Barko Hydraulics 595ML - K170 Upper Valve Adjustments

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595 ML CRL (S)
800-00177
HYDRAULIC PRESSURE ADJUSTMENT CONTINUED...
Pilot
Filter
K170 UPPER VALVE ADJUSTMENTS
NOTE: The Pilot Filter must be removed and cleaned every 1000 hours.
Main Relief - 5000 PSI non-adjustable.
Pilot Relief - 450 PSI non-adjustable.
Port Reliefs for all boom and swing functions are non-adjustable.
Grapple functions are equipped with adjustable feed reducers.
Pressures to the grapple open and close functions should not exceed 2200 PSI.
Pressures to grapple rotate functions should not exceed 1500 PSI.
To adjust, install a gauge on the load sense test port located on the pump (see Pump Adjustments for location of
test port). Remove the acorn nut and loosen the jam nut (13 mm wrench). Using a 4 mm Allen wrench, turn the
adjustment screw out (counterclockwise) to lower the pressure or in (clockwise) to raise pressure.
Pilot Relief
(pressure reducing
valve)
Pilot
Supply
Port
Load
Sense
Pressure
Port
(PL)
Pump
Pressure
Gauge
Port
(PX)
K170 UPPER VALVE BANK
Counter
Pressure
Valve
Port Reliefs
(non-adjustable)
Feed
Reducers
(adjustable)
Outlet Cover
(with pressure
in)
Counter
Pressure
Valve
Feed
Reducers
(adjustable)
Rotate
Stick
Swing
O/C
Main
Inlet Cover
Port Reliefs
(non-adjustable)
Main Relief
(non-adjustable)
Main Relief
(non-adjustable)
A
B
A
B
A
B
A
B
A
B
A
B
A
B
Active Fill
Valve