|
|
 Posted - December 15 2011 : 9:10:00 PM
|
I have an HO Baldwin S-12 that runs, but only when I tip down the right hand edge of the chassis, (when you are looking at it from the front of the Loco)
I have the cab off & the chassis sits on the rails & won't move unless I 'lean' on that RHS, then it goes a bit untouched, then stops & I have to push down on the side again. Leaning on LHS doesn't work.
The Connector Clip appears to be making ok contact with the contact strip that comes up from the power trucks.
So, any ideas?? Anyone else had this one.
Have I got a short in the power Trucks?
BTW, where is the power actually being picked up off the rails with these??
TE
|
Country:  USA ~
Posts: 243 ~
Member Since: September 08 2008 ~
Last Visit: January 04 2012
|
Alert Moderator
|
|
|
|
Posted - December 15 2011 : 9:56:55 PM
|
One of only two things likely,
A short as you said...
more remotely, somehow a gear is not making proper contact with another. not enough "mesh" to drive things.
Have you put power to the motor on it's own? Do that and see if things spin. In troubleshooting you reduce to the basic form and work up to "trace" the fault...
Hope that helps,
Likely Jerry (AMC) or Nelson Nickleplate) will chime in here with more specificity...
-Gareth
"A is A"
-Aristotle
Law of Identification
|
Country:  Canada ~
Posts: 4200 ~
Member Since: January 08 2006 ~
Last Visit: November 09 2021
|
Alert Moderator
|
|
|
|
Posted - December 15 2011 : 10:09:09 PM
|
Do you have a Test stand? If not, apply power to the motor contacts.
|
|
Country: USA ~
Posts: 1102 ~
Member Since: July 28 2011 ~
Last Visit: July 01 2015
|
Alert Moderator
|
|
|
|
Posted - December 15 2011 : 10:19:13 PM
|
Ian:
Did you even bother to read what I wrote him?
quote:| Have you put power to the motor on it's own? Do that and see if things spin. In troubleshooting you reduce to the basic form and work up to "trace" the fault... |
If you have something to ADD, great! But repeating whats been said is uneccesary, don't you agree?
-Gareth
"A is A"
-Aristotle
Law of Identification
|
|
Country: Canada ~
Posts: 4200 ~
Member Since: January 08 2006 ~
Last Visit: November 09 2021
|
Alert Moderator
|
|
|
|
Posted - December 15 2011 : 10:41:33 PM
|
Check and see if the wheels are fully contacting the pick-up strips and no wires are crossed with each other and there should be bare wires inside.Clean everything contact wise with rubbing alcohol too.
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
|
|
Country: USA ~
Posts: 3147 ~
Member Since: May 07 2007 ~
Last Visit: December 13 2025
|
Alert Moderator
|
|
|
|
Posted - December 15 2011 : 10:58:33 PM
|
quote:Do you have a Test stand? If not, apply power to the motor contacts.
Originally posted by CNVIATyco - December 15 2011 : 10:09:09 PM
|
Well I decided I would have to pull it apart.
Got motor out where I could get at top & bottom contacts ok & it spun up fine when power applied..
That left the trucks.
Got them out & I think I have found it.
If you take a truck & look at the end with the inverted 'L' metal pickup strip facing you, there is this flat piece of thinner metal strip underneath that, sitting horizontally flat, then bent at right angles, running down between the axles.
On 1 truck all was tight, but on the other the thinner horizontal strip was loose & pulled out. I found it has a hole drilled or punched in the tag that is down between the axles.
I am guessing it slides over a peg or something, so I will need to dismantle the power truck & put it back in position.
TE
|
|
Country: USA ~
Posts: 243 ~
Member Since: September 08 2008 ~
Last Visit: January 04 2012
|
Alert Moderator
|
|
|
|
Posted - December 16 2011 : 12:31:01 AM
|
Tanked, just to clarify this is an Athearn S12, and it sounds like this is the older model with the diecast sideframes. The same post that holds the sideframe on holds the steel contacts in place as well. The one you've found that's loose is the one that makes contact with the frame. The white metal post (or peg as you called it) goes through the steel contact and is peened over like a rivet. It's likely that the peening was insufficient to hold it in place. You may be able to spread it using a center punch, but you have to support the sideframe in the center with something soft.
