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On The Workbench A place to show what you are building, altering, kit bashing etc


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Old 31-08-2017, 10:31 AM   #1
Steve M
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Default Dapol 'Black Label' A4

At the start of this thread let me say that I have no idea how it is going to end.
A friend has lent me a Dapol Black Label A4 to test - it has a small amount of cosmetic damage and no idea if all the functions actually work, so it may end up as a supply of spares for other A4s but in the meantime it's good to finally get my hands on one.

IMG_1294 by Steve Mumford, on Flickr
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Old 31-08-2017, 10:37 AM   #2
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That's at least three of us looking forward to finding out more then R-
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OO Gauge : Train Controller Gold via Elite : Block sensors via CTI : Servo motors for points : 9 Locomotives
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Old 31-08-2017, 10:40 AM   #3
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First read the instructions as these models have lots of 'bells and whistles' - literally.
It's been on a short length of track and tolling road on the workbench hooked up to my DCC controller and checked that it actually moves - a bit jerky but a clean of the wheels sorted that out.
While it was there, I ran through the various sound and lights functions - all seem to work well with the sound being very good (my opinion). I will report in more detail on these later.
The main feature of this model is it's ability to produce smoke from the chimney and steam from the whistle - but only a very small amount of 'steam' and no smoke from the chimney (although it did seep out from under the chassis).
This is now going to turn into a strip down and (possibly) repair.
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Old 31-08-2017, 10:49 AM   #4
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First step is to check that the smoke switch is 'on'. It's located at the front and is partially obscured by the front bogie.
First potential problem identified - it is swimming in oil from the smoke unit. So I'm thinking over oiling and possibly some short circuiting or even insulation of electrical contacts.

20170831_101211 by Steve Mumford, on Flickr
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Old 31-08-2017, 11:04 AM   #5
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Body removal.
The tender just hooks on to the loco but there is a small electrical plug that needs to be unplugged. I'm a little surprised that the tender is not permanently connected by a screw on drawbar - if it becomes unhooked the pull will be directly on the wires.
The loco body is held on with about half a dozen easily accessible screws - once released the cast metal body slips off but be careful there are lots of very thin wires connecting the body to the chassis.
In the photo I have already unplugged the on/off switch previously mentioned.

20170831_094143 by Steve Mumford, on Flickr
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Old 31-08-2017, 11:41 AM   #6
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There are two small multiplugs directly underneath the two fan motors that need to be released. I marked one with a pen to tell them apart but once unplugged I realised they are different sizes.
The chassis now looks like an explosion in a spaghetti factory.

20170831_100939 by Steve Mumford, on Flickr
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Old 31-08-2017, 11:56 AM   #7
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This reveals the channels for the oil/smoke that fit in to a similar moulding under the chimney. There is quite a lot of crud in here and one of the holes may have initially been completely blocked. The two parts of the moulding may once have been sealed with what likes like dry PVA - it flaked off when prodded.

20170831_095217 by Steve Mumford, on Flickr
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Old 31-08-2017, 12:01 PM   #8
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Undo the four screws (three long, one short) on the smoke pcb and the fan motors will fold back. The housing for the wadding over the heater elements is a straight pull, don't twist it.
This housing doesn't appear to be sealed to the pcb so oil can leak out onto the chassis and the on/off switch below it. You get an idea of how much oils is sitting in this thing.
Be careful, there are three very small nuts in the housing.

20170831_095947 by Steve Mumford, on Flickr
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Old 31-08-2017, 12:08 PM   #9
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Last one for today. I've scraped out much of the carbon that had built up in the flue and given the whole lot a thorough dousing with electrical switch cleaner.
I'll now leave it on the bench overnight to completely dry out before inspecting everything again. I suspect it will get another spray and dry cycle tomorrow.

20170831_100437 by Steve Mumford, on Flickr
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Old 31-08-2017, 12:21 PM   #10
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Well done Steve, a interesting thread. Thank you.
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