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Electrical pick up points modifications.

The PA-1 and PB-1 are great units but I noticed a small problem which is easy to solve.

I run a PA-1 and PB-1 unit on my layout. I noticed that the units could not hold speed. Oke it is my fault but I run DCC, this means track power. I also like the tires. This is because I run a set of 8 unit streamliners. I have another set PA-1 and PB-1 on order but in the meantime I run the set with 2 units.

After examining the problem I found the metal pick-up points not touching the rail. When I received the locomotives I bended the pick-up points at 90 degrees angle which they where not at the time of purchase. This is because I expected problems on turn outs.

I have done some modifications to get the pick-up point at a 90 degrees angle at the track. Made some trials today and it seems to work. The units run smoother now.



No contact of the electrical pick up pint to the rail.



After the modification the electrical pick up point rest on the rail.

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When my new motor block arrived, I noticed some changes to the old one. These are done by USAtrains.



No notches on the old motor block cover.



New cover with added notches.



Also noticed some changes on the pick up points.

The left is old. The middle modified by me. And the right one is out of the new block. Due to a longer spacing the pick up point can lower a bit more. But it is still not enough.

The reason is that by lowering the point the spring brings not enough tension to rail so that a constant reliable contact is available.



When you machine a longer slit you have a pick up point that is a bit loose on the motor block.

Here are the notches for on the cover plate of the motor block.



Notice the screwed metal parts with black lead on it.



Take out the screw.



Lift out the metal plate.



Take some washers and lay them under the contact points.

This is needed to bring more pressure under the spring.



Solder the lead to the under side of the plate by using a soldering iron.



Solder them under the plate. This because of lack of space, left under the cover plate.



Now we have brought up the pick up point a bit. This will bring a bit more tension to the spring and there for to the rail.



These two pictures show clearly the difference in height of the pick up point.



And that the points are sticking out over the wheel.

Don't forget to take a bit out on the rim of the cover of the gear box. Because of bringing the contact point up; the rim has to be modified. I forget to take a picture but is shows for it self. Take good care that the bearings are in place



Rectangular on top of the main bearings.



Take notice of the bearing position.