This installation of TCS EU621 Decoder is for HO Scale Bachmann model of the English Electric Deltic locomotive and was performed by Robert Lewis.UK.

Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157

This is a Bachmann model of the English Electric Deltic locomotive, commissioned as a limited edition by the National Railway Museum in York. The original locomotive built in 1955  has two  18 cylinder engines with the cylinders arranged in a triangular formation, generating a total of 3,300 hp, the most powerful single unit diesel in the world at the time. It was known as DP1, although it never carried a running number, just the name "Deltic".

To remove the body shell it is necessary to remove the 8 crosshead screws, located in the main underframe, at the corner of each bogie. Once all 8 screws are removed, the body can be lifted squarely off the chassis.


The original blanking plug is shown here inside the red square, gently pull this upwards squarely. For future use it can be stored in the hollow in the casting to the right, held down with a bit of tape.


To install the TCS EU621 decoder align the pins with the decoder and gently push down.

Once fitted, test on the test track before refitting the body. Once tested and programmed, refit the body and the 8 securing screws.


Other solder tips: When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire

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