AF 360 Woes

Outside of double checking the gauge and making sure there's nothing preventing the rear truck from pivoting, the only thing I can think of is slop in the axle bearings.

Rusty

Sounds like the front truck is pulling harder or better than the rear and causing it to pull up and derail. Though to diagnose and not easy to rectify. Endure both motors are cleaned and lubed and run as clues to the same as each other. Might want to consider replacing the other power trucks vulcanized wheels as well.

Gandy

I think you will find that all dual motored PA's only had one PM wheel per power chassis.

The PM wheel is usually fitted to the axle nearest the brushes and when looking at an upturned PA they are diagonally opposite to each chassis.

As a general rule the, GP's like the UP 372 will have two PM's per axle and these again are fitted to the axle nearest the brushes.

Good points Uk. I found that when the pulmor wheels were installed on the rear of the power trucks, they tended to cause the truck to pull a wheely where if they were installed on the front if the truck they drug the truck which is the desired result. 

Gandy

Thanks guy's, I'll look over all the trucks tomorrow in the mean time I using the old 

AF track with the rubber mats on a rug I think this may be the cause as well, right 

now I'm switching to my Gargraves S track to see if there's any improvement.

Tin 

If you are a floor runner then this more likely to be your problem, the track may appear to be level but will probably have undulations still that you may not be aware of.

Also, being an early PA (360), the motor chassis is fixed tight into the yoke and allows very little flexible movement to compensate for imperfect track.

It is only the latter PA's that have the improved flexibility with a floating truck chassis in the yoke.

Tonight I replace the vulcanite rubber wheels with two new ones, oiled and relubed

and switched my track to the newer Gargraves and it runs a lot better, I'll have 

to clean it all out again soon and recheck everything. Thank you guy's for the info

anything else let me know. These guys are always been a bit more fussy to get 

to run but that's the fun of it getting these old beauty's to get them rolling again.

Tin