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Hydraulic Question - What is this

J

Jim Hunter

Member
I have a AC-C with front loader. Not sure what this is but it is leaking. Top hose goes to hydraulic pump and selector valve, bottom hose and pipe go to selector valve and fluid reservoir. Is this some sort of pressure relief valve? The connection/nipple in front – can I use that for other hydraulic equipment?
a20123.jpg
 
Yep simple pressure relief valve. Safety for a high pressure system that the Allis tractors have and most loader parts will not handle the higher pressure they have so the relief valve is added. Most like set up to pop off around 2500psi give or take a few psi
 
Thanks Old - Would this still be a high pressure system – I have a Vickers hydraulic pump that is connected to where the crank handle would normally go
 
Even if it isn't a high pressure system, the pump will still need a pressure relief valve. That way when you reach the end of the cylinder stroke or if you overload the loader it won't damage the pump.
 
The nipple you refer to is not another hyd connection. Remove the cap and you will see the adjustable spring that sets the relief valve pressure. System is high pressure if the pump is the integral factory pump. Otherwise, put on a pressure gauge to check pressure.
 
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