Sector shaft roller removal?

John Mc

John Mc

Senior Member
Guys, I was able to get the worm gear off my steering shaft by cutting through it per advice I received here on in the "Barn". Now the sector shaft is the problem. I don't see how I can get a cutting wheel in there, any ideas?
Also, someone wrote that the best way to get the new worm gear on the shaft is to boil it in oil. Wouldn't boiling water work just as well? Seems like it would be safer and much less of a mess.
Thanks in advance.
 
No, use the oil, not sure why, but when I was at PWAircraft and we were assembling the brgs into the engines we always heated in oil. Believe me if water would have worked they would have written that into the assembly procedures.
Paul in CT
 
you can also use a hot plate to warm the gear, we used a bearing hotplate in the paper mill to install bearings, it is a coned shaped hot plate. we also used hot oil to heat the larger couplings/bearings-I will not tell you how the old master mechanic used to tell if it was hot enough-ugh still makes me shudder!!! You really do not have to boil it, just heat until it starts to smoke a little
 
Water boils at 212 degrees F and 100 degrees C, no matter how high you turn up the heat, the water will be at 212 and the hotter water vaporizes. Oils boil at higher temps, but it depends on what kind of oil, but it can get into 500F range.

My guess is that 212 isn't a high enough temperature to get you the expansion you need.
 
John Mc said:
Guys, I was able to get the worm gear off my steering shaft by cutting through it per advice I received here on in the "Barn". Now the sector shaft is the problem. I don't see how I can get a cutting wheel in there, any ideas?
Also, someone wrote that the best way to get the new worm gear on the shaft is to boil it in oil. Wouldn't boiling water work just as well? Seems like it would be safer and much less of a mess.
Thanks in advance.
Click to expand...

John: Back to the press,:( lookling at my sector shaft, you need to make a support ( jig ) for the one side, of the pin and push on the other side,,, Grind on an old socket, so it fits the one side, of the sector, so you can hold the pin stright up in your press, heat or boil the oil may help too. ?
As a ":)do-it-your-self,er:rolleyes:".... I would be doing something like this too. :cool:...........OLD.....BILL........:cool:
 
Both ends of the pin are "mushroomed". You need to take a die-grinder and grind the head off of one end of the pin...then it will easily drive out with a hammer and punch.

You will most likely have to (carefully) grind/sand the new thrust washers until you get the roller assmbly to turn smoothly. Then when you are happy with the fit...tack weld both ends of the pin in place in the sector. Just be careful not to lose any of the needle bearings.

Good luck.

Neal
 
i heard there was a problem with the new sector wheel they are a tad big and its coausing some problems mike it up
 
Neal, I read your last posting too late and did not get a carbide grinder - boy your not kidding - those pins are hard. Back to the hardware store.
 
Also, on the heating thing again, why not just put the worm in the oven for an hour at 475 degrees? I guess what I'm saying is, why the oil? Its the heat you want, right?
 
John Mc said:
Also, on the heating thing again, why not just put the worm in the oven for an hour at 475 degrees? I guess what I'm saying is, why the oil? Its the heat you want, right?
Click to expand...

I agree with your idea, but I don't know the true answer. For that matter, why not break out the torch and heat it up?
 
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