PC1800 Front Shovel (1/12)
Started building the PC1800 with a plywood profile the same way that I started the D11 and 777 build. I will be using the original tracks I had on the dozer but will need to add 10 more links and pads, keep in mind I'm not building a true scale model of the shovel but will try to keep it much the same as full scale.
[IMG]http://i1291.photobucket.com/albums/...psbet0ntz5.jpg[/IMG] I have made some progress already with this build and will upload more pics and info in time. |
Re: PC1800 Front Shovel (1/12)
Swing bearing build using 200 - 1/4" steel balls and when completed is about 9.375 in dia.
[IMG]http://i1291.photobucket.com/albums/...psykarofxi.jpg[/IMG] [IMG]http://i1291.photobucket.com/albums/...ps6ipf868n.jpg[/IMG] [IMG]http://i1291.photobucket.com/albums/...ps3dlhiy4h.jpg[/IMG] [IMG]http://i1291.photobucket.com/albums/...psqemudirz.jpg[/IMG] [IMG]http://i1291.photobucket.com/albums/...psbfor3spe.jpg[/IMG] I will be using a sprocket and chain for the swing , this will allow me to put the swing drive motor in under the cab or in a spot that is not needed for something else. [IMG]http://i1291.photobucket.com/albums/...psvnpsrisz.jpg[/IMG] [IMG]http://i1291.photobucket.com/albums/...psfhyokyvi.jpg[/IMG] [IMG]http://i1291.photobucket.com/albums/...psdfpdmgfg.jpg[/IMG] Still need to install the top and bottom seals on the bearing as well as the spacer to get the proper height. Hope this all works...LOL |
Re: PC1800 Front Shovel (1/12)
I will be trying these air cylinders on the shovel not sure how well they are made but I'm going to find out. The main boom cylinders are 1.25" ID and the rest are 1.0625" ID. Hopefully the 5/32" tubing will have enough flow.... I'm going to find that out as well. :D
[IMG]http://i1291.photobucket.com/albums/...psxfsvipwx.jpg[/IMG] I also plan on using a full scale valve body and pump , I will need to change the operating pressure in the valve down to 200-250 psi and the pump will need to turn at about 1500 RPM to supply enough volume for the cylinders, not sure if I can get this all to work as I would like but it's worth a try...the other challenge will be getting it all to fit in the model....time will tell. [IMG]http://i1291.photobucket.com/albums/...psbd7no19a.jpg[/IMG] |
Re: PC1800 Front Shovel (1/12)
Princess Auto strikes again!lol I'm liking what you're up too! I think one of the other guys on here used some valves like that in a couple of excavators and they worked alright. What is the plan to spin that pump with? 3408?lol
http://rctruckandconstruction.com/sh...ighlight=pc650 |
Re: PC1800 Front Shovel (1/12)
Nice work on the slew ring :)
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Re: PC1800 Front Shovel (1/12)
Since I'm a Komatsu guy, I've been waiting for this build to start. Great work on the swing bearing! Don't know if it will be a problem, but sometimes when a main relief valve is adjusted well-below its normal operating pressure, it is not very consistent or accurate. I'm guessing this system has an original pressure of 2500-3000 PSI, dropping to 250 PSI might be a problem. Hope it is not for you. Should you need additional technical information about the full-size PC1800, let me know. Be glad to assist.
Ken |
Re: PC1800 Front Shovel (1/12)
I am also glad to see this build start. I am not a hydraulics guy but I will follow this all the way. Nice work so far. Post lots of pictures.
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Do you work on this machines or operate them?? |
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I will try post lots of pics.....did I post enough pics of the 777 build?? I always think people don't want to see every little step in the build....if there is something you want to see more pics of just let me know, be glad to post them for you, I usually take to many pics anyway.... |
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Ken |
Re: PC1800 Front Shovel (1/12)
I agree with RCP-I want to see everything!! A scratch build and a front shovel. It just doesn't get any better than that for me. I prefer the older cable shovels but I guess they are on the way out. Hydraulic machines take a lot more maintenance and do not last half as long but I understand that is what the companies want today.
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Re: PC1800 Front Shovel (1/12)
All what those guys said...^^^^^^^^^. Cracking work on the swing bearing too...:cool::cool::cool:
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Wow, great work on the swing bearing!! I've tossed around the idea of making bearings. Can never find the right size and if I do it's $$$!!! Yup, keep the pictures coming, I usually post pics because I need a break or because something just isn't working out and it's just enough to walk away and regroup:). Speaking of that, how is that motor gearbox holding up on the haul truck? This front shovel is going to be a big boy!! Any guess as to how much it may weigh when done??
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The banebots motor gear box has held in there so far, have stretched the#25 chain and have needed to tighten it a few times but the motor hasn't given any troubles yet...knock on wood...you know how that works...watch the next time I use it something will pile up :lol: I want to tear it apart and look at the gears and see if there is any possible failure about to happen, or at the very least clean it and apply new grease....pulling the motor out of that truck is not much fun so I think that's why I haven't yet;) Not sure how heavy it will be, if I had to guess I would say it will be in the 140-160lbs range but I could be completely out to lunch on that guess, may even end up being heavier...lol...knowing the size of it and the way I build stuff it will most likely end up being 200lbs HEEHEE |
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Is it OK to post reference pics from the online Komatsu brochure of the shovel...I would like to post one of the pics with all the size references on it ? Or if anyone else knows the answer let me know....that would be great ! |
Re: PC1800 Front Shovel (1/12)
Not an expert, but if wanting to post something that is from Komatsu's public website, I'd say no problem since it is not being using in a derogatory or for-profit way. Might list the link you got it from.
Just my opinion. Ken |
Re: PC1800 Front Shovel (1/12)
Here are the dimensions of the full scale PC1800 that I will be using to help build this model.
[IMG]http://i1291.photobucket.com/albums/...psjfzipqmr.jpg[/IMG] This info was found here http://www.komatsu.com.au/AboutKomat...6/PC1800-6.pdf Some specs for the full scale machine Twin 454HP engines Swing speed 4.5 RPM Max speed 1.7 MPH 2.7KM/H Number of track pads/shoes 49/side Weight with 40" triple grouser 405,910 LBS (184,120kg) (1/12 scale is about 235lbs....yikes) Bucket breakout force 81 tons Bucket size 14.4 yds , 127" wide (1/12 scale is 10.6" wide) Hope this will be of interest....Thanks for looking KP |
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