Re: PC1800 Front Shovel (1/12)
 

Looks nice! Great work!

Kerst

Re: PC1800 Front Shovel (1/12)
 

With all the fine machinist work you've done to date KP, I think you should now build your own cylinders to compliment the model. :D :p

Re: PC1800 Front Shovel (1/12)
 

That boom looked so big , until I saw the pic of it attached. Really puts perspective on how monstrous this model is!!! Not saying it's is small but it looks small once it's mounted, in comparison to the base!! I think I see one of those hydraulic lifts in your future!! To work on this monster!! You are really doing a great job on the parts, nice clean lines, hidden welds, that lip on the box of the boom is really going to pay off in looks. Appreciate all the pics also, very much enjoy the building process and sharing of how you are doing the cuts!! Even if you would have cut them with a program it still is a lot of hard work!! Definately going to pay off in the end and show it off too!! You got me thinking about something to load the haul truck with, I was think big loader but having something heavy with the payout force like this may be better suited for me. ,,,, have truck need loader,, lol!!!

Re: PC1800 Front Shovel (1/12)
 

This thing is a beast can't wait to see more progress. Awsome build so far

Re: PC1800 Front Shovel (1/12)
 

Thanks!!

Re: PC1800 Front Shovel (1/12)
 

Thanks Joe...yes I have considered making cylinders....but at this point I think I will use the cheap air cylinders and just focus on getting this build functional. Once this model is actually finished I really can't see these air cylinders lasting very long, so I can see building some cylinders for this model happening in the future. But for now I really have to spend my time on getting it finished and hopefully functional!?😃

Re: PC1800 Front Shovel (1/12)
 

Lol....yup it looks big by itself but not so much when it's on the machine...there is one thing about face shovels that always seems strange... the fact that even the full scale machines don't seem to be to scale...lol...the boom and stick seem to small for the size of the buckets!!
Glad you like all the pics I posted...sometimes I wonder if anyone is really interested in seeing all the boring details of how this is being made, but hopefully it will help give ideas to others !!

Re: PC1800 Front Shovel (1/12)
 

Thanks!! Hope you are patient... because progress is slow!!! Lol!!!

Re: PC1800 Front Shovel (1/12)
 

There are no boring details in build threads! :)

Always interesting to see how people work things out. Some (if not most) of the build threads on here are way above my skill level, which makes it even more interesting. Already had some nice "so that's how they do that" moments while spending time on this forum.

So thank you very much for posting the pictures/explanation. :)

Stephan

Re: PC1800 Front Shovel (1/12)
 

I seem to be having trouble getting on here......and staying logged in.....very strange?? I keep getting logged off without actually logging out, and then can't seem to get back on. Same result on my phone and computer....let's see if this works for more than one try.....

Ok.....so I have started working on this build again......put grease in the gearboxes, threaded and welded the sprocket hubs and machined flats on the drive axles etc

http://i1291.photobucket.com/albums/...psbdxqohc1.jpg

http://i1291.photobucket.com/albums/...pslsuc6xpt.jpg

http://i1291.photobucket.com/albums/...psdsuaxhju.jpg

Re: PC1800 Front Shovel (1/12)
 

Mounted the motors/gear boxes in the center frame I was hoping to add a short video of it working but can't load videos on photo bucket anymore....but at least the photos/links are now working again!!

http://i1291.photobucket.com/albums/...ps5e42ylco.jpg

http://i1291.photobucket.com/albums/...psagcssq8u.jpg

Hope this works.....Lol!!!

Re: PC1800 Front Shovel (1/12)
 

The parts are looking very nice!

Re: PC1800 Front Shovel (1/12)
 

https://farm5.staticflickr.com/4902/...e78cba74_z.jpgTRUCKLOAD o thumbs by Anthony Kalnoski, on Flickr

Re: PC1800 Front Shovel (1/12)
 

Thanks guys!!!

This is interesting.....a desktop water jet cutter. It cuts a bit slow.....but still interesting!!

https://www.wazer.com

Re: PC1800 Front Shovel (1/12)
 

It seems that in any build there are things that get left out and skipped because you want to fast forward to the next step....LOL.....only to have to come back and finish it later, one step forward two steps back!! Here are a few things that needed to get finished

Drilled and tapped holes to mount the sliders to the side frames.
( Want to make the sliders from black plastic....someday...later...maybe LOL )

https://i1291.photobucket.com/albums...ps8zubeizn.jpg


https://i1291.photobucket.com/albums...ps9zkjp8tz.jpg


https://i1291.photobucket.com/albums...pswrytqhjn.jpg


Also needed to finish machining all the top roller brackets, then drill and tap the mount holes in the side frames. Still need to make the proper shafts for the rollers


https://i1291.photobucket.com/albums...pstwujbkmx.jpg


https://i1291.photobucket.com/albums...psrh9hsgvg.jpg


https://i1291.photobucket.com/albums...pswuie2xh8.jpg


Hope to get this moving around on its own soon !!

