i had to remove the power pick up assembly from my 2023p locomotive to inspect The wire carrying electricity from the pick up rollers to the unit. It seemed that the insulation might’ve been rubbed and was shorting out against the frame.
I believe I’ve taken care of that problem but in reassembling the pick up roller assembly on to the truck, I am unable to get the assembly as “close up” as it had been originally to the bottom of the truck. I can See that immediately by the fact that you can actually see into the cavity that is within the truck. Further the Spring loaded pick up roller support arms are not as close to being in the same plane as they usually have been. There is no question that they had had a slight angle to them but now that angle is considerably more pronounced. Lastly something about the way I reassembled the pick up assembly onto the truck it’s taking noticeably greater vertical height and as a result the wheels are not sitting all the way down on the rails. The pick up assembly is taking up some vertical height that it had not before.
the pick up assembly screws to the truck by means of two screws which go through two Fibre Washers And then pass through a non-metallic rectangular piece which is contoured to sit in a cavity in the truck. Th e wire which carries the electricity to the e unit connects By means of A solder lug to a piece of copper inside the power truck. I can’t tell what I have done incorrectly, but something about the way I positioned these various elements is taking up more height than the design allows and I am unable to get the unit to sit on the tracks with all wheels making contact as they should.
What’s wrong?
It sounds like the parts are not being reassembled properly.
See here for a pictorial diagram of the truck and roller pickup. It should go together properly if everything is intact and in good condition.
Larry
ok drawing was helpful. thnks v much. loco is running again; disassembled andreassembed and all problems disappeared as if by magic
One wire (from the 'E' unit) goes to the roller pickup, and the other wire (from the coupler) goes to the collector shoe and gets soldered to the solder lug on top of the shoe spring.
You can save a copy of the service manual pages to your computer and print them out if you have a printer hooked up to your computer.
re service manual pages,iknow olson'shasthemonline, but i dont know how to save, or you cant save
To save the service manual page(s), press the Ctrl, Shift, and S keys simultaneously. A box will open, asking you where to save it. Save it wherever you choose. This can be done for any online .pdf's.
Larry, your post of the diagram of the power truck for 2023 was very helpful. Olsen’s Trains has a searchable library including that page. Now in need of similar diagram on the 624 switcher. Olsen’s doesn’t have that exploded diagram. Is that online anywhere?
I think the material on the 622 would be helpful.
swede
The parts and wiring diagrams for the #600 locomotive should be helpful. The pages for the #624 will help with identifying parts that are unique for that locomotive. With both sets of pages, you should have everything needed to service your locomotive.
Thanks. I see what you mean—Absolutely! And I see the power trucks in 600 locos are suspended from the frame differently then in the 2023. I had wanted to swap the power trucks between locos because I have a problem in my 624 operation that would be mitigated temporarily if I swapped it into a 2023 I run in a “lash up“ with another 2023; intermittent stalls at low speeds make me think the armature in the 624 May have a bad spot. The lash up would tug it past that spot for uninterrupted operation. After the virus emergency, I will see proper repair.
You can check the armature with an ohmmeter set to the lowest range. Check each of the three segements to each other. You should get readings very close to each other. Now set the ohmmeter to the highest range. Check each segement to the armature shaft. You should get an infinite reading (open circuit). The armature needs to pass both tests.
Stalling may be caused by a number of problems. First, clean the track, the roller pickups and all wheels on the locomotives with Naphtha. Then, using the AC voltmeter scale or a lighted car, check all around the track to insure even voltage. Add extra lockons and feeders if necessary.
After all this is done, you should have no problems running your trains.
63First off, other locos perform fine over the same track. I believe the problems are in the loco: the pickup rollers or armature or brushes or intermittent opening of a wire connection.
Do I need to remove the armature? After removing motor mounting screw from bottom of power truck, the motor wouldn’t come free. So have to remove whole truck I guess. But when I removed screws into the mounting bracket , part 622-63, there was still something resisting the removal.
Dont think ohm meter on my multimeter is working; it should sweepm all the way across the scale if the two probes are put together because in this case, there would be no resistance. A winding giving that same reading would be burned out, having eck offered no resistance.
So so first step is to be able to check resistance. Then check some readings
thanks
I would suggest you invest in an inexpensive digital multimeter. Good armature windings will give very low readings, usually under 5 ohms.
You do not need to remove the armature from the motor to check it.
If the armature checks good, disconnect the 'E' unit wires and wire up the motor according to the center-left diagram here, Wiring Diagram of Locomotives with no Reversing Mechanism. Apply power, and the locomotive should run in one direction. Reverse the leads to the brushes, and the loco should run in the opposite direction.
Where did you get the part #622-63? I do not see it in the service literature for the 624 or 2023.
I'm presuming we are talking about repairing the 624 loco?
If your ohmmeter's needle won't go all the way to zero, and you have used up all the adjustment for the scale that you are using, then you may just need a new battery.
A winding that truly measures zero ohms is not burned out; it is short-circuited.
"eck"?
Bob Nelson
Regarding Larry question about part number 622-63 , it is listed on olsen page covering 622 loco as truck pivot bracket
different question—want to search gears in geared power truck for something causing wheels to lock Up. after I have truck taken off motor and remove frame sides, how do I proceed, or should I leAve to someone who knows what he’s doing? found several good videos, but none disassembled the geared truck.
Since you have taken the motor off the truck, you should be able to roll the truck by hand and watch it to view the cause of it locking up. Make sure there is no debris in the gearing. Inspect the gears to insure there are no missing or worn teeth, and that their central holes are not worn. Inspect the studs the gears spin on to insure they are not worn either.
If the gears are a problem, best leave the repair to somone qualified that has the knowledge and proper tools.
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