Re: D9R and 463 pull scraper
 

Must have done something right, a few spots in that vid I could of swore it was the real thing.

Re: D9R and 463 pull scraper
 

Joe, Your outfit looks so real I had to study it to make sure it was a model. You know it would be kinda interesting to have a thread on the best videos of the various builds to be voted on by the participants of the forum. Maybe each member if interested could enter their best video over a period of time and then have all members if interested vote for the best overall. Could be the best of the year or some other time period. Just an idea. Fred

Re: D9R and 463 pull scraper
 

Joe..

No way you or anybody else is going to top that video..5 stars

Jerry

Re: D9R and 463 pull scraper
 

Wow, if it wasn't for the grass in the background I would have been convinced that it was the real thing. Amazing work and very Inspiring. Keep up the good work, I really enjoy watching your videos and seeing the pictures.

Re: D9R and 463 pull scraper
 

NOW THATS WHAT IM TALKING ABOUT..Good job joe

Re: D9R and 463 pull scraper
 

Joe Joe Joe ! You have set the BAR so high with your skill, I can't even see the BAR...
WOW great video and great build...

greg

Re: D9R and 463 pull scraper
 

You must be happy it looks flawless and operates just like a real one most impressive

Re: D9R and 463 pull scraper
 

Thanks a bunch guys. Greg, the bar was set long before I ever got into this hobby, just trying too keep up.

Fred, I like your idea, we need more inspiration on here and that might just do it. One of you mods bring that up next board meeting, please.

Re: D9R and 463 pull scraper
 

great job!!!!!!!!!!!! looks like it does the job and looks real and good too how big of a cut are you taking at a time in one pass ? looks like you have plenty of power and traction i am curious how much preshure of a pull it is making and how much it weighs loaded just curious definitly another great build keep up the great work

Re: D9R and 463 pull scraper
 

Re: D9R and 463 pull scraper
 

WOW That looks excellent! The lighting really does it justice too. By the way; Are those leaves from some giant prehistoric tree of some sort:D:D:D

Re: D9R and 463 pull scraper
 

Thank you guys.

It will cut about a 1/2'' at a time but that is because the cylinder bottoms out. However after today it may get new cylinders that will dig a little deeper.

Been going to try and build some cylinders for about 2 years now, well today I successfully made one and put it on the scraper. The crowd cylinder that I bought was a 6'' stoke and I needed 7'' so I hooked it up and it works really well. I was wanting the crowd to move faster as well so I put a big ram in it and it doubled the speed of the crowd. I'll get better pics up of it all tore down, it is totally rebuildable through the gland end.

http://i539.photobucket.com/albums/f...9/HPIM1538.jpg

Re: D9R and 463 pull scraper
 

thats cool i was going to do the same thing on the tilt cylinder for the D7 and 82-30

Re: D9R and 463 pull scraper
 

WOW Joe it doesn't look like you are going to need the push bar on the back of the pan the 9 does a good job of filling it on it's own.:cool:

Travis

Re: D9R and 463 pull scraper
 

Well joe-you gonna show us how you made the cylinder or is that "top secret".:D

Re: D9R and 463 pull scraper
 

yea we need a step by step and where to find the parts lol i was going to bore mine out and have them nichol plated and the stem chromed and just use O rings in it

Re: D9R and 463 pull scraper
 

Don't tell anyone Tom.lol

Here is the cylinder all torn down. The bore is 1/2'' and stroke is 7'', with a 5/16'' ram. The material is all from McMaster-carr.
http://i539.photobucket.com/albums/f...9/HPIM1540.jpg
http://i539.photobucket.com/albums/f...9/HPIM1541.jpg
http://i539.photobucket.com/albums/f...9/HPIM1543.jpg
http://i539.photobucket.com/albums/f...9/HPIM1544.jpg
Sorry about the pics being a little fuzzy.

Re: D9R and 463 pull scraper
 

Great looking work

Re: D9R and 463 pull scraper
 

Yes, Very nice machine work Joe. What size threads are on the packing flange?

Re: D9R and 463 pull scraper
 

why can't a guy use regular metal like cold / hot rolled steel for what we are doing? and hone them real fine inside?? would it work? i was thinking i would have the inside and stem nickel plated but it would be nice not to have to do all that when boring and honeing would work i mean how much hydralic preshure do they push ?? in psi i know 10 bar or so but i donno what that actually is lol and i know it has to be smooth right? any detailed help would be great:) that is one nice pan and cylinder you have built very cool

Re: D9R and 463 pull scraper
 

10 bar is 174 psi. The steel will work if seemless and honed. I useed the brass because it machines better and and the price is'nt much different. I haven't even honed this brass yet. Most tubing I've seen don't take much to clean up. I used regular o-rings on mine and is doing fine so far but I'm ready to put it to work.

Steve, I used 1-72 bolts on the gland packing.

Re: D9R and 463 pull scraper
 

Joe-that is some nice and precision work! Will the standard o-rings handle the hyd. fluids?

