/ 425 - model year changes and price check #21
Mine won't lift 1000. I know this for a fact. I took cement blocks and stacked them in the large light material bucket with the bucket a couple inches off the trailer deck until it tipped forward and the bucket sat on the trailer with the machine's rear wheels off the ground. I then sat on the machine and it tipped back down. I reversed from the trailer, and as I turn the steering wheel, the machine tipped forward again. Straightened it out and it tipped back.A 425 is rated for 800lbs, but will lift 1000lbs. At least mine will. For a 1300lb machine, that is an exeptional lift capacity to weight ratio. I have set boulders in retaining walls with this machine that were most likely pushing 1200lbs. The "PT Pucker" allows you to lift more than the machine should be able to.
The center section of the machine is composed of a top linkage rod and a bottom ball joint. The bottom ball joint is held in place by two split rings. One top and one bottom. When you lift a load, alot of that stress is transferred to the top split ring. As best I can tell, this is the weak point of the center section. If you try to increase the lift capacity beyond what it will currently do, you might consider welding a bushing in place of the top split ring.
Hope this helps
I have measured mine in a similar manner. My 425 was built in 2004.Mine won't lift 1000. I know this for a fact. I took cement blocks and stacked them in the large light material bucket with the bucket a couple inches off the trailer deck until it tipped forward and the bucket sat on the trailer with the machine's rear wheels off the ground. I then sat on the machine and it tipped back down. I reversed from the trailer, and as I turn the steering wheel, the machine tipped forward again. Straightened it out and it tipped back.
We all know this as the PT Pucker. The center of gravity moves fore and aft as the machine gets shorter and longer due to the articulation when turning.
I weighed one block and multiplied it by the number of blocks in the bucket and it came out to something like 650 pounds. Add to that the weight of the large bucket, something like 100 pounds (don't know exactly, but I can pick it up off the ground and carry it by myself and I'm not THAT strong). Then add to that the distance from the Quick Attach where I believe they measure the lift capacity from without attachments, and I get about 800 pounds of lift capacity.
The dump/curl circuit has some power to it. If you use an implement like a lever, you can move some hefty weight (and bend the implement if you're not careful).
Anyhow, they have some powerful hydraulics, I'm satisfied, and I'd buy one again today if I needed another one.
Someday, I'll repeat the above mentioned experiment and document it with the large bucket AND THEN the pallet forks where I can stack them straight up close to the QA plate.
While I agree that pound for pound, the PTs are outstanding loaders and will run circles around a conventional tractor with a front end loader of similar size, I still don't think the 400 series will lift 1000 pounds without tipping on it's nose. Nothing to do with the strong hydraulics. It's just the leverage of 800 pounds sticking a couple feet out from the front axle centerline will have a pretty good chance of balancing the 1200ish pounds behind the front axle.This is rather funny, my 422 would pick up a heaping bucket of modified stone as i fixed the driveway many times. Modified stone weighs 3000 lb. to the yard and that is 27 cubic ft. so thats 111.1 per cubic ft. times 9+ is a 1000 lb.+ for being heaped. They aren't weak at all, they will bury a CUT with a loader....... jim
I understand that they calculate the rated lift at the QA plate. My machine will not lift 1000lb in a bucket, even if it's curled all the way back. The rear end will come off the ground first.I guess you don't understand how you rate what a machine will lift. All loaders are rated with two things struck and heaped with the bucket CLOSED not flat on the ground. The newer ones with the longer arms will lift less than the older ones and you put all the blocks you want in the bucket closed it will lift a 1000 lb. You don't carry a load in a loader bucket except closed.... jim