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Post by prime on Aug 13, 2022 21:59:23 GMT
I have a R and a J they are almost the same, i hope someone here will help with this, i just got the J and find there is an issue between mech and motor, if i try and turn coupler on motor it is very difficult. If i try scan it turns the coupler about a 1/4 of an inch each time i move the scan switch, ive oiled the two ports of the motor, the gears that turn with the coupler and between turntable and chasis. Is there anywhere else that can impede the motor? is there any other reason the coupler would be difficult to turn. thanks pete
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Post by jukeboxmarty on Aug 13, 2022 22:16:35 GMT
I've seen the turntable worm shaft get almost locked in place due to the lubricants hardening.
I would try to remove the bearing housing (it's really called the bearing bracket assembly) by loosening the four screws that hold it in place; then lift upward. Once removed you can get the oil on the shaft where it needs to be.
MAKE SURE there is nothing else binding within the carriage which may prevent the gears from turning. You don't want to strip your main fiber gear!
I'd also make sure the motor is not binding.
Keep in mind if you get this freed up the balance of the mechanism has the potential of being equally 'gummed up'.
-Marty
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Post by prime on Aug 13, 2022 22:58:40 GMT
Are we talking the 4 screws on the top? what about the 2 screws to the right of the large gear? thanks pete
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Post by jukeboxmarty on Aug 14, 2022 0:28:35 GMT
The two screws hold the thrust plate, which secures the turntable shaft from lateral movement. In my experience the turntable shaft doesn't get so stuck it 'locks' up. Although it too needs lubrication. Yes, the four screws on the top (if we're talking about the same thing). Do you have a manual? The manual calls it the 'bearing bracket assembly' (part 40), it's shown on the Frame Assembly parts diagram.
BTW: Don't loose the ball bearing that sits on top of the worm shaft, it may fall out.
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Post by prime on Aug 14, 2022 3:30:22 GMT
Thanks for your help, removed screws and oiled everywhere, it is now moving well, will re oil tomorrow but i think its working well now. pete
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Post by jukeboxmarty on Aug 14, 2022 4:25:21 GMT
Fantastic! It's hard to believe what can get stuck on those mechanisms!
-Marty
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