Re: LR634 is HERE!!!!! Tracked loader
 

I made a test piece out of laminated styrene to replace the stock link that curls the bucket. I know it looks horrible, hopefully my final one is out of aluminium and will look a lot better.;) I lengthened it twice because my measurements were way off, eyeballing it didn't work;)

http://i977.photobucket.com/albums/a...k/IMG_5390.jpg

Ok, the stock distance from hole to hole is 62.9mm. The new one is longer and the distance from hole to hole is 66.5mm.

This is the stock link.

http://i977.photobucket.com/albums/a...k/IMG_5380.jpg

Here is the modified link, camera wasn't moved. I didn't check the focus that's why its blurry and looks like the camera was moved.

http://i977.photobucket.com/albums/a...k/IMG_5381.jpg

Modified link again. Bucket curl maxed out, hitting the arms.

http://i977.photobucket.com/albums/a...k/IMG_5382.jpg

Stock link at a little less than maximum lift.

http://i977.photobucket.com/albums/a...k/IMG_5385.jpg

Modified link.

http://i977.photobucket.com/albums/a...k/IMG_5384.jpg

I forgot to take this picture with the modified link installed, but to get this range of motion I took out the glued on spacer around the curl piston rod that limits how much the piston can extend.

http://i977.photobucket.com/albums/a...k/IMG_5386.jpg

Here's a picture of the spacer. It is 15.1mm long.

http://i977.photobucket.com/albums/a...k/IMG_5391.jpg

Tracking says I should get the Orings on Monday, so hopefully I will have a video by then to show the new range of motion and/or any catastrophic failure :lol:

Re: LR634 is HERE!!!!! Tracked loader
 

What is the third piece in above picture? Is it a spacer/restricter for the travel of ram? Just curious.

Re: LR634 is HERE!!!!! Tracked loader
 

Cooper. Yeah I placed the spacer next to where it was originally on the piston rod, it limited the extension. The piece to the left of the spacer is the threaded hydraulic cylinder end.
Does that make sense?

Re: LR634 is HERE!!!!! Tracked loader
 

Nice idea for increasing the bucket curl performance! I'm curious to know if by removing the cylinder's internal stop sleeve you might run into problems with the bucket bellcrank getting stuck in an over cam/over center position when dumping the bucket?

Re: LR634 is HERE!!!!! Tracked loader
 

When dumping the piston retracts. The internal stop sleeve only limited things when the piston extended.

Now their might be issues with the lengthened link/bar/thing. I might still have to adjust the length because of the overcam thing.

Re: LR634 is HERE!!!!! Tracked loader
 

Right you are about the cylinder retracting to dump the bucket. I didn't put two and two together. When you do get try the long bucket to bellcrank link, let us know if it does over cam itself.

Re: LR634 is HERE!!!!! Tracked loader
 

I definitely will. I plan to have a video of it operating by 8pm Monday if the Orings arrive like they should. I brought in a bucket of dirt last week, so rain or shine I can test things out.

Re: LR634 is HERE!!!!! Tracked loader
 

Espeefan, you were partially right. It did cause problems leaving the internal stop sleeve out. Now I can curl the bucket back more but this causes problems if I don't uncurl it a little when lowering the bucket. The lift pistons fight the curl piston when lowering the bucket with it curled back. I blew a tube and ballooned another one in two spots.

With all the hydraulic lines connected the pressure jumped to 22bar at times. I am going to lower it a little and try to operate it the way it is. Normally when operating and lifting a bucket of dirt I always dump it and then lower the bucket so I don't think this would be an issue in normal operation. I am uploading a video right now, doesn't explain things that well, but at least you can see what is happening.

Re: LR634 is HERE!!!!! Tracked loader
 

http://youtu.be/HFAJzpG8cpE

The Orings kinda worked, in that I had to cut down the OD to fit into the grooves. On the lift pistons one of the sealing edges was torn out too. So the Quad or X rings that I got didn't really work without modification. I might try some other sizes if I want to purchase a 100 of each size from Mcmaster. This order was from theoringstore.com which lets you buy them individually.

