300 Utility Hydraulics

u00bgg2

Member
So I have a 300 utility with a front loader, been pecking away at it little by little as she was rough from the start. The tractor has a front loader and they have been slow and a little weak from the start. I did some reading on here and have taken the tank apart and have cleaned the filter screen as well as flushed the system, done entire procedure twice. While the hydraulics are marginally better, they are still slow and weak. To be clear my reference is to the front loader, the rear seems to be fine, in line with other tractors I have owned or operated.

The loader does increase in speed if you throttle the heck out of it, tach does not work so I can state RPM but I am guessing 2K or so it moves as I would expect at idle or just off idle. If it is just a low idle (500 or so) it will not even move the loader.

So what I am trying to understand is this "normal" with an older tractor? The other tractors with front loaders I have owned were newer (mid 80s and up).

If it is not common is it likely the pump it self?

Brian
 
I assume the tractor is using the pump attached in front of the distributor. The pump is likely worn quite a bit. If it works better when first
started, then within 1/2 hour gets weaker, it needs a new pump. Rebuilds are not available, they are usually worn in the housing and that can't
be repaired. The other issue is pump volume. The original pump is 1200 psi and modest in volume. If it works OK for the hitch, My suggestion is
to leave it alone and purchase a front mounted pump with about 14 to 16 gpm output, and 2000 psi or more pressure capability (it, or new controls
must have a pressure limiting valve to prevent dangerous pressures and broken components. Jim
one place to look
 
(quoted from post at 14:08:30 06/01/20) I assume the tractor is using the pump attached in front of the distributor. The pump is likely worn quite a bit. If it works better when first
started, then within 1/2 hour gets weaker, it needs a new pump. Rebuilds are not available, they are usually worn in the housing and that can't
be repaired. The other issue is pump volume. The original pump is 1200 psi and modest in volume. If it works OK for the hitch, My suggestion is
to leave it alone and purchase a front mounted pump with about 14 to 16 gpm output, and 2000 psi or more pressure capability (it, or new controls
must have a pressure limiting valve to prevent dangerous pressures and broken components. Jim
one place to look


So can you educate me regarding the front mounted pump? Ironically I have a woods backhoe that has a PTO mounted pump that I thought out T-ing into, but there are some draw back for that. The front mount pump would be better for me, I just dont know anything about them.
 
Ok, so you have a PTO driven pump for the backhoe. Obviously you have independent PTO, runs whether clutch is pushed in or not. Use this pump as it should have plenty of capacity.
 

I had considered using the backhoe PTO pump but I don't always have the backhoe on the tractor, hence why I was interested in comment around the front mount pump. I have done some additional reading and some looking and I am not sure I can mount one on the front of the 300U. I see an access hole for the hand crank but that does not look to be big enough to get a shaft through for driving the pump. I saw some other older tractors running this off a pully from the crank, bracket off to the side kind of like and alternator.

I can make the brackets and pretty much all I need but would like to see so I can replicate.
 
That hole is just fine for a pump. Here is an image of the front showing mounting holes for a pump mount and other things. Make sire it is
mounted straight (axially) with the crank shaft of the engine. Thousands in use. Jim
 

Janicholson, am I missing something, I did not see a picture? :D

Would like to see a picture though... :lol:
 
Ill try again. You can see the 4 threaded holes used to attach an adapter for a pump. It is a flat mount surface. Jim

cvphoto45925.jpg
 
(quoted from post at 14:17:25 06/02/20) Ill try again. You can see the 4 threaded holes used to attach an adapter for a pump. It is a flat mount surface. Jim

<img src="https://www.yesterdaystractors.com/cvphotos/cvphoto45925.jpg">


Roger that, I see it. My tractor has front brush guard on it so obviously I did not dig deep enough. Next question would be, if I run a front mount pump will I need to have an additional hydraulic tank? Reading the other posts regarding the 300U hydraulic system and how it functions, I would say yes but wanted to double check.
 
The "new hydraulic system will need a separate reservoir. The original under the seat reservoir is suitabe for the original pump and volume, but
not a bigger pump. My suggestion is to mount one on the loader frame. Putting the outlet (suction) higher than the pump makes priming certain.
(it will be an open center system.) Jim
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top