Re: PC1800 Front Shovel (1/12)
 

Keep the photos coming!! Amazing work! Thank you for sharing. Cant wait to see this all painted up and running. Hopefully one day along side with my PC700.

Re: PC1800 Front Shovel (1/12)
 

Finished making the top roller shaft parts......

http://i1291.photobucket.com/albums/...psgiivglss.jpg

http://i1291.photobucket.com/albums/...pshropdd0y.jpg

http://i1291.photobucket.com/albums/...psgkimogfa.jpg

http://i1291.photobucket.com/albums/...psxgzf5bvd.jpg


http://i1291.photobucket.com/albums/...pswrae2psl.jpg

Re: PC1800 Front Shovel (1/12)
 

Looking good! I wish I had the skill, & machines to do projects like this. I've got so many ideas I'd love to try, but no way to attempt them.

Re: PC1800 Front Shovel (1/12)
 

Great to see you working on this again KP :cool:

...after the photobucket fiasco summer of '17, I thought maybe I'd never see this finished. You're making some great headway.

We've been having some issues with the forum since last spring with slow page loading & some members having trouble with log-in. Some of the members have figured it out, it's the url for the forum, you must add an s to the https://ect ...we can't seem to change that within our own settings to do that automatically.

Re: PC1800 Front Shovel (1/12)
 

Covers for the drive chains....

https://i1291.photobucket.com/albums...psjylvtqws.jpg

https://i1291.photobucket.com/albums...ps7tu04pvl.jpg

https://i1291.photobucket.com/albums...psrcdivfwv.jpg

https://i1291.photobucket.com/albums...psjwsrfwzy.jpg

https://i1291.photobucket.com/albums...psyhpewomo.jpg

Re: PC1800 Front Shovel (1/12)
 

Awesome!! Definitely going to be going back to many of the obstacles you have overcome and study. Appreciate you taking the time to post progress and details of your builds. Only bad thing is now I have more of an idea how to do similar and less of a reason not to!! Love the bigger machines. !!

Re: PC1800 Front Shovel (1/12)
 

Them grousers are mean looking. I think they'll handle some seriously hard working conditions

Re: PC1800 Front Shovel (1/12)
 

Thanks Cooper!! Scratch built models sure do have obstacles but the challenge and the reward of figuring it all out is well worth it!!
(You know all about it I'm sure!!)

Re: PC1800 Front Shovel (1/12)
 

Thanks Skeeter!! Yup the track pads/grousers are a bit aggressive for a shovel....LOL....these are the original tracks that were on the D11 dozer, only needed to add a few more links and pads to the original length......it was an easy way of repurposing old parts. :D

Re: PC1800 Front Shovel (1/12)
 

One step forward two steps back......LOL......more obstacles!!!
Decided on improving the seal design on the swing bearing, the original neoprene
"lip seals" did not like the grease and started to distort/swell making it difficult to turn the bearing.....:(

https://i1291.photobucket.com/albums...psca2yps62.jpg

https://i1291.photobucket.com/albums...psz5y9jh2i.jpg

https://i1291.photobucket.com/albums...ps00smkoyl.jpg

https://i1291.photobucket.com/albums...psuqulzl84.jpg

https://i1291.photobucket.com/albums...psklyfdb32.jpg

Re: PC1800 Front Shovel (1/12)
 

The new plan was to incorporate some small 1/8" quad rings to act as seals but decided to go with o-rings instead. (less contact area making it easier to turn)

The "inner race ring" will be installed upside down and an o-ring added to seal against the inside face of the shoulder that supports the 100 - 1/4" balls on the stationary outer race. (Sorry the photo shows the quad ring)

https://i1291.photobucket.com/albums...pslrcbdvng.jpg



A new taller top spacer ring was made with an o-ring installed that will seal up against the ID of the sprocket.

https://i1291.photobucket.com/albums...ps3kqpwhhd.jpg

The new top spacer ring also needed to be a bit bigger in diameter to match up with the original ID of the sprocket.....Yikes....just enough clearance for the balls once the angle was cut on the spacer.......fun fun......more obstacles!!;)

https://i1291.photobucket.com/albums...psm9kia8v0.jpg

https://i1291.photobucket.com/albums...psv6he2zic.jpg

Re: PC1800 Front Shovel (1/12)
 

This is the order of how all this mess fits together....LOL...still need to drill the holes in the new top spacer!!

https://i1291.photobucket.com/albums...psruoinx2z.jpg

https://i1291.photobucket.com/albums...psbsleit4b.jpg

https://i1291.photobucket.com/albums...psljt453gp.jpg

https://i1291.photobucket.com/albums...psknsymntp.jpg

https://i1291.photobucket.com/albums...psy1x4loep.jpg


Hopefully this will help someone else get ideas on building a swing bearing from scratch!! One thing to remember is that the rolling elements (balls) are only running on a flat surface and not on a radius. Because this bearing only has point contact on the balls it will most likely wear a bit faster.

