Rewiring Marklin 8871 and 88711: ICE trains go fast!

Marklin’s 1990’s releases of the TEE 8873 and ICE trains 8871 and 88711 suffer from a design flaw: poor electrical connections caused by the couplers and a train set wired in parallel. Similar to those old Christmas lights when one bulb went they all did, these Marklin train sets suffered a similar fate that was corrected with the further releases of the TEE variations. The ICE train sets changed in another way instead of having two powered units as did the 8871 and 88711 the 88712 and 88714 included one powered unit located in the middle of the train this being a coach.

A simple solution to to correct the poor performance of the three TEE and ICE trains is to bypass two diodes located on each circuit board of the powered units. There are four diodes located on each circuit board, two affect the lights (LED’s) and two are near the motor. Bypassing the diodes near the motor with a soldered wire is all that is needed to allow the locomotive to move forward and reverse thus allowing each powered unit to work without the former wiring constraints.

Note: no need to bypass the diodes on any other TEE train version released after 8873.

Note: 30 gauge wire is recommended for wiring circuit board, tinning the ends of wires is recommended before making the soldered connections.

The early ICE trains use an interesting light bulb with a red and a clear bulb soldered to a circuit board similar to the traditional mini-club bulb. The red bulb is hooded to direct the light better, but unlike the LED’s the light is rather dim unless the loco is cranking! Note: very fragile bulb and no longer available, but if you are good at soldering you can make your own.

The couplers as mentioned are faulty for electrical connectivity, but work great when both powered units are rewired: coach lights no longer flicker. The couplers for the two ICE trains are susceptible to damage due to the untethered ends of the copper strips, great care should be taken to prevent bending. A good recommendation is to stock up on parts as they become available on Ebay. The original couplers for the 8873 are infinitely more resilient than the couplers used on the first two ICE trains.

Note: save old loco light bulbs that don’t work, new ones can be easily made by using the original circuit board for soldering news bulbs to them, generic bulbs are available at train shops in the correct size.

Siding: the 5 pole motor replacement for the 8871 + 88711 is 211907 which is one of the more expensive motors for upgrade, and you will need two. I have not made the upgrade to 5 pole with my sets, the original 3 pole motors work exceptionally well at low speed and throughout the range, but the 5 pole motors would be much quieter.

Siding: removing the tight fitting shells from 8871 and 88711 is more easily accomplished with synthetic guitar picks of .70 mm thickness or thinner.