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Discussion Starter · #1 ·
I read the other post. It didn't help me. Since I'm new to the Mogul, I just started ruining my first Mogul, I figured I'd post here.

It runs really ruff. Sometimes it will not start moving. The lights are on, but it is stuck, but not humming. Often I can push the loco or rotate the front or rear driver a little to get it started.

I got the bottom plate off, removed the drivers, electrical clips, brushes and sliders. Using my thumb on either of the idle gears, I could easily rotate the motor through 340 degrees, for about 20 degrees it became hard to move and there was a scraping sound coming from the motor. To me it sounded like the armature rubbing on the magnet, or perhaps a bad motor brush.

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So far this is the only test I have done to isolate the problem:
I put the axles back in, but left off the side-rods and cylinder quids. This way I could run it on rollers with just the front and rear axles rotating and eliminate any binds or quartering issues. There is a definite CLUNK CLUNK CLUNK coming from the innards of the loco. Sometimes when I stop, the loco will not start, so the original problems is still in there. I cleaned away the grease and very closely examined ALL the teeth on both the idle gears and the axle. There is no cupping or even any sign of wear. The loco only has about an hour of run time.
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What do I do next?
( I have a spare set of gears, and the local dealer stocks two different motors, both with two worms spaced about the same distance but the motors themselves are different lengths I have no idea which replacement motor will fit the Mogul.)

HELP!!!
 

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Your 20 degree scrapping tells me the motor is most likely bad. The motor should turn freely through 360 degrees.

Do you have part numbers on the replacement motors? The Mogul instructions state that the 62204 motor with the long shaft is the replacement.

Did you check the 'feel' of the new motors for how well the shaft turns?

PS, I did find a motor with a bad winding iin 1 LGB engine I repaired for a friend. The winding was open and i resoldered it on the armature.
Another motor on my Stainz from the 30th birthday set had a defective motor brush. Carbon rod had the copper plate loosen and jam the motor brush making the spring in effective. Solution was to remove thecopper plate and motor works great.

So, motors do go bad and sometimes can be repaired.
 

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i presume this was a used mogul?

i have had no issues with my 4-some of which are 20+

basic wear out items on these are idlers, shoes, brushes, connecting wires (pull out by plug and not by wires)

and motors-but i know you know this


if it needs an overhaul with other worn items i strongly suggest you send it to lgboa and expect it returned late summer-avoid the xams rush!!!

but they do great work

a suggestion- depending on the year -a little added weight in the tender can aid somewhat in backing longer trains

best of luck
 

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I guess this is one of those dumb questions, but when you had the locomotive broken down and manually turned the gears to rotate the motor and encountered the bind. Why at that point didn't you just continue and remove the motor?

I mean that way there wouldn't be any question as to whether it was the motor causing the bind.

Then if it turned out to be the motor, is the motor made so as to preclude disassembly? Just to see exactly what has gone wrong with it, and determine if there was any chance to effect a repair.
 

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Discussion Starter · #5 ·
Steve, it is a new loco, less than an hour runtime, Always did run poorly.
Steve, At the time of the post, I had only removed the bottom plate and axles. The loco was not broken down, and since this is my first time with a Mogul, I thought I'd ask questions before I got in too deep.

OK, Update.

I figured out how to get to the motor, I dropped the whole block out of the boiler and opened the top.
Still could not see any damage to the gears.
I ran the thing on rollers with only the front axle and idle gear, then again with only the rear idle gear and axle. The roughness showed up about every 300 degrees, ONLY ON THE REAR AXLE

Then i swapped the idle gear to the front axle and the problem moved with the idle gear.

That indicated a problem with the idle gear that engages the worm. I cleaned it with LGB smoke oil and found the space between two teeth was filled in with plastic. After hours of hunting I found my spare gears in the garage. replaced the gear and retested. THAT FIXED IT.

It took me several hours to put it back together, as I made several missteps. bur the Mogul is now back on the ALLY and running much better than it ever had.

Thanks guys.
 

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Thanks for taking the time to respond to the dumb question. /DesktopModules/NTForums/themes/mls/emoticons/hehe.gif:D

Glad that you found the problem and it turned out to be something that you had replacement parts for already on hand.
 

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Bob,
I don't have a Mogul, but I was curious to see how it worked out. Glad it was fixable with a gear you had on hand.
Now, will someone please tell my wife THAT is why I have to keep all those boxes of random parts, or as she calls them, "JUNK". :)
Paul
 

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Paul, we all know one man's 'JUNK' is another man's treasure. Convincing the wives can be difficult.

I keep spare parts on hand and they have been handy especially when looking at a used engine and knowing I can repair it with parts on hand.
 
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