Discussion in 'Large Equipment' started by kcurbanloggers, Feb 10, 2018.
Neighbors might not like it.
I’d let em light it off, they’ll come around.
or sail far far away.
So good news on a the cylinder. The rental guys called back and determined that the break was not my fault. They agreed that the joint had not been greased and seized up. So it looks like I’m in the clear. Thanks for the help everyone.
Sent from my iPhone using Tapatalk
That's great news!!!
Wow I am impressed. For sure let them know how you appreciate when they could have taken advantage and gotten you to foot the bill. Thanks
Lots of six way dozers still run no blade stops. Breaking cylinders on them is a well known problem. I just spent four years working for a rental company (did my whole HD apprenticeship there) and 11 years before that building leases roads and pipelines running dozer and it is a well known failure. What causes it is corner bit ripping, digging stumps and rocks out, tagging things with the corner of the blade angled back at full angle etc. If you watch your blade when you angle it all the way the blade will slightly settle back when the angle control is released. There is a small poppet valve in the glan on the cylinder rod that allows a small amount of cushion on the cylinder at the end of its travel. What happens when you hit the toed in corner of the blade on something hard is that the impact on that corner pushes the corner back through this small cushion travel until it is mechanically stopped. The rest of the flex energy in the blade and c frame is transferred to the weakest point which is the fused weld of the rod eye on the other angle cylinder. The rods are meant to push, not be pulled in a shock loaded manner so they break off. The remedy of this is to build a blade stop that mechanically limits the blades angle travel. Our dozers has plates on the c frame that contacted the rear face of the blade at the end of angle travel to eliminate over travel shock loading due to blade flex. This was a really common problem in the earlier D6R dozers with Weldco 6 way blades, and that was the remedy for it. The rod eyes on these cylinders are fuse welded. The rod and eye are spun in opposite directions really fast and lots of pressure is added between them creating great friction and making them weld together. There needs to be a weak spot and trust me breaking an eye off is much better than busting a glan off. We had one two years ago that broke the glan and it disintegrated. The resulting contamination cost $120,000 to repair and took three months to complete.
I was late to read this very interesting thread. But absolutely delighted that the rental company recognized the failure from no lubrication. Glad it worked out for you.
I've always been told to not use a 6 way for pushing stumps for the reason that it'll break the angle cylinders or the pivot. Dunno, I'm not a dozer operator. Tried it once and what I thought was a fairly straight road could have just about been used at a motocross track with all the "panse de vauches" (no idea what you english call that, it translates to cow bellies.)
Yup you should avoid it. We did it a lot but you had to be careful. You could also set the circuit reliefs down a bit and that gives a little wiggle room as long as your cylinders aren’t bottomed out one way or the other
Separate names with a comma.