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Thanks Quicksand, I do have quick disconnects on the unit.
Will play with it next week.
Smokey
Ron, the hose from the pump pressure side is about a foot long and
goes to the diverter valve in front of the brake pedals. A hose
from the left side of the diverter valve goes to the loader control
valve. My gauge is installed right before it goes into the loader
control valve. Don't see a name on this valve, but has a single
handle on the top side. The loader control valve Grumpy
described in a previous post as a Cross SS series sounds like
the one I have. Our tractors are the same year and have the
same NT-700 loader. Don't know where relief valve is at.
I am going to try to re-plumb hoses and go from the pump
directly to the loader valve and see if that makes a difference.
If I still have 1300 psi, I may have a weak pump.
Will be next week before I can get to this. Are any of the
hose fittings metric? My closest source for metric fittings
is 150 mi.
Thanks, Smokey
Quicksand, by your description it looks like my hydraulic plumbing
is the same as yours. The valve you speak of with 5 hoses in front
of the right foot also has a plug in the end that points to your
right foot. I got brave and pulled this plug. There is a spring
under it with very little tension but I did not see any way to adjust
it. It may be possible to add some washers or spacer behind the
spring to add tension. Have not tried this yet but think i will.
I installed the pressure gauge late summer last year and the
system has always relieved at 1300 psi, and still does. Never
higher or lower. Neither the loader or the 3 point will pick the
tractor wheels off the ground as Tinbender stated. The pressure
is relieved at 1300 psi before that happens.
The tires are what came on the machine, still have molding tits,
and are inflated to pressures indicated on the tires and the
sticker on the dash. Don't believe tires are the issue.
Thanks for your imput guys. Smokey
Got the tractor warmed up today. There is no sound or hissing from
the loader control valve, hydraulic pump, or any other valve when
under load at the end of the cylinder. Loader function and 3 point
still relieves at 1300 psi.
I pulled the hydraulic filter. It was very clean and so is the oil.
The oil level is correct and I do not believe there is air present
in the system. Are there any other relief valves in the system?
My pressure gauge is mounted on the pressure hose right before
it enters the loader control valves. I suppose I could install the
gauge right behind the pump's pressure side to see what it is
putting out.
Thanks, Smokey
Thanks Quicksand. I would not suspect pump failure on a machine
with less than 200 hrs, but I suppose it is possible. I have not noticed
a hissing noise at the 1300 psi relief, but I am a little deaf with other
background noise. I will play with it, maybe have the wife (with good
ears) listen in. Will get back to you. Thanks, Smokey
Thanks for your post, Grumpy. I assume the Cross valve set you are
refering to is the loader control valve which actuates the loader boom
and bucket functions. Would this also affect the 3 pt hitch? My 3 pt
also reliefs at 1300 psi. but is not slow. My loader functions seem a little slow, especialy the bucket in the dump function. I have adjusted the adjustment knob below the seat per the book but no difference.
I am curious about the splitter valve which is the first valve from the
hydraulic pump on the pressure side. Is there a relief valve on this?
Looks like there is a plug of some kind on it. I have not got brave
enough to pull it out yet. Don't want to screw something up.
Hope someone can give me some feed back on this.
Thanks, Smokey
Thanks for your response guys. By “stall out” I mean 1300 psi is the
max. pressure indicated on the gauge when any hydraulic function or
control valve is engaged under load, or comes to the end of a hydraulic
cylinder. Makes no difference weather the engine is at idle or full speed. So it would be a relief valve by passing at 1300 psi.The engine does not stall or die.
The loader unit is a Nortrac NT-700 (Amerequip)?
Can the relief valve be adjusted, where is it located?
Thanks, Smokey
