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Re: steering box side cover on 641

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Author  [Modern View]

11-10-2012 15:56:05

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have you got the sector arms off?

they have to come off

the adjusters are studs in a slip fitting on the sector

the sector gear and cover exit out the same path.. which is why the sector arms must be off the other side.

i've marked up a drawing of the steering box on a 640

the side covers have a lip inside .. it may be siezed a pit. tap on the ears to rotate them and get themmoving.

penetrant will help.. just pull them and the adjusters togeter dragging the secrtor gear out. if they are seized it will be the easiest way..

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11-10-2012 16:37:23

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 Re: steering box side cover on 641 in reply to soundguy, 11-10-2012 15:56:05  
i was under the impression i could just pull the sector gear out a little and leave the sector arms on and that would allow the center shaft to be removed giving me access to the lower thrust bearing and room to clean out the bottom of the box. the seals on the sector shafts do not appear to be leaking any and i don't plan on replacing them. please correct me if i am wrong! thanks again.

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Keith Williams

11-11-2012 05:38:37

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 Re: steering box side cover on 641 in reply to kentrx1, 11-10-2012 16:37:23  

"the seals on the sector shafts do not appear to be leaking any"

Hate to tell ya this but they are not leaking cause there wasn't any lube in there!
Those seals are what goes first. Then the lube comes out. Then the bearings go!! A few wash jobs and any trace of the old lube is long gone.

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11-11-2012 11:47:03

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 Re: steering box side cover on 641 in reply to Keith Williams, 11-11-2012 05:38:37  
it had quite a bit of oil in the box actually. was probably 90 weight and very dirty with some water mixed in, but was not empty. no sign of leaks at side seals....they were both dry.

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11-10-2012 17:18:41

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 Re: steering box side cover on 641 in reply to kentrx1, 11-10-2012 16:37:23  
you might cheat both sector gears out enough to pull the ballnut assy.. however you are 95% of the way there doing so.. why not just pull them?

i thik your course of action will turn a routine rebuild job into a hard one..

your call.

I've rebuilt many of these boxes.... generally not difficult.. about the biggest issue is sometimes cheap chinese bearing cages that crumble.. OE.. ballnut assy that are soo worn the ballut cocks to the side.. or sector gear teeth profiles that wear to a point.. etc. broken adjuster stud holder ears.. etc.. stuff like that.

otherwise they are pretty bulletproof. and straight forward to service

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11-10-2012 17:28:32

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 Re: steering box side cover on 641 in reply to soundguy, 11-10-2012 17:18:41  
thanks soundguy. your help is much appreciated!

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