 Joined: 17/12/2022(UTC) Posts: 5 Location: Stockholms lan, Stockholm
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So i just got this 7186 turntable witch does not seem to have been used in a long time (a lot of dust on it)
it didint have the little blue controler so i used a normal blue little switch control box (1 for left right and one button for the little finger ) and it worked albiet its very noisy (guess thats to be expected though) but i had to hold down the directional button didint see the people have to do that in the videos i found online
now to the real question here
i opened up the little house so i could put some oil on the gears
i then figured i should turn it
and i noticed what looked like sparks from the engine is that normal?
kinda looks like a small light
should i replace the brushes ?
is the sparks in the motor area just the engine burning off old dust?
is it normal for it to spark??
all help aprichiated thanks
thanks in advance
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 Joined: 04/02/2011(UTC) Posts: 3,559 Location: Paris, France
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Hi Jonsson01 (a first name would be ideal) Welcome to this great forum. Originally Posted by: jonsson01  So i just got this 7186 turntable witch does not seem to have been used in a long time (a lot of dust on it)
it didint have the little blue controler so i used a normal blue little switch control box (1 for left right and one button for the little finger ) and it worked albiet its very noisy (guess thats to be expected though) but i had to hold down the directional button didint see the people have to do that in the videos i found online
now to the real question here
i opened up the little house so i could put some oil on the gears
i then figured i should turn it
and i noticed what looked like sparks from the engine is that normal?
kinda looks like a small light
should i replace the brushes ?
is the sparks in the motor area just the engine burning off old dust?
is it normal for it to spark??
all help aprichiated thanks
thanks in advance The 7186 turntable (TT) is very noisy but a little lubrication may reduce the noise The 7186 per-se has no lamp inside but its predecessour the 410 NG had one. Here is mine, opened and in operation. If the brushes are worn out or very dirty then they should be replaced (nominal length is approx 5 mm). Replacement is Märklin E600300. If the TT was stored for a long period then the collector may need some activity but even when clean, you may see a tiny blue spark around the brushes. The blue control box you miss does 2 things - send the 16 VAC to either of the induction coils (sets the direction) to one of the 2 extreme contacts. This can be replicated with a simple SPDT switch - send a 16 VAC impulse to the contact in the center to unlatch the TT and get-it started to the next track Although noisy, the mechanism is a piece of art with 2 clutches, a latch arm and an unlatching solenoid. Cheers Jean |
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 2 users liked this useful post by JohnjeanB
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 Joined: 02/02/2017(UTC) Posts: 694 Location: England, South Coast
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If the motor sometimes runs on after the 'bridge' has latched is the only adjustment I can make at what I think are the solenoid points?
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Joined: 04/02/2011(UTC) Posts: 3,559 Location: Paris, France
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Originally Posted by: Michael4 If the motor sometimes runs on after the 'bridge' has latched is the only adjustment I can make at what I think are the solenoid points? This is not a normal behavious. Why? When the latch comes into place, it does a few things - stops mechanically the transmission IMMEDIATELY preventing it of going past the stop point. The motor may continue on its inertia a little but the clutch takes over. - cuts the power to the motor So in your case, the finger latching the transmission (preventing its rotation) may be out of adjustment  Cheers Jean |
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Joined: 02/02/2017(UTC) Posts: 694 Location: England, South Coast
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I've had the thing for forty years but have never really investigated it. Using your diagram (thanks!) I'll sit down under a bright light and watch what it does.
(For those in the UK it came off the second hand shelves in Beatties in London...)
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Joined: 17/12/2022(UTC) Posts: 5 Location: Stockholms lan, Stockholm
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Originally Posted by: JohnjeanB Hi Jonsson01 (a first name would be ideal) Welcome to this great forum. Originally Posted by: jonsson01 So i just got this 7186 turntable witch does not seem to have been used in a long time (a lot of dust on it)
it didint have the little blue controler so i used a normal blue little switch control box (1 for left right and one button for the little finger ) and it worked albiet its very noisy (guess thats to be expected though) but i had to hold down the directional button didint see the people have to do that in the videos i found online
now to the real question here
i opened up the little house so i could put some oil on the gears
i then figured i should turn it
and i noticed what looked like sparks from the engine is that normal?
kinda looks like a small light
should i replace the brushes ?
is the sparks in the motor area just the engine burning off old dust?
is it normal for it to spark??
all help aprichiated thanks
thanks in advance The 7186 turntable (TT) is very noisy but a little lubrication may reduce the noise The 7186 per-se has no lamp inside but its predecessour the 410 NG had one. Here is mine, opened and in operation. If the brushes are worn out or very dirty then they should be replaced (nominal length is approx 5 mm). Replacement is Märklin E600300. If the TT was stored for a long period then the collector may need some activity but even when clean, you may see a tiny blue spark around the brushes. The blue control box you miss does 2 things - send the 16 VAC to either of the induction coils (sets the direction) to one of the 2 extreme contacts. This can be replicated with a simple SPDT switch - send a 16 VAC impulse to the contact in the center to unlatch the TT and get-it started to the next track Although noisy, the mechanism is a piece of art with 2 clutches, a latch arm and an unlatching solenoid. Cheers Jean Thank you that answered most of my questions Saw quite a lot of spark in the engine but that seems to be normal I figure it just need to be “worn in” again Tested another old ac lok. from märklin witch haven’t moved in a while and it had some wierd noises witch disaperead after a bit of driving I guess that’s just normal for these older things?
