Dual 1228 doesnt stop when lever moved to "Stop"

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dbxdx5
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Dual 1228 doesnt stop when lever moved to "Stop"

Post by dbxdx5 » 14 Dec 2016 20:27

I've managed to clear up all of the issues with a 1228 I bought except for one: Moving the control lever to "Stop" during playback has no effect. From what I've observed, the Start Lever (185) isn't fully engaging with the Change Lever (189) when the latter is moved to Stop, i.e. the metal tab of the Start Lever moves into the "Stop" slot on the Change Lever but doesn't move all of the way in. Any ideas appreciated.

Matt

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by jdjohn » 14 Dec 2016 21:54

Hi Matt,

Did you take apart all the levers and give them a good cleaning and relubing? Sometimes that grooved pin (191) can get corrosion on it as well, which will prevent the levers from pivoting properly. After removing the clip from the top of the pin, you should be able to lift the levers up and off. If you can't, then there is corrosion that you probably can't see. The pin itself should be removed and cleaned, but be careful since, besides nut (183), the pin has another set of threads that go directly into the chassis (if I recall correctly), so you have to unscrew it as well...thus the slot on the end :) Of course you'll also want to make sure the slot in lever 185 is moving freely and lubed so it can slide and the spring (184) can do its job properly.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dbxdx5 » 14 Dec 2016 22:32

I had removed the Change Lever (189) and cleaned it along with the slotted pin (191), but only up to where it meets the Shifter Arm (187), which I did not remove. So sounds like I should remove 187 as well in order to completely clean it and 191.

Re the slother in the Start Lever (185), it does move freely, though I don't see evidence of any old lube and hadn't thought this needed any. Apply a little grease between it and the metal underneath?

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by jdjohn » 14 Dec 2016 23:19

Yeah, that shift arm needs to be able to pivot fairly freely, and there's a washer between it and the start lever that could probably stand cleaning as well. I would say anywhere there is metal-to-metal contact, a little grease is in order...but only a little! Less is more.

As you have discovered, the machinery of these decks is basically just held together with clips and springs, so it is imperative that everything moves freely; even the slightest resistance can cause a problem.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dbxdx5 » 15 Dec 2016 16:27

I cleaned and relubed the levers and yet the problem persists. If I use my finger to nudge the lug of the Start Lever (185), it will move into the stop position on the Change Lever (189) and the motor will stop. Otherwise it remains about halfway as indicated by the arrow in the photo below. Could it be that the alignment of the two levers is either slightly off or the spring (184) is stretched?
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lever2.jpg
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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by mrow2 » 15 Dec 2016 16:50

I found a miniscule bur on one of these which caused the problem. But if I also recall the SM doesn't call for lube here, but I also lube mine and usually find old grease there too. The parts should be thoroughly cleaned first if you choose to grease it, after checking for tiny imperfections which could cause it to hang up (these parts are stamped and cut). The pivot point bearing, entire shaft, must be cleaned and free of old grease. I don't think there is an alignment issue, there is plenty of play in these levers. It's about cleaning and smooth surfaces.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dbxdx5 » 15 Dec 2016 17:24

I hadn't thought of a burr, but it makes sense. I've cleaned everything thoroughly (several times), so I'll check for any surface imperfections next.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by jdjohn » 15 Dec 2016 17:50

Matt,

You've mentioned the motor not stopping, but is the tonearm action okay after flipping the 'stop' switch lever? Does the arm go back to the rest properly, but the platter just continues spinning?

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dbxdx5 » 15 Dec 2016 18:16

The tonearm remains over the platter. It isn't until I nudge the lug fully into position that the entire stop process begins, including the tonearm moving back to the rest.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by jdjohn » 15 Dec 2016 18:32

When you say 'over' the platter, do you mean 'on' the platter, or album? Are you lifting via the cue lever first, and then flipping the stop lever? It shouldn't make a difference for your problem, as the stop lever should initiate either way, but just trying to clarify here. Also, does the auto-return work properly at the end of a side without any assistance?

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dbxdx5 » 15 Dec 2016 18:49

Happy to clarify. I mean on the record, playing. I'm not lifting the cue lever first, and yep, the auto return works fine. I would say that I'm 90 percent certain that the culprit is the lug not engaging.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dualcan » 15 Dec 2016 20:58

Hi,
If 185 does not seat properly within 189 when Stop is engaged, then make sure 185 is free to move around extension nut 183. Only spring 184 gives the force to move 185, so 185 needs to be very clean and the lube minimal. Check for pliers marks if these parts (211,189,185,187) were bent as well. I have seen part 211's shaft that engages 189 loose and therefore not giving full swing to 189 as well. Removal and cleaning of shaft pin 191 is always a good idea.
Regards,
k

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by DSJR » 15 Dec 2016 23:24

It may be my laptop display, but that grease doesn't look like Alvania to me..... Too much? in any case I think too.

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dualcan » 16 Dec 2016 00:21

Hi,
There is a 1228 restoration on my website under service tips. As can be seen, the lube should be very minute. This is readily visible in this restoration.
Regards,
k

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Re: Dual 1228 doesnt stop when lever moved to "Stop"

Post by dualcan » 16 Dec 2016 00:22

Hi,
There is a 1228 restoration on my website under service tips. As can be seen, the lube should be very minute. This is readily visible in this restoration.
Regards,
k

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