Hello
I own a Loco Diesel shunter 3132 (Henschel DHG 700) (used), pure analog model.
If I have no problem in forward motion, on the other hand, in reverse, it is slow (< 1/2 forward speed) and reaches a plateau very quickly in speed.
My other classic locos don't have this problem.
New motor brushes, greasing and tires.
Any ideas?
Thanks
Phil

Hi
Check the field magnet

Agree. During my test procedure, I remove the body (and the side parts) and it was quieter.
And , yes, this machine is slowly becoming a nightmare to my eyes.
For instance, this is the only loco I have for which I have to remove the body to ensure a proper install of the adhesive tire.
Phil

Phil,

I would try playing with the tension of the springs that hold the brushes. Don't bend them yet, just see if any increased or reduced pressure has any effect. If not leave them alone!

I would go with Rudi on this and suggest that the alignment of the commutator (collector) and armature poles is not quite right. If this is not exactly right the timing will be advanced in one direction and retarded in the other.
I would suggest running it with a multimeter in circuit to measure the current draw and see if it is drawing more current in reverse.
Another test is to run it forward for ten minutes and see how warm the motor gets. Then let it cool and do the same in reverse and see if it is getting hotter.

It may be that you just have to live with it since I wouldn't recommend trying to move the commutator - the wires are very fine and it is very easy to mess it up completely (I know this.... no need to ask how.... :-)

I have a couple of locos that differ in running forwards and backwards - my 3047 BR 44 runs quite slowly backwards - I guess there may have been slight tollerances when the armatures were made.

As regards the noise - I have found a few locos that are noisy when running with the bodies on (e.g. 3000) can be improved a bit by keeping the body securing screw slightly loose.