What kind of liner? We have soaked liners that are stuck in casings in soapy water with great success.... takes a day or two, but it generally works -- IF the liner is not phenolic, which doesn't absorb water.

I've also re-inserted a forward closure and used a bigger hammer :-O Not much else you can do!

J

John,

Yes its phenolic--several hours of soak did little to the motor but discolored the bathtub. It wasn't soapy, tho. And my first proper caveman instinct was pull the o-rings off the forward closure, and beat that sucker out. All I got for my efforts was a slightly sprained shoulder. Now the issue came up recentlyon TPHRA and such things as hydraulic presses have been used with success--one resourceful guy managed to lower his jacked up SUV on the liner with success.

But being a pyro kind of guy with a background in biology, 2 other approaches have occured to me. One is heat as in self cleaning oven--but this dinky oven I have now wouldn't accomodate a decent sized turkey, much less a 6000N case. The other is chemical attack--phenolic is what paper impregnated with epoxy which is susceptiple to acetone and other solvents, so thinking acetone bath. Or enzymes,... something. If it gets down to it I'll just torch the bitch and hope it doesn't deform the case.
John S

First off what Grease was used in the assembly and how much grease did you use. Im a bit of a heavier user of a Good 550 degree capable grease but makes for an easy clean up.

Actually here is somehting that has worked for me in the same situation.

Normally in a case like this a good penatrant oil like wd40 or PB Blaster or equvilent is what I would recomend. Soaking the liner all the way through and it will help loosen the garbage as well as make the liner slick on it outer surface. If you do this I recomend NOT to use heat. be sure to use LOTS of the penitrant oil. WD 40 was what I used and it ended up working great it also has a bit of capabliilties to dissolve carbon and help clean the crud off.

Also Leave the Orings on the forward bulkhead closure as it keeps em strait and doesnt marr up the inside of the casing. Then using a large dowel/Broom handle and push the liner out using the foreward cloure while pushing upon it towards the nozzle end. I recomend to stand the dowel upright and slide the motor case over the top of it and pull down ward as you can have more then one person pull or hand body weight off of it.

Con,

Grease? The red stuff James R uses--think its a synthetic automobile product--and not enuf apparently--and I have been curious about this being something of a newbie--I see guys slather entire lining with grease, but all the instructions I ever see call for small amounts to both ends. So I follow the instructions and now am stuck.
John S

PS: I don't know that the o-rings matter in this case--it isn't budging so not marring the inside--my guess is that if I flipped it and pulled, I'd also get nowhere--in these cases it seems abrubt impacts often get some headway where steady forces don't--then again I'm a bit of a weakling 😳 I think I might try the wd40--happened that i picked up a couple cans recently on sale.

As far as grease I use the Lucas products grease good to 550+ drop point. Just got james some. Others will work as long as the drop point is high enough. And yes I recomend using a bit more then what they recomend. Makes clean up alot easier.

The orings on the closure keep the closure going strait and they ride on the inside case surface. Running the closure metal on metal is not good. It can gouge mar and scratch the inside of the case creating selaing problems later.

I recomend the flip/and pull methoud after you soak in wd 40 for a good period of time and be sure to use plenty of it on it. it must saturate the liner and soak to the case surface. Then you can pull or use just the weigh of ones body also you can do some sudden impacts even in this position if needed.

But that has worked for me for a long time.

Con,

Thanks for the help, I'm definitely changing to the slather it with lots of lube camp for future flights--I have some high temp grease I bought from either forefox or aeroconn which I'll start using as I'm out of the red stuff anyway. I hear you about the o-ring, but even greased like a pig, the closure runs tight, and last thing I wanted was more resistance even if I got a little more area in the process. I'm gonna do a good soak in wd40 tomorrow, its a nice Gold aannodized case--something of a rarity these days, and the machining puts the Loki's and Purple woody's to shame.
Cheers,
John

Just read this and thought of an idea that might work to get the liner started to budge for the next time around. Take the forward closure (I'm assuming that it is tapped) and flip it around with the o-ring on. Next take a piece of all thread longer than the casing and screw into running the allthread through the case. Next drill a hole in a 2x4 to fit the all thread. Slide the 2x4 over the all thread and against the case. You can now put a washer on the allthread and a nut and tighten it. It should pull on the forward closure and get it to move a little - then you can lubricate and continue until the liner hits the 2x4. Hopefully at that point it can be pushed out.

Edward

Ed,

for the mechanically challenged like myself--let me dbl check what you have in mind. The forward closure with O-ring seats against the stuck liner facing backwards rfrom its normal orientation so that a length of all-thread runs the length of the casing and sticks out the opposite end. Slipped over this is a piece of 2-4. Over this washers and a big nut, and the longest wrench i can find, just tighten down on the SOB and pull the liner out. Hey its worth a try. My guess is that it will just cut a hole in the 2 x 4. Its that stubborn, but worth a shot.
John S

first of all have you got the nozzle out? if not use a broom handle to push from the inside to get it out but be sure someone has a hand on it when it brakes loose. you do not want to rune the all thread through the nozzle. at 50 buck I would do everything I can to keep from damaging it. I do not like beating on closures and fro several reasons. you need to get it to start moving and some times if you go the other way things brake loose. the longer they stay together the harder it is going to get. let me know if I can help, I do not want to get back a bent or damaged case.

James,
The nozzle is out, that was easy. Its the liner. I've got a couple days off and with the impending snow dump, likely nowhere to go. So I'll give Ed's idea a try and see what happens.
JS