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Making the X.03 and X.04 DCC fitted, the proper way!


The son of Triangman

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Making the X.04 DCC fitted, the proper way!


To make the X.04 motor DCC fitted the first thing to do after removing a loco body is to remove the suppression capacitor. This should NOT be discarded unless it is to be replaced, a certain online auction site has sellers selling proper replacements. Leave the motor/capacitor securing screw and solder tag that the capacitor was fitted to in place.

Next remove the brush holder spring insulation and put in spares bin, fit both arms with thinner insulation so the pressure on the motor brushes is the same as before. the insulation should go right up to the magnet screw.

You will noticed a feed wire with clip from the pickup plate, remove the brass clip and keep to one side as it will be needed.

The motor should be now isolated from the chassis and supply, a simple multi-meter test will confirm this.

Next acquire another brass brush feed clip of the type that was fitted to the pickup wire feed.

Fit one clip with an orange wire, the other with a grey wire. Wires can be made longer or shorter depending on where you choose to site the decoder. Solder the capacitor across the two brush clips leaving room to fit these clips into place on the motor. Insert the brushes so the insulation is behind them and then insert a brush clip with the attached wire in front of each brush. The orange one on the side where the pickup wire feed ran to. Some people solder directly to the brushes but this can cause problems when you need to change the brushes and is best avoided.

Now we come to wiring up the decoder. A beefy decoder such as the Hornby Sapphire will be required to take the higher current required by the older motors such as the X.03 and X.04. Anti-static handling precautions should be observed to ensure decoder has a long life.

Attach Orange wire from decoder to orange wire attached to the brush clip and the grey decoder wire to the grey wire attached to brush clip, using solder. Heatshrink tubing is best used on wiring joints, insulated tape looses it's stickiness over time.

Next solder a Black wire to the solder solder tag at the back of the motor where the capacitor used to fit and attach to the decoder's black wire and insulated the joint.

Finally attach the red decoder wire to the brown wire running from the pickup plate.

The function wires can be insulated using heat shrink, making sure any bare wires ends aren't touching and finally site decoder.

The brush clips may need to be moved into prefect position and a little tinkering with the motor control wires and capacitor attached to these clips is required, once happy I tend to fix a tiny little double sided self-adhesive pad to the top of the motor and press the wires down onto the pad, with a little superglue to make sure they stay there when the motor gets warm.

One DCC fitted X.04 powered loco, neatly and correctly fitted.


Syncrosmoke will be covered next.

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  • 2 months later...
Hi
in your guide above, para 4 quote 'The motor should be now isolated from the chassis and supply, a simple multi-meter test will confirm this.'
On the loco I am converting (Hornby R055. LMS Class 4P-2-6-4) which has an X.03 motor. The Chassis

is cast so motor in contact completely.
Do you have any ideas to get isolation ? I thought perhaps a strip of insulation tape underneath the motor,but it may throw out the alignment to the drive !!
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Shouldn't need it. By isolating the motor brushes with insulation on both sides of the brush spring you effectively isolate the brushes from the motor frame, also the brushes are held in with a paxolin type material which acts as an insulator. Providing

you have no contact between brush and the motor frame it should be ok. Feed wires (one from the live chassis, the other from the pickups are attached to two feeds clips instead of the normal one) so feed is essentially isolated on one side of the chassis.
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Hi
Open an account (its free) with a photo hosting web site, like Photobucket. Upload your pictures to the hosting site and then

Copy the pictures URL and Paste it into a reply back here. :-)
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  • 2 weeks later...
The son of Triangman's instructions are correct and helpfull. However one line in the instruction: 'The motor should be now isolated from the chassis and supply, a simple multi-meter test will confirm this.' may be misunderstood.
It is the electrical

connections to the motor (brushes) that have to be electrically isolated. The motor frame can still be attached (electrically connected) to the chassis as this has no part in the motor electrical supply.
Hope this helps.

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