Which hyd excavator pump/setup for a newbie

[Lil Giants]

The diameter you have is the same as the excav in the video. That excav is quicker than earlier Stahl hoes I had b/c it's using 2mm plumbing, the earlier ones were 1,5mm ID. That extra 0,5mm in dia made a notable difference in cycle speed.

Increasing the pressure will make it flow faster too forcing the oil through the lines quicker. But if you are putting this into a plastic Bruder model, the arm/pivot points will break.

My 850 uses a 0,3ml/revolution Jung pump and it's capable of 1200ml/min. The cyl bores are 20mm (boom/bucket) & 22mm (stick), all four cyls filling from the bottom of cyl at once makes the overall speed quite slow with 2,5mm ID hoses.

Premacon's 944 excav uses a Jung pump, maybe the 0,3/rev with I'm assuming 14mm bores, the cyls move way too quick making the model unrealistically fast & the operators spill dirt everywhere, hit the trks, ect. Proper radio programming could prevent a lot of that with much finer control on the tx sticks.

[Actros4160]

Mike,

if you decide to go with the Jung pump make sure you get a pressure relieve valve with it. You can set the pressure to your need.
I hope will help you and have fun with your bruder conversion.

Bernd

[Mike205]

Hi,

Got me the kit, postage was real fast, it was posted from Germany on Friday and delivered Tuesday to Uk😀
Everything beautifully machined, a shame the instructions are only in German.
Next task in hand is to make a replacement metal arm for the cat, as my original was pretty badly cut up and weakened due to making space to fit servos inside for my screw drives.

Its a shame i don't have the equipment and especially the talent that you guys have when it comes to quality builds, i'll just have to see if i can pull it off.