Series 90 Axial Piston Pumps Technical Information Features and options FILTRATION OPTIONS
Suction filtration – option S The suction filter is placed in the circuit between the reservoir and the inlet to the charge pump, as shown below.
Suction filtration
The use of a filter contamination monitor is recommended.
Charge pressure filtration – option R, T, P, and L The pressure filter can be mounted Charge pressure filtration Screen directly on the pump or mounted remotely for ease of servicing. A 100Hydraulic fluid reservoir 125 µm mesh screen, located in the reservoir or the charge inlet line, is recommended when using charge Charge pump pressure filtration. This system requires a filter capable of withstanding charge Filter To low pressure. pressure
Adjustable charge pressure relief valve
To pump case
side and control
DISPLACEMENT LIMITER
All Series 90 pumps are designed with optional mechanical displacement (stroke) limiters.
P102 004E
Displacement limiter Displacement limiter adjustment screw
The maximum displacement of the pump can be set independently for forward and reverse using the two adjustment screws.
Servo piston
Servo cylinder P102 005E
Displacement limiter location Pump rotation
Right
Displacement limiter mounted
Displacement limitation at high
on servo side 1 2
pressure side A B
Left
16
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520L0603 • Rev FB • July 2007
1
B
2
A