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Joined: 23/07/2014(UTC) Posts: 8,469 Location: ENGLAND, Didcot
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Originally Posted by: jonsson01
Tested another old ac lok. from märklin witch haven’t moved in a while and it had some wierd noises witch disaperead after a bit of driving
I guess that’s just normal for these older things?
That sounds like it probably needs a drop of oil on the motor bearings and the gears. It won't need much at all, just enough to moisten the little sponges on the motor bearings.
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Joined: 17/12/2022(UTC) Posts: 5 Location: Stockholms lan, Stockholm
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Ah
Ill try that
Do you know if the 7186 turntable Will run on dc?
Does all older märklin ac engines work with dc?
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Joined: 04/02/2011(UTC) Posts: 3,559 Location: Paris, France
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Originally Posted by: jonsson01 Ah
Ill try that
Do you know if the 7186 turntable Will run on dc?
Does all older märklin ac engines work with dc? Question 1 yes no change needed with the original blue control box. Question 2 yes in conjunction with diodes (one for each inductor wire but the 2nd one in opposite direction to the first.),replacing the direction relay Cheers Jean |
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Joined: 17/12/2022(UTC) Posts: 5 Location: Stockholms lan, Stockholm
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Question 1 yes no change needed with the original blue control box.
Is this referring to the original 2 button direction controller that is (should be I’m missing mine though )included with the turntable?
Since im missing mine I use 1 normal control box and using the red and green button for directions (on first row) and a red button for the little impulse to the “finger” of the turntable and it works fine
I don’t see why that would not be able to work with16 v DC (assuming the actual engine of the turntable and solenoids can work with DC instead of Ac witch was the question I tried to ask )
Since it works fine with 16v AC
TLDR
Q can I hook up the turntable to 16v DC
Will the solenoids and motor work with Dc?
Q2 i also own an old automatic railroad crossing that was made for Ac
Tried to hook it up to my digital layout by supplying it from the rails (witch is supplied by the new digital system with ms2) but it (from what I’ve read up on and seen myself) too much power and there fore power is shutdown by the ms2 because it senses a power surge (witch I belive is to minimize the damage done by surging currents in an event of a wagon short circuiting something)
Is there. Way to fix this so it can be run in m digital layout?
Very sorry for the very long text of questions (and also ironically enough a long tldr )
/Hampus
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Joined: 04/02/2011(UTC) Posts: 3,559 Location: Paris, France
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Hi Hampus Here is the drawing of the 2-button blue control.  It is very simply replaced with on SPDT and one push button Principle: the SPDT selects the rotation direction and the push button "unlocks" the TT to the next track. Questions Answers: - Q1 yes the TT will work with 16 VDC instead of 16VAC. The solenoid current will be a little higher but you are not supposed to push very long on the button. - Q1a yes you can have digital locos run on the TT in digital - Q2 connection of an old automatic railroad crossing is OK in digital (a) having a detection section (one isolated rail on both sides of the automatic railroad crossing and (b) connecting the yellow plug of your crossing to the yellow of ANOTHER 16 VAC transformer while its brown is connected to the digital brown (the non-isolated rail) - the above-suggested connections do not take any power from your MS2 and its supply so it MUST NOT be no shutdown by the MS2 WARNING: NEVER try to use the digital power supply (that feeds your MS2) to feed SIMULTANEOUSLY another circuit (the TT or the crossing) as you will burn your digital system (the track box) Cheers Jean |
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Joined: 17/12/2022(UTC) Posts: 5 Location: Stockholms lan, Stockholm
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Thanks for the great answer Just one last think to clear up Originally Posted by: JohnjeanB
WARNING: NEVER try to use the digital power supply (that feeds your MS2) to feed SIMULTANEOUSLY another circuit (the TT or the crossing) as you will burn your digital system (the track box)
Cheers
Jean
Do you mean that the ms2 track box will draw to much power if trying to feed another circuit and burn out? Also can I feed the old railroad crossing with 16vDc. And use the trackboxe,s zero? Would that work?
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Joined: 04/02/2011(UTC) Posts: 3,559 Location: Paris, France
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Hi Originally Posted by: jonsson01 Do you mean that the ms2 track box will draw to much power if trying to feed another circuit and burn out?
Also can I feed the old railroad crossing with 16vDc. And use the trackboxe,s zero?
Would that work? No, this is not a question of power but rather of forcing a high current through the digital drivers (power transistors) that would destroy them if you don't keep the MS2 : Track box power supply dedicated only to feed them.Yes you can feed the old railroad crossing with 16vDc (separate power supply). And connect the trackboxe,s zero to one of the poles of the other PS Unit. Cheers Jean |
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