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Post by stillinlovewiththis on Oct 24, 2021 10:10:12 GMT
Hi everyone, despite numerous searches on this forum I don’t seem to be able to find the answer I am looking for. Our beautiful jukebox is playing slightly slow. I’m looking to see if it’s possible to adjust the motor speed. On page 8 of the troubleshooting chart for the 2400 series, it suggests the service call would be poor tone quality and the symptoms would be a waver in music.
Is the procedure listed the right way to start here?
I’ve already fitted a new belt and cleaned the pulley wheels.
Your suggestions would be appreciated.
I have the official manual for this model.
Thanks,
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Post by Ron Rich on Oct 24, 2021 12:52:49 GMT
Hi Richard,
There are no "adjustments" available for that motor's speed. Have you properly oiled ( BOTH OIL WICKS !!) it with a 20 wt. ND oil ? Did you oil the two "oil holes" in the motor drive train-- the "ball" ? Is the new belt the proper one ? Are the motor mounts good ? Have you oiled the turntable assembly ?
Ron Rich
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Post by stillinlovewiththis on Oct 24, 2021 22:10:39 GMT
Thanks for the reply Ron. Sadly, I’ve done very little over the years and I believe this is going to haunt me. I’ll go through the manual tomorrow and do my best to do as you say. The belt was new to the original spec. I’ll try to do a simple speed test as well and let you know how I get on.
Again, thanks for the reply, it’s appreciated.
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Post by stillinlovewiththis on Oct 25, 2021 10:26:54 GMT
I can only find one lubrication tube. Any idea where the other one is located?
The one I’ve found is directly above the motor drive shaft.
Thanks.
(Will add a photograph, I’m out at the moment)
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Post by stillinlovewiththis on Oct 25, 2021 10:30:01 GMT
Sorry, I meant to mention, I’ve been through the manual and oiled/greased everything I should have done.
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Post by Ron Rich on Oct 25, 2021 13:51:12 GMT
Hi Richard,
Greased ? That may be part of your problem-- greases don't always mix well, did you remove ALL of the old stuff first, before applying new stuff ? Sometimes old and new grease will combine to make good glue--- The motor has one oil tube for the inside bearing-- the outside bearing has no tube--you must saturate the visible felt pad. There are also two oil holes in the shafts that the gears driven by the motor ride in-- those must be oiled-- the "ball bearing" on the inside of the motor area is visible--it must have oil applied to it. There is also an "oil hole", in the top of the turn table shaft-- it looks like a nut, with a hole in it-- saturate that hole with oil -- Ron Rich
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Post by stillinlovewiththis on Oct 25, 2021 14:53:22 GMT
Thanks for the detailed explanation. I’m on it now. No time constraints.
Thank you.
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Post by Ron Rich on Oct 25, 2021 15:00:46 GMT
Hi Richard,
You are welcome-- hope it corrects that problem ! Ron Rich
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Post by stillinlovewiththis on Oct 26, 2021 11:17:30 GMT
Okay, here we are, 6 hours later…
I’ve found all the oil pipes and holes except the “ball bearing”. Although I feel I’ve oiled every section from the motor to the “nut hole” on the turntable shaft.
I’ve also had a look at the drive belt tension. It’s tensioned to the maximum it can be so I’ve ordered a new genuine belt from a Wurlitzer supplier, rather than eBay (where the last one came from).
I’ve done a very rough speed test and a 3’45 single played 6 seconds slow. If you didn’t know the track well, potentially you might not notice it was slow.
Todays question which the manual doesn’t cover, “how tight should the belt be?”. Obviously the one I have is in maximum adjustment so I can’t tension it further. When I fitted it I just replaced the one I took off and in effect I’ve stretched it to the same length as the old one through my stupidity and ignorance. When the new one arrives I’ll obviously back off the adjustment to the minimum and set the deflection.
Anyone any idea what the deflection should be?
Again, thank you.
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Post by jukenorman on Oct 26, 2021 13:01:50 GMT
Hi Richard,
Maybe you can provide some history - has your jukebox turntable always run slow? The main reason that I ask is that, because I see you are in the UK, the original 60Hz pulley will have been changed to a 50Hz pulley (assuming a frequency converter has not been fitted?). I have often found some of these 50Hz pulleys to have been badly made size wise.
If you sign up to the BJO Forum at groups.io, you will be able to download and print off a 50Hz strobe disc (stick it on to an old 45 record).
Norman.
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Post by Ron Rich on Oct 26, 2021 13:31:10 GMT
Hi Richard,
Seems to me they run 'tight", but not to the point of being stretched-- hope that helps-- one other thing-- are the motor supports holding that motor correctly--zero "sag"-- can you post a photo of that motor assembly--might "jog" a memory ?? Ron Rich
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Post by stillinlovewiththis on Oct 26, 2021 14:12:02 GMT
The belt isn’t tight. There’s easily 12mm (1/2 inch) deflection. Like I mentioned I’ve got a new one on the way and I’ll back the adjustment off this time.
Here’s the photographs of the motor. I’ve removed and refitted it this morning. I think it’s fitted as it should be.
Someone’s already been in here as there was a star washer missing from one of the nuts.
It hasn’t been very well looked after in my opinion as there’s a few substandard repairs here and there.
Just looking how to add images?
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Post by stillinlovewiththis on Oct 26, 2021 14:29:53 GMT
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Post by Ron Rich on Oct 26, 2021 14:36:33 GMT
These links don't work for me ? Ron Rich /see our FAQ's section on posting -- Ron Rich
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Post by stillinlovewiththis on Oct 26, 2021 15:04:45 GMT
I’ve edited the post and redone them.
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