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 Posted - April 11 2014 : 11:05:18 PM
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I've asked this before, but I need some simple steps into putting the front end of my 4-6-2 onto my 2-8-2, including truck and cow-catcher assembly.
My 2-8-2 had frontal damage, plastic cracked... metal assemblies are still solid.
Any help appreciated!
John
I don't have a one track mind. It depends on the turn-out.
"I love your catenary!"
Is that a power-trip or just another pick-up line?
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 Posted - April 12 2014 : 12:35:01 AM
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quote:I've asked this before, but I need some simple steps into putting the front end of my 4-6-2 onto my 2-8-2, including truck and cow-catcher assembly.
My 2-8-2 had frontal damage, plastic cracked... metal assemblies are still solid.
Any help appreciated!
John
Originally posted by zebrails - April 11 2014 : 11:05:18 PM
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First, before you can put the 4-wheel pilot truck on the 2-8-2, you need to move the cylinder saddle forward to make room for the rear pilot truck wheels. The front drive wheels are now immediately behind the cylinders. By contrast, note the space provided on the 4-6-2. This will involve cutting the frame and spicing in more material. It may be possible to use the front end of the 4-6-2's frame for this.
Next, you'll have to make a new bracket to support the back of the crosshead guides. They'll be farther forward when the cylinder saddle is moved.
Now, you'll have to make longer main rods to connect the crossheads to the crank on drive axle 3. The much smaller connecting rod from the timing eccentric (that crank-shaped thing on the main crank pin) to the radius (the thing that hangs from the bracket built onto the crosshead guides) will need to be longer, too. This'll be hard to make because it's small and delicate.
Find a source of Mantua valve gear rivets and rivet your new main rods to the crossheads and rivet your new valve gear connecting rods to the timing eccentric and the radius.
Unscrew the broken pilot from the 2-8-2 and the good one from the 4-6-2 and swap them.
Remove the pilot truck from the 2-8-2. Remove the screw that goes through the frame into the cylinder saddle, as well. Remove the corresponding screw from the 4-6-2 along with the pilot truck, spring and bushing that go with it. Lengthen the frame on the 2-8-2 Put the 4-6-2's screw, bushing, spring and truck on the 2-8-2 in the cylinder saddle's new, farther forward position.
Put the reworked crossheads, guides, main rods and valve gear on.
At this point, the frame should be done, but now, the cylinder saddle (which on a real engine contains the exhaust nozzle) no longer lines up with the smoke stack. You'll need to splice more length into the boiler to compensate. There are several approaches to this and none are all that simple. Most anywhere you cut it, you will be moving cast on details to where they do not belong.
This is about as simple as it gets, and at that, it's not simple at all.
Carpe Manana!
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Posted - April 12 2014 : 01:40:28 AM
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quote: quote:...My 2-8-2 had frontal damage, plastic cracked... metal assemblies are still solid.
Any help appreciated!
John
Originally posted by zebrails - April 11 2014 : 11:05:18 PM
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...Unscrew the broken pilot from the 2-8-2 and the good one from the 4-6-2 and swap them.
...This is about as simple as it gets, and at that, it's not simple at all.
Originally posted by scsshaggy - April 12 2014 : 12:35:01 AM
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Um, I can do that much. Thanks.
John
I don't have a one track mind. It depends on the turn-out.
"I love your catenary!"
Is that a power-trip or just another pick-up line?
|
|
Country: Canada ~
Posts: 1124 ~
Member Since: December 15 2006 ~
Last Visit: January 30 2023
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Alert Moderator
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