The Tyco Depot
|
|
Country: USA ~
Posts: 3927 ~
Member Since: June 20 2007 ~
Last Visit: November 19 2015
|
Alert Moderator
|
|
|
|
Posted - December 16 2011 : 09:29:12 AM
|
quote:Tanked, just to clarify this is an Athearn S12, and it sounds like this is the older model with the diecast sideframes. The same post that holds the sideframe on holds the steel contacts in place as well. The one you've found that's loose is the one that makes contact with the frame. The white metal post (or peg as you called it) goes through the steel contact and is peened over like a rivet. It's likely that the peening was insufficient to hold it in place. You may be able to spread it using a center punch, but you have to support the sideframe in the center with something soft.
Originally posted by NickelPlate759Â -Â December 16 2011Â :Â 12:31:01 AM
|
Obviously you have been there before Nelson
Correct on all counts.
Took the small screwdriver to the truck this morning & found exactly what you have said.
Now, the interesting thing is that on both power trucks, the # 40056 Gear Box Top Clip was missing.
The unit was purchased 2nd hand a while ago as 'New/Unrun', showed no sign of prior entry, no scuff marks or screwdriver gouges.
I can only assume that it was a bad day on the assembly line 30 or so years ago.
Am I correct in saying that the current comes through the metal side frame to this displaced contact, which in turn passes on the current to the 'inverted L' contact that is rubbed by the Connector Clip?
I noticed that the contact between the 'displaced tag' & 'inverted L' is just a touch fit, so presumably the Top Gear Box clip is meant to ensure these 2 pieces of metal don't stop touching. Will need to get into the spares bin to see if I have some Top Clips
Thanks
TE
|
|
Country: USA ~
Posts: 243 ~
Member Since: September 08 2008 ~
Last Visit: January 04 2012
|
Alert Moderator
|
|
|
|
Posted - December 16 2011 : 3:31:26 PM
|
No, what you're describing would be a direct short between the rails. The two steel contacts should never touch. The upper ones carry current to the top of the motor through the contact strip, and the frame rests on the lower ones and carries current from the left rail to the bottom of the motor.
I'm not sure which one is loose... I thought it was one of the short contacts. As for the missing clips, they may have stopped using them at some point, since the truck is already held together by the bottom cover and the worm housing.
The Tyco Depot
|
|
Country: USA ~
Posts: 3927 ~
Member Since: June 20 2007 ~
Last Visit: November 19 2015
|
Alert Moderator
|
|
|
|
Posted - December 16 2011 : 9:46:56 PM
|
quote:No, what you're describing would be a direct short between the rails. The two steel contacts should never touch. The upper ones carry current to the top of the motor through the contact strip, and the frame rests on the lower ones and carries current from the left rail to the bottom of the motor.
I'm not sure which one is loose... I thought it was one of the short contacts. As for the missing clips, they may have stopped using them at some point, since the truck is already held together by the bottom cover and the worm housing.
Originally posted by NickelPlate759Â -Â December 16 2011Â :Â 3:31:26 PM
|
The one that was loose was the the one on the rear power truck that goes down to the metal truck frame, as you had previously identified. I looked at 'peening it', but decided to try judicious application of a small amount of JB Weld.
That appears to have done the trick as I have just re-assembled it & tested it.
It ran very smoothly & the absence of the 'Top' clips doesn't seem to affect the gearbox.
Thanks
TE
|
|
Country: USA ~
Posts: 243 ~
Member Since: September 08 2008 ~
Last Visit: January 04 2012
|
Alert Moderator
|
|
|
|
Posted - December 16 2011 : 11:42:25 PM
|
I'm glad it runs, but since you used epoxy you should test to see if it's conducting by touching test leads to the rear sideframes. You could end up with 6 wheel pickup.
The Tyco Depot
|
|
Country: USA ~
Posts: 3927 ~
Member Since: June 20 2007 ~
Last Visit: November 19 2015
|
Alert Moderator
|
|
Home
Forums
Events Calendar
Forum Admins & Mods
Register
1 guest.)