I used my Xuron flush cutters to trim down the outside of the Orings, and so far everything is sealing.

For screwing the hydraulic cylinders closed I used two pieces of bicycle inner tube. Just wrap it tight so its stretched and twist. Then I used some tube to cushion the jaws of pliers to tighten it down a little.

Re: LR634 is HERE!!!!! Tracked loader
 

Monkeying with the geometry of the Scale Art loader bucket caused over-cam problems too, and I can tip the bucket too far back in a lower position as well... but I always keep the bucket level after it's emptied. I set the pressure to 17bar.

On the bucket, the distance between the connection points of the drag link & loader arms with the S/A was about 36mm (my memory is ?) and the Stahl WA500's bucket was less, I think it was 31mm. That wee bit of difference made a huge diffrenece in the dump radius, especially at lower height of the arms.

To correct the over-cam issue, I drilled & installed a bolt just below the drag link, so at full height of the arms & full dump of the bucket, the bolt stopped the drag link from over centering.

I saw Rcguy's Carson bucket at the St Louis meet in 2012 and measured the distance between the two points, I can't remember what the number was, but it was greater than the OEM Scale Art.

http://img.photobucket.com/albums/v1...ps7a04c22f.jpg

Re: LR634 is HERE!!!!! Tracked loader
 

Joe, I went through your whole thread on the 4x4 forum last week and saw that when you changed the bucket on the S/A loader. It kinda also pushed me to try modifying mine too.

My brain!! I just spent some time with the radio and watching Youtube videos on how to program it, I have a lot too learn.

I setup a switch that when flipped opens both of the valve servos without activating the pump to release the pressure in the lines.

As for my pressure relief valve, I turned the pressure down but then turned it up, and turned down the speed that the pump turned at. Now the pressure averages around 15bar but if I keep raising or curling it slowly climbs and peaks around 20bar I think. I like it this way better, it's smoother and it takes awhile to increase pressure over 15bar. I still have SO much to learn about programming the radio.

Re: LR634 is HERE!!!!! Tracked loader
 

Nice machine

Re: LR634 is HERE!!!!! Tracked loader
 

Just saw your video on the bucket binding issue Avel. The link is definitely too long. The reason it only happens at a certain range or boom height is when in a lower position the bucket hits the boom before the Z arm ( the link between the cylinders and the "dog bone" ) can travel beyond center.
The best way I can describe is ..... As you curl the bucket back the link is pulled straight back. Yours I see very well at the 4:20 minute mark, the link stops pulling straight back and starts to rise. Now when you boom down the bucket can't pivot and dump and binds.
Clear as mud? :lol:
To figure out proper link length I think you should calculate your length with boom in that trouble spot and be sure that it is still level or linear and not rising at end of stroke.

If you want to maintain new dump range, the only way to fix is a longer Z arm on the lower pivot point.

Congrats on a beautiful machine. Just the sound of the hydraulic system says Quality. Very nice., wish I had one.

Mario

Re: LR634 is HERE!!!!! Tracked loader
 

I've never seen a perfect Z-bar linkage, my neighbors hough has a relief valve on the bucket cylinder, for binding issues!
Cheers, Neil.

Re: LR634 is HERE!!!!! Tracked loader
 

Avel, I would try and remake the link for the bucket too. Like Mario suggested, position your loader arms and bucket in the position where the binding begins and see if you can figure out a new dimension for a shorter bucket link that would alleviate the problem. It might take a little trial and error. You could use a piece of threaded rod with some rod ends to make an adjustable link. That will make it easy to adjust the length for testing so you can hopefully find a happy medium.

Re: LR634 is HERE!!!!! Tracked loader
 

Way cool!!!

Re: LR634 is HERE!!!!! Tracked loader
 

Any progress on your loader?

