I've learned more about hydraulics in a few of your videos than I ever thought possible. Now I understand much more why my mini ex responds the way it does. Great channel!!!
It is very dangerous as the acceleration increases when going down a hill. Should I install an expensive counterbalance valve? I wonder if this is possible with a flow control valve.
Front side of the boom vs rear side of the boom really doesn't matter. It's whether the cylinder is mounted rod end up or down that changes lifting vs digging forces. One thing I will mention that with the front mounted cylinder, one has to be careful if you add a quick connect attachment or install a tilting bucket that the buck can now hit the boom cylinder when fully retracted.
The side the ram is on, is the deciding factor. It doesn't matter rod up or down depending on which side of the boom its on. Back side will always be lifting with the rod retracting whether its up or down. Front side will always be lifting with the rod extending, whether the rod is up or down.
@@OUTDOORS55 My bad. You are correct. I was thinking force would be on the other side of the piston, but extending is extending whether its upside down or not.
Every one of these videos is very informative and so clear. I’m only just now getting into excavator ownership (just got an H15 which I’m ordering one of your oil cooler/filter kits in the next few days) but I’ve done tractoring and backhoe for a while and never knew any of this stuff which totally applies there too. . Really appreciate it!
Class is in session, great video, let me send you a Lavalier Wireless Microphone brother so we can hear you crystal clear :) Your a genius, I'm going to feature you on our website. You Rock!!!
Another thing to consider is that when the cylinder is at the front of the boom, it lifts and lightens the boom so the lower joint of the boom is under less load versus when the cylinder is other side of the boom.
How did you get the initial 'nut' (gland) off? Did you just use a large pipe wrench? I don't see any spots to be able to use a typical cylinder wrench.
My machine has some creep in the arm boom. If I have the arm extended and let it sit, the rod slowly travels out of the cylinder and the arm slowly lowers over time. Does anyone else's machine's arm slowly drop over time?
Knowing what you explained in the dynamics of the cylinder operation I never gave the trade off any thought when repositioning the cylinder. Nice informative video, thanks
Cam Did you ever think of putting a valve on the Briggs motor to drain your oil. It saves a lot of cleanup when draining your oil,I got mine at Napa, about $30.00
Love all the videos in general. Makes buying one much easier. Any chance you are planning on making a filter extender for the L12 style tanks and adding it to the store?
Good vid, Cam. Another feature trade-off is that a top-mounted cylinder will allow deeper digging than a bottom-mounted cylinder, along with better down force. That is cuz a cylinder on the bottom of the boom is more limited in retraction geometry, and is likely to hit the edge of your hole. Hence the tiny 5.5' digging depth of most of these 1-tonish minis.
How much lifting power is lost by the change in the geometry by moving the cylinder from the front to the back? I would imagine that there would have to be some pretty significant engineering changes to equalize the leverage. Cost v. benefit analysis seems to bear out that adding a shield to the original cylinder and maybe having to replace a cylinder if you have an 'oh shoot' moment would be better.
Hello, I am a big fan of yours in my country and I am inspired by your channel. I przymierzam się do kupna koparki z chin czy pomógł by mi pan w jej zakupie ?
Great explanation Cam! Has anyone tested both lift cylinder configuration on 1Ton units in real life to see if it makes a significant difference? I ask because right now, I'm considering models that have implement both configurations...would I loose significant "real life" lift power if I went with a top mounted cylinder machine?
The force to lift the boom using a top-mounted boom cylinder will be when RETRACTING the cylinder. As Cam explained, retraction exerts less force than extension because the rod volume reduces the force on the piston. Whether the rod end or the base end of the cylinder is up, it still needs to retract to lift.@@smitty_1
