View Full Version : Tango 45-10 stuck pinion
Funflyer
05-09-2008, 11:16 AM
This heli I bought has a 16 tooth pinion already installed on the Tango motor. I took out the set screw to make sure it had loctite, and the guy used plenty...maybe even poured it in the hole. :arggg: I can't even get the pinion off the shaft.
Are the pinions a press fit? I don't have a gear puller and I don't want to damage the bearings in the motor. I guess I can leave it for now and hope it is what I want... But what is the best way to get the pinion off. I tried a little heat but I don't want to burn the lubrication out of the bearings and I don't want to damage the pinned helical gear. So far it isn't budging. :mad:
Hi FF,
I'd use a hemostat under the pinion as a heat sink, and then heat up the pinion with a soldering gun. I think the loctite is only good for about 300 F. Once you hit that temp, you should be able to pull it off.
Good luck!:YeaBaby:
LJS
BruceW
05-09-2008, 11:43 AM
You need a pinion puller. They are cheap and most hobby shops have them.
Flybar-less
05-09-2008, 12:36 PM
If you heat the pinion, you should replace it with a new one. Unless it is one of the laser welded ones, rather than the adhesive joined pinions.
Funflyer
05-09-2008, 01:05 PM
I'll just get a pinion puller. I did heat the pinion, but only to about 200 F. It wasn't enough to budge the loctite so I'm guessing my pinned pinion is fine.
ShuNut
05-09-2008, 06:27 PM
...............Unless it is one of the laser welded ones, rather than the adhesive joined pinions.
Laser welded ? is this how Mikado are doing them now ? good news if so.:thumbup:
Funflyer
05-31-2008, 08:29 AM
HOLY LOCTITE Batman!
I got my pinion puller yesterday and last night went to work on the stuck pinion. First I had to surgically modify the puller to fit the Mikado pinion. I then spent 2 VERY frustrating hours trying like crazy to get that dang pinion off the shaft. At the end of the night I had moved the pinion about 5 mm, not even half way, and completely destroyed the pinion puller. I stripped the threads out of the puller and broke off part of the supporting end. :DOHI even used my soldering iron to heat the pinion (less than 200F) about a dozen times!
Well today I drove more than an hour each way to get another puller and after modifying that one to fit the pinion I FINALLY got the thing off with the first heated attempt...:woot
It is AMAZING how strong a thin coating of loctite can be when it's sandwiched between the shaft and pinion. The previous owner put WAAAAAAY too much loctite, he had to have poured it in the hole. :bomb: Moral of the story is that it only takes a tiny amount of loctite to do the job and using more than that will cause unnecessary headaches.
helicraze
06-01-2008, 04:00 AM
Sometimes less is more
Wbird
06-02-2008, 11:15 PM
Some people opt ot use locktite poured in like that instead of grinding a flat spot on the shaft. I prefer the flat myself.
Funflyer
06-03-2008, 10:30 AM
Some people opt ot use locktite poured in like that instead of grinding a flat spot on the shaft. I prefer the flat myself.
My problem was this guy did both! Flat spot filled with loctite...:badair: