Could it be that the problem is with the pick-up shoe ?

Edited by user 29 July 2024 21:28:14(UTC)  | Reason: Not specified

Hi Ranjit
I agree with Harold. First the loco is not lubricated and make awful noises.
The video does not allow to show the skidding issues.
On a clean and flat track a Märklin loco with good tires is difficult to push.
New, clean traction tires must NEVER be contaminated with oil. So clean the track first, oil very sparingly using a seringe and then replace the traction tires.
Make sure they are RECENT (not manufactured LONG time ago) this is because rubber hardens itself and loses the grip force.

One last recommendation: use the proper size tire:
- smaller tires will cause streching of the tire and so to become too small into the grove and NOT making good contact with the rail
- larger tires will not grip the wheel and rotate somewhat freely.

Yes on some locos you may prefer not to change the tires so what can you do?
Install the loco, upside down on a foam bed and apply power and set the wheels to turn
With a cotton swab damped into Isopropyl alcool, rub gently the rubber tires
If the tire rotates freely in its grove, sorry you MUST replace it.
Cheers
Jean