Chris's Marion 91 Steam Shovel

[Steamer5]

 

There be a  in the shop tonight!!

Well done Chris!

[sco]

Just brilliant Chris!

Simon.

[kvom]

Engines reverse in quick order!! 

[crueby]

Engines reverse in quick order!! 

The engine is running at constant forward speed throughout this test, I was moving the clutch lever to control the raising and lowering of the bucket. The engine throttle valve has not been made yet so it was just turned on to around 15 psi at the compressor.


I did test it last night with the tracks, could only move 6 inches on the table but it had plenty of power to move, the gear reduction to the track is 20 to 1. Very happy with the runs, now a bunch of little cleanups, paint touchups, and reassembly. Need to make the last gear guards too, then on to the slew engine.


Thanks all!!   

[Firebird]

Ohhhh yeeeeesssss 

Cheers

Rich

[scc]

Wonderful progress Chris   Thanks too for the Lombard info...makes sense doesn't it.      Terry

[Don1966]

Dog, Dog, awwww man that is just to slick and happier than squirrel on a bag of nuts. That is one bad ass machine Chris and I am waiting to see the slew engine construction work.......did I say ........I ..........like.........


 
Don

[zeeprogrammer]

Too cool for words. So...

 

[crueby]

Thanks very much everyone! Its great to see the engine, gearing, clutch, chains, everything all moving as they should after so much time getting to this point. The engine has plenty of power even at 15 psi. Going to be grinning for a while with this one.


 

[steam guy willy]

Chris , that's lovely  really cool  11/10.... was wondering about safety devices if you are a bit slow on the controls ?? are there slipping clutches or disengagement pauls or something ?? I may have missed something over the last 200 posts ?!!! Looking forward to the completion >>>

Willy

[crueby]

Chris , that's lovely  really cool  11/10.... was wondering about safety devices if you are a bit slow on the controls ?? are there slipping clutches or disengagement pauls or something ?? I may have missed something over the last 200 posts ?!!! Looking forward to the completion >>>

Willy

Safety devices in early 1900s US?   NOT!


Well, the dipper boom has a stop ramp at the end so it can't fall out, and it runs out of rack at the middle so you can't go too far in. Marion states in thier catalog that they sized thier engines to stall before breaking anything else or lifting too heavy a load. I doubt a person in the way would stop anything though! The real one shows plenty of gouges on the front corners of the frame were they clipped it with the bucket.


For the model, it is a concern, not sure where the failure points would be, have to be careful. The shop elves have to take a breathalyzer test before operating it!

[crueby]

This morning I got a bunch of the parts re-assembled (still need to put the slew gear and gear guards back on), and did some more timing tweaking on the hoist engine. I put in a couple of shutoff valves, one on each input hose, so I could isolate the cylinders, and also disconnected the con-rods from the crank. That let me put on low pressure, and hand-turn the crank to see when the valve tripped over in fine detail. That got everything balanced out, and now it will run decently in both directions. Here is proof (you can see the shutoff valves on the left side of the picture) :
<a href="https://www.youtube.com/watch?v=V8xxtSdIlmY" target="_blank">http://www.youtube.com/watch?v=V8xxtSdIlmY</a>
So, will get the gear/guards back on, and have to make a couple more guards for the hoist gears/crankshaft, then can start in on the hoist throttle and its piping.

[Kim]

And it works!  That's pretty exciting Chris!  Both forward and reverse.  And self starting in both directions.  You must be feeling pretty good about that!
Kim

[Admiral_dk]

Congratulations for another important "milestone" in this great build Chris

Can some of the other "Peanuts" please pass the  and pour a refill 

[crueby]

Thanks guys!
This afternoon I got all the bits and pieces that I had taken off to get at the engine back in place, made the last couple of gear guards, and did a little touch up painting on all the nicks and dings in the floor plates. So, figured it was time for a couple new family shots: