1/10 Liebherr Excavator R 984 Litronic

[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.