Kelley loader on massey 275 couldn't fully lift 1000lbs

petebert · Aug 30, 2023

Been running a Ford 3600 for the last 10 years which actually has a Massey loader on it. This loader is just ran from one of those plates under the drivers seat.

Picked up a pretty decent looking Massey 275 which has a Kelley 800 loader on it. This loader is ran by a pump made by Cross that's mounted to the front of the engine. The speed of this loader is really fast, kind of two fast because if you don't ease off the controls it comes to an abrupt stop and clunks and twists.

The Massey was supposed to replace the Ford and I was going to sell the Ford to recoup some of my money. Well I went to use the Massey today for the first time to pluck a 1000lb piece of equipment off a trailer using bucket clamp forks and it couldn't do it. It was kind of tricky because the pallet is around 8' long but with the massey I couldn't get pallet high enough to clear the trailer, and yes when empty the bucket goes pretty high.

So I put the forks on the Ford and it plucked it right off. So anything I should be looking at on the Massey before I sell it? Not being able to lift that much will be a problem.

Dieseltech · Aug 30, 2023

Has the relief valve pressure been checked? If OK, then put larger lift cylinders on to increase lifting power AND slow the lift speed down.

petebert · Aug 30, 2023

Thanks, I'll start off by looking into the relief valve. I don't have an exact model number yet but the control valve says HCI-Prince on it and looks pretty similar to ones that Prince still makes, some of which say they have adjustable relief valves.

Also took some measurements of the main loader cylinder rod. The loader on the Ford has a 2" rod, the Kelley loader on the Massey has a 1.5" rod.

Dieseltech · Aug 30, 2023

I'd put on at least a 2.5 inch cylinder pair to make the loader MUCH more user friendly than it is now.

Steve in IL · Aug 31, 2023

The pushing (lifting) capacity of the loader is much
more dependent on the piston bore of the hydraulic
cylinders than the rod size. How do the piston bores
of the two tractors compare?

bradley martin · Aug 31, 2023

First thing to do is check the pressure in the hydraulic system. I would not mess with the relief valve before doing that.

Jim.ME · Aug 31, 2023

As mentioned, the cylinder bore has more to do with lifting capacity than the rod size. I am not saying the pressure is not too low, cylinders are not too small, the MF/Kelley is no good, or any of those things. I just want to point out that in a case like this, while the item may weigh 1000 pounds, when you put forks on the bucket like that and lift the load you have moved the effective weight of that 1000 pounds to a point about 4 feet ahead of the bucket lip. That is seen as a much heavier load by the loader due to the increased distance from the bucket pins. Loader capacity rating would be for a load in the bucket, not 4 feet in front of the bucket. Just something to remember if things check out as ok. By design the MF loader on the Ford could simply have a greater lifting capacity than the Kelley loader.

Cash4Toys · Aug 31, 2023

Looking at the pictures it looks like the
loader geometry is different. Looks like
the Ford loader arms are longer from the
cylinder pin to the rear arm pivot pin.
That alone accounts for a lot of speed.
Larger bore cylinder would get you more
capacity, and slow it down, but you would
think that it was engineered to get the
most from its weakest point.

Traditional Farmer · Aug 31, 2023

With the MF tractors I have been around about a 90% chance it'll have some sort of hydraulic issue

geok · Aug 31, 2023

This post was edited by geok on 09/12/2023 at 05:28 pm.

BarnyardEngineering · Aug 31, 2023

Can you HEAR the relief valve working when the loader stops lifting? There should be some sort of hissing or squealing coming from somewhere in the system that indicates the relief valve is opening.

If you don't hear any hissing or squealing, it's NOT the relief valve.

You need to pressure check the system.

The front-mounted hydraulic pump is generic and easy to replace. It is likely a Cessna or Eaton or another common brand pump. Doesn't matter they all use the same SAE mounting. You just need one with the right GPM and pressure capacity. Probably a 25GPM pump but you can get that off the numbers on the pump. If you want to slow the loader down you get one with a GPM rating of 15-20.

Loosehandle · Aug 31, 2023

With the load that far out in front its
seeing a lot more than 1000 pounds

petebert · Aug 31, 2023

Yeah that's what I need to figure out. Because while I'm not always going around lifting heavy things, it sure is nice to have that option like I do with the Ford/Massey combo.

petebert · Aug 31, 2023

No I did not hear a hissing sound. I was able to lift it some and then it would just stop. I kept bumping the rpms up and getting another tiny bit out of it but gave up at 1800rpm.

The brand is Cross, they still make what appears to be the same pump here in the US. So far I can't find the model number on the current pump.

petebert · Aug 31, 2023

Here's the fluid spec listed by the pump manufacturer. " Premium quality anti-wear type oil with a viscosity between 100 and 200 SSU at operating temperatures is recommended"

So they don't exactly make it easy but after googling and getting into the weeds a bit with this... It appears any UTF would meet those specs maybe even an iso 46.

Kelley loader on massey 275 couldn't fully lift 1000lbs

petebert

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