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Update just to let anybody know. It was the pump. They put another one on it and it now dumps fine.

Well I would agree with you on that but the problem is is that everything has been replaced with bran new parts except for the pump they have all then rebuilt ones. The first rebuilt pump we put on it would not even lift the bed the second one worked fine for about 2 dumps and them got weaker...

Yessir thats what I was thinking. I am hoping that our problem is the rebuilt pumps. Hopefully we can get them to put a new one on it and that will solve our problem. But I’m starting to think that they are gonna keep throwing excuses until our 60 day warranty is up. 🤷🏻‍♂️

Yes we were hauling 10 to 12 ton loads with no problems before. The mechanics just put 5 tons in it and said it dumped fine but I know good and dang well they had to give it fuel to make it dump even the 5 tons. I thought they were going to put a gauge on it but nope just told us we are over...

Update. Truck was sent to shop and they informed me that we are overloading the truck hauling 10 to 12 tons and we should only be hauling 5 tons. Truck was dumping 12 tons with absolutely no problem until the drive shaft came off and busted the pump. Does anybody have any ideas. We are at a...

Both keys were put back in and set screws tightened but that doesn’t mean something hasn’t sheared so I will definitely check that. And no I have not physically watched while trying to dump a load but I have while raising and lowering with it empty. Thanks for the info on something else to look...

Yes I have manually moved the lever from under the truck with save results. And thanks about the oil because I didn’t think that that was an issue.

Hey guys I’m new here and looking for any help I can get. We have a m817 dump truck that the drive shaft for the pto came off of the transmission side and stuck into the ground while drive and it broke the input shaft of the hydraulic pump. Truck is loaded. Get a new pump put on and it will not...