Post by account_disabled on Dec 21, 2017 6:04:18 GMT -5
Hello everyone.
I have a hydraulic problem on a JCB 212 S back hoe. When using hydraulic levers hydraulics initially work then stop completely. If operator slowly opens hydraulic levers it works but when opened fully it completely stops.
Original thought was maybe pressure relief problem but I see all spools in there respective control valves have their own relief valves and since all functions have the problem I ruled that out. I want to check pump pressure.
Can anyone tell me where to check pump pressure?
Pump has pressure line going to what appears to be a priority valve. This valve feeds all the control valves and the steering circuit which is separate and works fine.
Do I check main pump pressure there?
Suction hose from reservoir is about 3" wide and I am assuming it has a suction screen?
I will check the hose and screen as well. I have no hydraulic schematic or repair manual so I am digging a little blindly.
Please help.
Thanks!
I didn't find the right solution from the Internet.
References: www.heavyequipmentforums.com/threads/jcb-212s-hydraulic-issue.50102/
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I have a hydraulic problem on a JCB 212 S back hoe. When using hydraulic levers hydraulics initially work then stop completely. If operator slowly opens hydraulic levers it works but when opened fully it completely stops.
Original thought was maybe pressure relief problem but I see all spools in there respective control valves have their own relief valves and since all functions have the problem I ruled that out. I want to check pump pressure.
Can anyone tell me where to check pump pressure?
Pump has pressure line going to what appears to be a priority valve. This valve feeds all the control valves and the steering circuit which is separate and works fine.
Do I check main pump pressure there?
Suction hose from reservoir is about 3" wide and I am assuming it has a suction screen?
I will check the hose and screen as well. I have no hydraulic schematic or repair manual so I am digging a little blindly.
Please help.
Thanks!
I didn't find the right solution from the Internet.
References: www.heavyequipmentforums.com/threads/jcb-212s-hydraulic-issue.50102/
Web Animation Promotion