Re: [ap-gto] 1200GTO DEC worm thrust washer adjustment


Jan 2

 


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#60268 Jan 2

I am having an issue with the thrust washer (this would be the washer at the end of the worm, that threads into the motor housing assembly, it is flat with two holes 180 degrees apart) for the DEC worm on my 1200gto, it will loosen up for some odd reason resulting in DEC backlash.�� When you move the OTA in DEC, even in park three it goes "chunk chunk".�� I had this problem several years ago and adjusting this washer fixed the problem.

Many years ago either George or Howard at AP told me how to adjust it.�� Of course I have forgotten how to do this so asking if one of the AP wizards might chime in.

A few related questions...is this adjustment done with the motor housing off the mount?I would assume done in park 3 (counterweight shaft pointed down to ground, OTA pointed towards north pole) if done on mount.

Thanks, Mike



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#60273 Jan 2

This is actually a nut, not a washer. It is screwed into the housing and is used to clamp the worm between the two worm bearings, which then removes the end play. Use a small spanner wrench and turn the nut clockwise until it seats fully (until you can't turn it any more). You can put a small amount of torque on the nut but don't go overboard. Here at the factory we torque them to 10 inch-lb (force of 1 lb at 10 inches), which makes them snug without over-stressing the ball bearings.



Rolando







-----Original Message-----

From: mshade@... [ap-gto] ap-gto@yahoogroups.com>

To: ap-gto ap-gto@yahoogroups.com>

Sent: Tue, Jan 2, 2018 7:49 am

Subject: [ap-gto] 1200GTO DEC worm thrust washer adjustment





I am having an issue with the thrust washer (this would be the washer at the end of the worm, that threads into the motor housing assembly, it is flat with two holes 180 degrees apart) for the DEC worm on my 1200gto, it will loosen up for some odd reason resulting in DEC backlash.�� When you move the OTA in DEC, even in park three it goes "chunk chunk".�� I had this problem several years ago and adjusting this washer fixed the problem.



Many years ago either George or Howard at AP told me how to adjust it.�� Of course I have forgotten how to do this so asking if one of the AP wizards might chime in.



A few related questions...is this adjustment done with the motor housing off the mount?I would assume done in park 3 (counterweight shaft pointed down to ground, OTA pointed towards north pole) if done on mount.



p>Thanks, Mike



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