That is correct - it must not go through.
But if you are getting zero pressure no way you are connected to the pump supply line There has to be some pressure coming from the pump else the loader and 3pt would be totally dead.
Dan
M4900 Hydraulic Problems. Power steering, PTO are OK. Everything else weak
- Thread starter wheelinag
- Start date
But if you are getting zero pressure no way you are connected to the pump supply line There has to be some pressure coming from the pump else the loader and 3pt would be totally dead.
Dan
I understand that which leads me to suspect the loader valve may be hooked up backwards. Lets do this:
Take the gauge off the hose and put the hose in a bucket. Start tractor and check for oil coming from the hose. My guess is there wont be any.
Dan
A continuous stream of oil?
You got no reading at all when the gaige was connected - not even a couple hundred PSI?
Dan
I cant see how the loader or 3pt can possibly work with zero pressure. Thats a 5000 PSI gauge so maybe its not registering really low pressure. What was engine RPM when you measured pressure?
Dan
The seat sits on top of the hydraulic cover. The relief vslve is item 50 in this parts diagram. Looks like all you can do is inspect and clean it.
Dan
Yes the calve can go bad or get jammed open by dirt/sludge. It will act just like a bad pump. Befire I replaced anything I would remove the relief and look for damage or a stuvk poppet. If that loojs good I would do a direct pressure test on the pump but that rewuires more than just your gsuge.
Dan
The threaded stud adjusts pressure but with zero pressure I would not ecpect much if any help. The range of that adjustment is probably a few hundred PSI.
If its the problem more likely its broken, leaking, or has something stuck under the seat. Take it out and inspect for damage or debris. Before doing any adjustment READ the WSM.
Dan
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Just look for anything obvious. Junk in the orifices, cracks, broken spring, etc. Its quick. easy, and costs nothing - READ the WSM and look at the illustrations.
Maybe you will get lucky. If not you are no worse off than you are now.
Dan