Checking Pcor Setting On A Test Stand; Adjusting The Pcor Setting - Danfoss 51 Series Service Manual

Electrohydraulic controls

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Series 51 Electrohydraulic Proportional Controls Service Manual

An alternate method to slowly increase the system pressure is to use the pump's pressure limiter (PL)

valve. Lower the PL setting below the PCOR setting. Stroke the pump to about one-fourth

displacement. Raise the PL setting slowly to increase system pressure until pressure at the M3 port

drops down. System pressure at this point is the PCOR setting. Adjust the PL back to its proper setting

after checking the PCOR setting.

6. Increase system pressure until pressure at port M3 drops down, system pressure at this point is the

PCOR setting.

Checking PCOR Setting on a Test Stand

Increase system pressure until the system flow begins to increase. System pressure at this point is the

PCOR setting.

Warning

System pressure may increase rapidly when flow increases.

For PCOR valves mounted on a Multiblock; use a 1-1/16 in. wrench to loosen the lock nut on the

adjusting screw. Using a large screw driver or a 13 mm wrench turn the adjusting screw clockwise to

increase pressure setting or counter clockwise to lower pressure setting. One turn of the adjusting

screw changes the setting approximately 69 bar [1000 psi].

11009448 • Rev BA • July 2014

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