Lift cylinder and piston

LisaK

Member
Few weeks ago we pulled the cover and honed the cylinder and planned on putting the new piston in....my husband had trouble getting the piston in and tapped it in with a hammer.....its now stuck flush with the cylinder opening...compressed air wont push it back out either. The old one came out no problem so whats the deal are the newer pistons bigger? Id prefer to get the new piston back out somehow rather than throw the whole thing. I believe he was going to tack weld a piece of metal on te end of it maybe the piston I don"t know I didn"t ask and try pump it full of grease to try push it out. any simpler solution?
 
Take some ATF and with it pointing up so it will drain down into the cylinder let it sit so the o-ring is you used the new improved NAA piston can get lubed up well. Than after sitting say over night pour some ATF into the cylinder and try the air again. Point it so if it fly's out it does not hurt some one or something
 
Also once you get it back out take the o-ring and back up washer off and see if the piston will slide inside the cylinder and go in and out easily. It should pretty much drop right in and be able to be dumped right back out. Also when put in was it prelubed or put in dry
 
He did lube it before trying to put it in. I know he put the neoprene back up washer on instead of the leather one that came with it.
 
Which side did he put the o-ring and back up washer?? Should be o-ring in to the cylinder first then back up washer and if back wards might be where the problem is
 
If he did the back up washer going in first it may have rode up on the o-ring and that is why it is now stuck. As for using air to push it out how much pressure is he using and is he sealing the tip of the air nozzle so it gets most of the pressure?? Also remind him to point the piston/cylinder in a safe direction. Sure would hate to here he had a hole the side of the piston in his gut
 
On all the ones I have rebuilt and put in the new improved NAA piston and o-ring and back up washer it was an easy push it in by hand
 
I think we've got 2 60 or 80 gallon tanks plummed together im not sure what the output psi is. Well I told him to try the atf. I believe most of the air pressure is going into the cylinder. worked pretty well to get the old one out. Ya they really fly out of there quick If your not careful!!
 
When I do one I try to have it set up so the piston will fly into a pile of rags that are in a bucket laid on its side
 
"Ya they really fly out of there quick If your not careful!!"

That is an UNDERSTATEMENT. Stuff like that has enough force to KILL.

Pumping oil into it with a hand pump would be a LOT safer than compressed air.

Case in point... quite a few years ago we had a trencher with a 12HP Briggs in the shop.

Took the head off and it had a broken rod, with the piston way down in the bore.

I got the BRILLIANT idea to blow compressed air into the crankcase through the breather.

It built up pressure for a few, then, suddenly the piston popped out... straight upwards, past the noses of myself and a helper, hit the foil-faced insulation about 18 feet overhead, and tore a hole in it.

Then, fell down, again right between us, and slammed down on the flywheel shrouding just a few inches from where it took off!

CRAP!

We were darned lucky one of use didn"t get in the face on the way up, or on the head on the way down!

Since then, I don"t use compressed air for such things!
 
you can tap the hole that feeds oil to the cyl for a big grease fitting. then fill the cyl with gear oil thru the hole. put grease fitting in.. then pump some grease to it. pretty much has to come out.. that or pop the 4psi hose the grease gun has ( usually ).

post back.

ps. closed end of piston goes into bore. oring first.. backup washer on the back side. oil presses the oring into the backup washer and that into the ring land wall. BU washer protects oring from cutting

cup end of piston faces out for dogbone to ride in
 
Just knock it on into the cylinder. I guarentee it will move with the pump pressure and probably work just fine.

Be very careful using air to push the piston out. If it is not sitting on the oepn end of the cylinder against some rags etc it can come out like a cannon ball and do as much damage.

Zane
 
That's how he has it stuck in there. I'll post back when we get back out to it. Ice fishing on the agenda this weekend.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top