Thanks for looking!!
KP

Re: PC1800 Front Shovel (1/12)
 

Beautiful work!

Kerst

Re: PC1800 Front Shovel (1/12)
 

Thanks Kerst!!

Did some work on the electrical slip rings for the track drive motors.......it even works!!! LOL:D

https://i1291.photobucket.com/albums...psxeo5rtoy.jpg

https://i1291.photobucket.com/albums...psa7xwjpps.jpg

https://i1291.photobucket.com/albums...ps6ek3m7bb.jpg

https://i1291.photobucket.com/albums...psx6meirfp.jpg

https://i1291.photobucket.com/albums...pstq5aevxk.jpg

https://i1291.photobucket.com/albums...ps3dngyoux.jpg

https://i1291.photobucket.com/albums...psuggs18y6.jpg

Re: PC1800 Front Shovel (1/12)
 

Nice! I like the slip ring.

kerst

Re: PC1800 Front Shovel (1/12)
 

I don't know if the issues with this site have been fixed or if I just got lucky tonight but I was able to log-in and post for the first time in many months. I really like the slip ring you have built. It looks similar to some I have seen on full size draglines. This should work great and last forever. Your shovel is looking fantastic and should be a "digging machine". Keep posting!!

Re: PC1800 Front Shovel (1/12)
 

Progress on the machine is looking great!

I'm really digging that homebrew slipring, is the brush side built off a terminal strip of some kind?

Re: PC1800 Front Shovel (1/12)
 

GEZUZ WHAT A BEAST!!! :eek: :cool: the AWESOMENESS of that last picture :cool:

What's it weigh (approx) as it sits now?

What's the length - width of the tack stance?

Re: PC1800 Front Shovel (1/12)
 

Thanks guys!! Glad you like the slip ring.

Frizzen, All the parts are made from scratch, the brush fingers are .062 thick brass cut and bend to shape.

Joe, The weight of it in that photo would be 125lbs , outside width of tracks is 18.5" , OAL of tracks is 24.25" , distance from floor to ground is 7.25", the house floor is 16.5" x 26.375", CTC on boom pins is 19.5".

Re: PC1800 Front Shovel (1/12)
 

Finished making the boom pins and soldered the keepers in place. Mounted the hydraulic tank, pressure gauge and hoses.....slowly getting this done!!

https://i1291.photobucket.com/albums...psidssvfcv.jpg

https://i1291.photobucket.com/albums...psyhktiely.jpg

https://i1291.photobucket.com/albums...pszngzlien.jpg


https://i1291.photobucket.com/albums...psr0ikg4xg.jpg

Re: PC1800 Front Shovel (1/12)
 

Definitely a beast!! Of the two parts I'm dreading, the endless rotation ring and the slew ring, I don't see any better design on the endless rotator!! And before seeing this post I had a similar idea of loose fitting o rings for grease seals in the slip ring. Trying to source (fairly inexpensive) internal/external spur gears of similar size for the slew ring has not been kind. I've recently decided to get started on a similar machine. I like how you are building this. I know it is a premature question but are you going to have a self tensioning devise on the chain for the slew ring or just have a static adjustable motor mount? One thing I hate is the excessive slop in my small excavator slew assembly. And on such a large machine made to be working on level surface a little slop isn't an issue. Was just wondering.

Looks great by the way!!!! Always impressive!!

Thanks!!

Have you considered creating a (2D) DXF file drawing of the ring gear you need and then price out getting it cut at a laser or waterjet shop??

I still have not decided on what type of tensioner will be on the chain for the swing, most likely will be fixed with no spring. The preload/friction of the o-rings in the swing bearing create just enough drag to stop it from moving to easily and acts a bit like a brake which should help smooth out any backlash in the swing drive set up, hopefully!! LOL!!

Re: PC1800 Front Shovel (1/12)
 

Got some work done on the stick, still not finished......


https://oi1291.photobucket.com/album...psocshi5qp.jpg

https://oi1291.photobucket.com/album...pscwgisgmm.jpg

https://oi1291.photobucket.com/album...ps422zq76z.jpg

https://oi1291.photobucket.com/album...ps9dqtv8tn.jpg

https://oi1291.photobucket.com/album...psksjqe8z3.jpg

https://oi1291.photobucket.com/album...pszbgphpur.jpg

https://oi1291.photobucket.com/album...ps6eia15hq.jpg

Re: PC1800 Front Shovel (1/12)
 

Not sure why the last pics are displaying so large, they are all posted the same way??:confused:

Re: PC1800 Front Shovel (1/12)
 

Nice work :)
I'm also wondering why pictures are displaying so large, I was about to update my grader build, but I on the preview I noticed the same thing and I did not submit it yet.