1/10 Liebherr Excavator R 984 Litronic

[JAMMER]

Hello Markus well this is some more very nice work. I see you soldered every thing together. I my self would have preferred threading the barrels but it your parts so who am I to tell you how to do it's only a suggestion. You are moving right along you will be moving dirt very soon. Ed

[Markus K.]

Thank you, Ed. No problem with any suggestion or different fabrication methods, this could bring some new ideas for following stuff. So they are very welcome! But in this case I want to do it scale and the cylinder can be opened by removing the (again selfmade) hex-bolts M3 from the head.

This pictures shows the rod at the piston end. It has a diameter of 16mm and received a M10 thread and a groove for the gasket. The piston was finished directly mounted on the rod for 100% center fit. After all I think the loctite on the thread should be enough to seal the rod and piston, but the o-ring can't be bad, either.
The bottom parts of the cylinder were silver soldered, because there wasn't a area big enough for soft soldering. To avoid desoldering of the cylinderheads i put them upside down in a small bucket of water.

[JAMMER]

Markus very nice work on the cylinders. Permatex has a special compound for sealing cylinders and hydraulics I use it all the time and it works real good. At the moment I do not have the number for it but if you want it I can get it for you. Ed

[Markus K.]

Then the tube needed a clean-up. For this i made a simple 4 jaw chuck, whitch worked really fine for this light cut. After this i made some brass cubes for connecting the pipes. Again I made a little tool to chuck the square stock centric in the 3 jaw.

Ah, Permatex! Amazon supply this stuff in Germany. I'll take a try on the cylinders for the next model.

[Markus K.]

There are more pictures from the cylinders, so here we go. Pic 1 and 2 is the bucket cylinder (equal on the R984 and the R9100). Pic #3 is the stick cylinder (single on the R9100 with a much bigger diameter, 30mm bore and 18mm rod), pic #4 is a hoist cylinder for the R9100 and the last pc shows the front end of the R984-hoist cylinder in detail.

Hope, those many pictures are not boring you guys!

[JAMMER]

Ah some more of you excellent work. The tube bending is hard I have done some on my excavator. Ed

[Markus K.]

I just found out, that there is no picture in my album just showing a completed cylinder, anyway, here a last pic for now from the cylinders.

Then I wanna continue with some railing work i did for both excavators. It´s all brass tubes with 4mm diameter, just the same as for the hydraulic pipes. The railings in the last 2 pics belong to the R9100. I used a small tube bender and a microflame to heat up the pipes before bending. That makes the brass soft.

[RCKiwi]

Very nice machine work. Clever turning jigs! I'm watchin til she turns sod
Keep up the good work and keep them pictures coming!

[Lil Giants]

The best is yet to come... wait till you see how big the digging bucket is.

[Markus K.]

Originally Posted by thuangs

Thanks for sharing Markus! These parts look extremely beautiful! I also found it difficult to do cooper blazing with different material, i.e. my cylenders are made with SS304 but tube was cooper. Even I heat it to extreme high temperature, join won't hold very well. But yours are all the same...blazing result shoudl be good.

I am a big fan of your R984C!

Best regards,
Kevin

@Kevin

Hi, what kind of soldering/ brazing? Silver or soft? Did you use any flux?

@Joe

well, yes... the bucket... don't forget the chains

let me just throw in the counter weight. It was milled from a solid Aluminum block 410x180x80mm with a weight of 16Kg. The finished Block is round about 5Kg and way too light. It will receive some inlays from lead to bring it to the necessary weight again. I try to bring it up to 17Kg. First some drawings, you can see the lead blocks inside the weight, how it should be finished and right from the mill.

[JAMMER]

Hi Markus that Permatex sealant is Permatex Viscosity Hydraulic Pipe Sealant # 54550 I get it in 50 Ml bottle on line for $24 and change from ALL-Spec Ind . Ed

[JoelSund]

Hi

I must say that it was a very good looking 984.
I can not believe how you make all the parts. Do you have the original drawings or do you have an excavator disassembled that you copy?

To my next question. I have repaired a 984 many times and my brother drives one at the job. He is totally in love with it.
So I have planned to do a small copy of the counterweight to his birthday, but I have problems with the drawings. then I saw that you've just made one of those, and one that looked very much like the original.
So I was thinking of doing a little long shot and hear if you stil have the cad drawings and if you want to sell a copy to me.

I would be very grateful if you could. I'm a little tired of climbing on the machine with my measuring tape

Best regards, Joel Sundstrom

[Markus K.]

Thanks for the #number, Ed!

Markus

[Markus K.]

Good morning,

today the first boom pictures. I choose the short one for the model. It measures from main bolt mounting to stick bolt mounting 780mm.
It's not only a foursided housing, there is some structure inside to stiffen the whole thing. As you can see, the drum inside is made with two halfs whitch were welded together. The outer diameter is 74mm.

[Markus K.]

some more...

it came together very well, all parts got mounting noses and holes like a puzzle again for easier setup. Then the noses were welded at the outside to avoid warpage. Michael did an amazing job on the mill and fabricated the massive steelpart. It will take the two stick cylinders.
The stickside of the boom were doubled up with some lasercut parts and after this I wrapped a belt strap around the sandwiched parts.

[DADSGARAGE]

Wow Markus....really like this build !! Great ideas, excellant workmanship and a larger 1/10 scale...looking forward to seeing more..well done!!

What is the size of the bucket??

[Markus K.]

thank you guys for your comments. I'm looking forward to show the stick today.

About the bucket, well, it fits to the machine ;-) it is a massive HD Bucket for digging rocks. Sure I'll need some other ones for digging in sod and topsoil, the Rock bucket will be rather ineffective for this. For easy changing there will be a hydraulics operated quick coupler. The bucket needs some more welding, but I ran out of gas for the tig.

greets Markus

[Markus K.]

Hi guys,

here some stick work. I made two of them, one fits to Michaels R9100. The lathe bcame more and more useful, here I did the slope on the frontend parts of the stick. It comes together very well, but due to double cylinder action I did a little line boring and reaming on my lathe.

[Markus K.]

Here are both together

[Markus K.]

And the last ones including the levers and the pushrod. The first picture shows a bushing, it will be loctited in. Markus