Re: D9R and 463 pull scraper
 

well i was going to use round stalk lol as like in my pics that i turned out no seem i don't think lol and i think i could use a set of fine brake hones and on the stem what could be used zink plated ? i really don't know i know how it all works just don't have a clue what to use for materials ............sorry about hyjackin your thread

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Standard in size I guess is what I meant to say, they are Buna, made for hydraulic applications.

Henry, you would save a lot of time just getting the tubing insted of boring them. I would use 260/330 brass tubing and just a polished steel precision ground rod. I think I went with the 260 brass on my cylinder (been laying there a couple years, can't remember).

Re: D9R and 463 pull scraper
 

I would use brass or plain steel tubing for the cylinders and just hone out smooth (oil will coat inside and paint outside for rust proofing) For the Rod I would look at precision ground stainless, should be plenty smooth enough (most anyway, some ground stainless rods aren't the best and would need polishing) and the stainless would keep rust away. Much cheaper and easier than zinc and chrome plating for what it is.

Re: D9R and 463 pull scraper
 

Joe's right Clyde , trust me I've been there and lost some hair . I got some seemless ss tube and rod . I was going to tread both ends of the tube and make brass ends but I like joe's glad end set up :)

IHSteve

Re: D9R and 463 pull scraper
 

Another option is to check the local auto wreckers for hatchback cyclinders...Rod diamater is fairly close to scale size and if your careful you may be able to salvage seals ..might be worth a try

Re: D9R and 463 pull scraper
 

Henry don't get the inside of the cylinder to smooth you have to have some roughness so the oil will hold on, a polished surface is not good I am using brake cylinder hones on my cylinders and some I got from a place in Florida that they use on automatic transmissions to clean up bores. Ed

Re: D9R and 463 pull scraper
 

Joe, awesome job, as usual. Do you have a reference for sizing the o-ring grooves? O-rings are easy to find, but I'm not sure how much clearance or squish to allow for proper sealing without excessive sliding resistance. Did you solder the large end on to the barrel or turn it from one piece of thick-wall tube? Thanks!

Ken

Re: D9R and 463 pull scraper
 

Hey Ken, The o-rings are already sized, by that I mean that if you needed an o-ring for a 5/16'' shaft, it is made with the right tolerances that it needs to do the job. When I cut an o-ring grove I use the same tolerances.

The end cap and the large end are soldered, yes.

When do we get to see what you are building, Ken? It's been a long time.

Re: D9R and 463 pull scraper
 

Joe, I think what Ken wants to know is- if you use an O ring for a .5" diameter cylinder, what diameter groove do you put in the piston? Do you just measure the O ring thickness and make the groove that dimension smaller than the cylinder? Or is there some sort of chart or rule of thumb that you go by when making the piston grooves?

Lynn

Re: D9R and 463 pull scraper
 

I don't have a chart, just made the piston groove a thousands bigger than the o-ring. You don't want it to tight and stretched or it will change the OD of the o-ring. Here's a link to what I referenced too. http://www.allorings.com/gland_dynam...iprocating.htm

Re: D9R and 463 pull scraper
 

Machinerys handbook has all that info in, strongly suggest anyone that tinkers with machining get a copy, lots and lots of good info.

O-ring groove sizes are in my 25th edition on page 2400.

Re: D9R and 463 pull scraper
 

Thanks Joe and everyone for the response and advice about the orings. My Komatsu dozer is a very slow build. Been traveling a lot for work - last time I even took my mini-lathe and turned out four bottom rollers during the evenings at the hotel. I finally figured out the drivetrain and got gears, bearings and motors. Have modified cordless drill planetaries for the final drive and sourced pinion and bullgears along with bearings. Got a mini-mill about a month ago and have practiced using it - much more accurate and easy to use than the Dremel-in-a-drill-stand I "machined" the pivot shaft covers with. I will be building the tracks completely, which will take time, but have found only one product that is close to correct pitch (20.4 mm) for my dozer, but would cost about $500 just for the links and pads - too much for my wallet. Have taken pictures - just reluctant to post yet, since it will be a while before it looks like anything. I am always amazed how quickly some of you build things - to me it's astonishing fast! Machining is a skill I'm aquiring slowly - have to double check everything I do, which slows completion times. But I'm getting better at it. Seeing the work that people on this forum do, keeps me motivated.

Sorry for the lengthy posting...

Ken

Re: D9R and 463 pull scraper
 

I think we need more video's of those awsome machines at work lol i can set and watch them all day as i have before :)

Re: D9R and 463 pull scraper
 

I'd like to oblige you, but I burned up my hydraulic motor yesterday doing a little test and tune on the radio, so waiting a motor. The motor kept getting oil in it since I bought it and it would burn it out as soon as I fired it up. I brought a whole new meaning to the phrase (fire it up), yesterday.

Re: D9R and 463 pull scraper
 

AWwWwW that is bad does that mean you have to get a new hydralic pump?

Re: D9R and 463 pull scraper
 

No, pump is fine, just the motor. $27 Thank you Lord.

Re: D9R and 463 pull scraper
 

Joe you do this with your grader?
http://www.youtube.com/watch?v=ot_AOuVYw_w

Re: D9R and 463 pull scraper
 

I'm gonna practice that grader move... Hope the company doesn't mind!