Upgrading locos with original 3 pole motors to 5 pole is up to each of us to decide with consideration for the cost and benefit, some locos improve greatly from the upgrade others less so. Marklin’s magnificent 88833 is one loco that I recommend the 5 pole motor upgrade for improvements to slow throttling, not much difference in sound level between the 3 pole and 5 pole which seems to be more evident in plastic shell locos.
The Marklin 88833 class 150 Y for SNCF was a “One Time Series” from 1998, it’s standard motor was the 3 pole #268850. The 5 pole motor replacement is E211915. Construction of the two motors varies little except for the motor housing which is clear in the 3 pole and opaque black in the 5 pole. Changing out the motors is easy, but you will need a basic knowledge of soldering which factors into this repair.
Note: use the correct size screwdriver for the two screws which are accessed in this repair. Also use care to remove these screws without scratching the heads or stripping the threads: DO NOT OVER-TIGHTEN.
Steps for success:
- Carefully remove single screw that holds shell to chassis and set aside.
- Notice capacitor wires are soldered to pick-up leads, carefully un-solder these two contacts.
- Unscrew motor from chassis.
- Carefully slide motor off loco frame.
- Notice brass bushing near drive gear on new motor.
- Also notice clip on bottom of new motor, this clip will engage with loco frame and help with alignment.
- Notice gear on loco that engages with gearing to wheels, this gear’s rod slides into brass bushing on motor and automatically should allow for engagement of the two gears.
- Gears may need to be turned slightly for engagement (new motor will slide into place easily).
- When the motor is correctly installed with gears turning freely and no gaps between motor housing and loco frame install small screw.
- Solder capacitor wires and pick-up contacts on loco frame.
- Place very small drop of light synthetic oil to motor bearing.
- Test loco on track.
- Attach shell!