Re: LR634 is HERE!!!!! Tracked loader
 

What you need to do is make a smaller spacer try one half the size first and go from there. Ed

Re: LR634 is HERE!!!!! Tracked loader
 

No new updates, it just sits there on my desk. I started a new job as an Over The Road truck driver, and have only been home 3 times since. Still getting used to the new job, and haven't taken the loader with me. I only have my Legos with me in the sleeper for when I do a 34 hour reset ;)

Re: LR634 is HERE!!!!! Tracked loader
 

Wait you have to weld the chassis?

Re: LR634 is HERE!!!!! Tracked loader
 

No you don't weld the chassis.

Re: LR634 is HERE!!!!! Tracked loader
 

Long time no update. Well I finilly got home. I ordered some of the nickel silver teeth from Premacon for the LR634, and their 3mm hydraulic tubing. It seems to be stiffer than what came with the leimbach hydraulic kit, hoping no more burst hose at 20bar. Also bought some Road Trucker tires for the drives on my King Hauler.

Last time I was home I connected the battery the wrong way to my Turning 9x transmitter, and fried something. So I ordered their new one with telemetry and 10 channels , the HD i10.

I will try to desprue the teeth and install them and replace the tubing and program the transmitter for the lr634 before I leave again.

Re: LR634 is HERE!!!!! Tracked loader
 

https://drive.google.com/folderview?...0U&usp=sharing

Also last time I was home I installed Roady Wide tires on the steers. Packed them with BB's and then superglued the tires to the rims. I only glued them on after having a tire roll off when going over an obstacle with 20 pounds on the fifth wheel. I want to eventually turn the Knight Hauler into a dump truck, or buy one of RCP's? dump trailers.

Link has pictures of the items from my previous post, will post images properly when I have some time.

Oh, forgot. Also bought a Scale Driveshaft too. I took the struts off of the truck for a bit more articulation and the stock driveshaft would bind up and almost fall out sometimes.

Re: LR634 is HERE!!!!! Tracked loader
 

That hyd tubing is probably the same stuff Fumotec & Vario use, definitely high pressure line, but it don't like to bend tight radii... if you do need to make a tight bend though, careful use of a hot air gun works well.

Also, the use of this type of hyd line, did you get all new fittings as well? I don't think this type of hyd line will work with Leimbach's barbed fitting & press-on collar.

Re: LR634 is HERE!!!!! Tracked loader
 

Good point, I'll see if I can make it work.

Re: LR634 is HERE!!!!! Tracked loader
 

You were right, Lil Giants. The Premacon 3mm Hyd tubing is just stiff enough that I had to order new 3mm fittings from Premacon. Will post updates when I receive them.
Cleaning and lubing after having the loader sit over a year.
And my metal teeth.

I was only able to slip the 3mm tube over the stock T connector, all the other fittings were slightly bigger.

http://i977.photobucket.com/albums/a...k/LR634/31.jpg

http://i977.photobucket.com/albums/a...lk/LR634/3.jpg

http://i977.photobucket.com/albums/a...lk/LR634/t.jpg

Re: LR634 is HERE!!!!! Tracked loader
 

Yesterday I was motivated enough to work on the loader some more. I started by rearranging the battery and all the electronics to be as hidden as possible from view. I stacked the Sabertooth2x12 in the rear with the receiver on top of it. I am just going to go with the one 3S 8Ah battery. I laid it flat down and covered the whole battery with some foam packing material. Then I hotglued small pieces of velcro so that everything would stay together.

I also hotglued in a mesh material over the fan to prevent any wiring from being chewed up in the fan blades. The metal mesh came from a cooking oil spatter guard. The mesh was actually very soft. I taped a paper template on it and cut around it to the rough shape. Then I just pressed down with a used Xacto blade and it cut right through. Popped it in place, reheated the old hot glue with a soldering gun and applied more hot glue around the edges to make sure nothing sharp was exposed.

After the mesh was installed I went back and tried to reduce the wiring clutter. I soldered together a new, more compact, connector/s thingy. It's ugly but it'll do for now. I need a terminal block and some solid wire, that would look a lot cleaner.

