matter, it just goes to the distance it needs to. has worked for 4 years and 200 flights, cost about $30

MaJ. Woody

My Feedback: (28)

Too funny.

MaJ. Woody

My Feedback: (28)

ANow that's some funny $h1t!

yeahbaby

My Feedback: (21)

Fantastic was thinking that cylinder would work will acquire one as spare