Typically proportional hydraulic fans have a “fail full on” logic in the design. This means that if the power is cut to the proportional control valve, it will default to full fan speed. If you can find the proportional valve that controls the fan, unplug the electrical connector and see if...
I have to be upfront and tell you that I have no experience on the RK tractors, however I do have experience on hydrostatic transmissions. So I will try and work through some traditional troubleshooting techniques.
So here we go...
Is this something that just started happening or has it been...
I have been unavailable for a while, so I am trying to get caught back up here. :)
I saw a couple of posts regarding the displacement of an 18 Series. The answer is 2.3 cu in or 37.7cc. If you are running this pump at 2000 RPM you would have a theoretical flow of 19.78 GPM.
A few other...
Here is what I found on the JD website- Item#30, P/N SJ290467. It's description just says "Kit" but in the comments it states "Relief Valve Sub Assembly". Hope this helps.
JD Parts Catalog
The noise you are hearing is caused by high system pressure. There is something that is loading the hydraulic motor in the transmission. It is either the motor itself, something mechanical in the gear transmission/final drive or the brakes.
The next question is why is there high system...
oldnslo, here are my responses...
1. There are two trunion shafts on this pump, so theoretically if you rotate one and see the opposite side rotate, then you can rule out the pins being displaced.
2. This pump has high pressure relief valves so it is safe to run it in a "dead head"...
It would be helpful if you could take a picture of the other 2 pumps so that we can identify what they are which will help us figure out what each one of them are doing.
My assumption is that you have this architecture on this machine:
1. One open circuit pump that controls the cylinder...
So there is only 2 possible explanations to what you have happening.
1. The pins (12) that attach the shaft (6) to the swashplate (11) have either sheard off or fallen out. This would cause the swashplate to remain in a neutral position, even though you are rotating the shaft.
2. There is a...
There are two scenarios that I attempted to show in my attached pictures. The first one is that your gauge is on the "low side" of the loop and stroking the pump will result in a slight decrease in charge pressure. The second is that your gauge is on the "high side" of the loop and that will...
Thanks for the pictures, that helps tremendously!
I have looked at your pictures and have marked up the picture to show the case drain versus the charge pump inlet. The check valve that you showed is on the case drain, which makes more sense.
In the picture you show a gauge port. Where the...
Would you mind double checking based on this diagram?
If it is on the charge pump inlet, I can’t think of any reason why it would be there. It would only lead to more pressure drop that makes it more difficult to get oil into the inlet of the charge pump.
The only place that a check...
Here are a couple of options for you:
Northern Tool
Discount Hydraulics
I would go with a 0-600 psi gauge for charge pressure. That would work for measuring it on your propel system as well. You can have a test hose made up at a local NAPA or you can even just buy one online at Discount...