Also spent some time messing around with the radio and trying to relearn how to use it.

http://i977.photobucket.com/albums/a...64b28b8157.jpg

http://i977.photobucket.com/albums/a...e8201e9ea6.jpg

http://i977.photobucket.com/albums/a...7b76b938b6.jpg

http://i977.photobucket.com/albums/a...23d481341d.jpg

Re: LR634 is HERE!!!!! Tracked loader
 

Look's good Avel, I just received my 634 last week, It's nice to have all the pictures and post's for this machine from you guy's that have already taken the challenge...

Yours looks great,

David

Re: LR634 is HERE!!!!! Tracked loader
 

These posts also help me recall how and why I made certain modifications. Just last night I disassembled the cylinders and nicked the piston rod. I should of been more descriptive in how I managed to disassemble the cylinder last time. But at least the rod was nicked close to the end where it wouldn't cause any problems when operating.

Also I did a lot of reading of what other owners of this loader had done.
There are a lot of German forums that I spent time on too, I used Google Chrome's translator to kind of understand what was happening in the pictures.

http://www.modelltruckforum.de/

http://www.modelltruck.net/

http://www.modell-baustelle.de/

Re: LR634 is HERE!!!!! Tracked loader
 

Back in December, while waiting for my hydraulic fittings from Premacon, I wanted to work on the LR634 and decided to finally wire in some lights.

I had some 5050 size leds that I had bought for this purpose back in 2014. They are a perfect fit. I used enameled wire soldered to the leds. Then popped the lights into the enclosures and installed the lens and secured it with MEK.

I used a resistor calculator online to find the right resistor, I ended up using two resistors in parallel to get very close to the recommended resistance. Found them in an old power supply. I put copper tape around them because they were getting hot, my resistors are a bit undersized.

For the dual lights in front I shaved down the stepped dowel part that goes into the roof because I didn't like how far down they hung from the roof. I didn't shave them down in the back, wish I had. I made a "box" out of some corrugated copper sheet, glued it inside the cab and soldered everything together . I used some hot glue to attach the wire that runs inside the corner down to the body.

I have it hooked up to a switchable on/off 6v BEC.

I received my fittings from Premacon two weeks ago, just don't feel like working on the LR634, so maybe in May i'll get working on it. For now I've just been playing with a 1/10 Axial Yeti RC car.

http://i.imgur.com/iHVUEFCl.jpg

http://i.imgur.com/i33EsWZl.jpg

http://i.imgur.com/RDfPQVvl.jpg

http://i.imgur.com/MJ49BScl.jpg

http://i.imgur.com/x4NhOqGl.jpg

http://i.imgur.com/rmzL0RKl.jpg

http://i.imgur.com/id4tYkXl.jpg

http://i.imgur.com/EVlJGfel.jpg

http://i.imgur.com/BXwOBOgl.jpg

http://i.imgur.com/kJxmKMml.jpg

http://i.imgur.com/Bcj6DV3l.jpg

http://i.imgur.com/d2DMr1cl.jpg

Re: LR634 is HERE!!!!! Tracked loader
 

That looks great!! Thanks for sharing. I'm in the process of adding lights to my PC700. I'm not familiar with electronics so why did you need to put a resistor?

Re: LR634 is HERE!!!!! Tracked loader
 

This loader just keeps getting better! Wow.

The resistor is a current limiter to keep the leds from destroying themselves.
http://www.rctruckandconstruction.co...read.php?t=441

Re: LR634 is HERE!!!!! Tracked loader
 

Thank you for that link too.:D
In the second picture just in front of the ruler, aren't those resistors? Why not use those? I just purchased led's and it came with those style resistors but didn't know what they were for.

Re: LR634 is HERE!!!!! Tracked loader
 

Yeah those are the resistors I used. I glued them to the cab roof inside that copper/ gray painted thing.
Here's the calculator I used to find out what resistors to use for my needs.
http://ledcalc.com/#calc

Re: LR634 is HERE!!!!! Tracked loader
 

Thank you! Now I see the resemblance.