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IH 300 Utility hydraulic loader problems

K

kdahep

New User
New Member here and really enjoy this site .
I have a IH 300 Utility with a farmhand loader with trip bucket. I bought this tractor for the loader functions, but it doesn't have a lot of weight that it will lift. Also the loader settles or lowers on it's own. With a blade on the back using the 3 point it will lift the rear tires off the ground. I want to know where to start looking or trouble shooting for the loader lifting and settling problems

Thank you
 
Well if the 3 point is that strong and you run the loader of the same hyds then you either have a bad cylinder that if bypassing fluid or a bad control valve
 
Putting Liquid in the rear tires will help. I recommend windshield washer fluid, used 9or new) automotive antifreeze, or Rim Guard. Wheel weights are also a
good idea. The 300 steering is a weak point, and the gear box is the primary problem. If manual steering, it is just hard to steer, and easily worn, moving
when steering is almost mandatory. No parts are available except used, and those are not likely to be very good. Keeping the oil level up in the box is
critical. The more rear weight you use the less strain on the steering.
Hydraulic cylinder dropping is often the cylinder or cylinders leaking past the piston. If it drifts down when the lift side of the cylinders are capped off,
that is the issue. Only disconnect the hose to cap and plug when there is no pressure on them !!!! Jim
 
I notice some fluid on the ends of both loader cylinders when fully extended. but not enough that it doesn't run in a stream or squirt out. Valve seem to be very responsive on up and down motion.

Thank you
 

If boom cylinder piston seal is leaking & loader control valve spool holds pressure where does the ""displaced oil go"" as the cylinder rod occupies space as rod enters barrel of cylinder when loader boom lowers?
 
The question was, where does the oil go that the rod displaces when it goes farther into the cylinder . The rod takes up space. Been over this a thousand times.
 
Right....If the control valves do not leak, a double acting cylinder will not leak down, even if the piston seal leaks and there is no external leak.

Ben
 

As boom cylinder piston travels inside barrel when FEL boom lowers the space for oil gets less on rod end of barrel due to cylinder rod occupying part of the area inside of the cyl barrel??

If ""control valve is holding hyd pressure"" where does this phantom trapped oil go if rod seal holds & oil doesn't escape between rod & seal.

What in your opinion makes single acting cylinder & double acting cylinder with blown piston seal respond hydraulically any different when hyd pressure is on butt end of barrel?

I agree that bucket cylinders can leak internally on piston seal BUT usually when bucket cylinder internal leakage is noted cylinder rod is exiting barrel not entering barrel of cylinder IE bucket is curling forward(dumping)
 
I have a 300U with loader. The loader runs off a front mounted pump and the loader tube members are
it’s own reservoir. The loader will lift about 900 lbs plus it’s own weight.
 
My farmhand loader will leak down after two weeks but never seen a drop of oil on the ground and brand new control valve
 

I gave some more thought to this problem & I think this is correct.

If hyd cylinder is reversed from the loaders I've seen & operate in opposite fashion & rod end of cylinder is mounted to loader mast & butt end of cyl is mounted to boom then I think what old & SV stated would be correct.

I think reversing hyd cylinder in this manner would lower loader fel lifting capacity due to lowering sq inch of cyl barrel oil capacity on pressure side when raising boom due to area rod occupies in lieu of oil.
 
If the loader will lift the rear wheels what more do you want? As for sag our loader has sagged since new. Both boom and bucket. I always figured it was in the valves and the poor machining that IHC has done for decades. The ripples on the faces of machined parts like the sides of the valves don't help the o-rings any. The 574 with the 2050 series A loader is what we have been using since new in 1972ish. It used to lift the rear wheels off the ground if loaded to full in the bucket. We have loaded tires with the terrible chloride, and 2 weights on the outside ,and a couple of old case weights on the inside. This is on each wheel. The weights are flush with the outside of the tire/rim and are out past the rim inside. I'm guessing about 1200 pounds to each wheel with all together. We can still lift a wheel off the ground with it. So now how much weight do you want on the rear. The 300U is approximately the same physical size as the 574 just less horse power in the engine on the 300.
 
Thank you for the diagnosis. Any Ides where I can order a rebuild kit for the cylinders? It's a Farm Hand F20-A single stage cylinders.
Thank you
 
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