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Jeremy R.
Jeremy R., Mechanic
Category: Agriculture and Farm Equipment
Satisfied Customers: 9020
Experience:  Field Service Tech
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I just put a new hydraulic pump on my l 4040 crane truck and

Customer Question

I just put a new hydraulic pump on my l 4040 crane truck and I can't get any pressure over500 lbs
Is there a pressure adjustment valve?
Submitted: 2 years ago.
Category: Agriculture and Farm Equipment
Expert:  Jeremy R. replied 2 years ago.
Hi there, I'm Jeremy I'm going to help you with your question.On the side of the pump itself there should be a screw that you can turn to raise and lower the pump output pressure.Some are flathead, some are allen. Have someone run a function and turn the screw while watching the gauge if you can do that whithout being in harms way. If not then do the adjustment and test afterwards little at a time go 1 turn each time to get it set.
Customer: replied 2 years ago.
No adjustment on pump
Expert:  Jeremy R. replied 2 years ago.
Then the only thing that will limit the pressure is the main relief valve on the hydraulic manifold