2 - 3
Hydraulic Pumps
Variable Flow
Type Variable Displacement
Reference A10VO - 978753
Mounting Gearbox
Load Sense Pressure (in neutral position) Maximum permitted - 5 bar; 72.5 lbf/in
2
Load sense pressure relief Valve (if fitted) 230 bar; 3335 lbf/in
2
Stand-by Pressure 20 bar; 290 lbf/in
2
Maximum Hydraulic Stall Pressure
460001 to 472554 without relief valve 232 bar; 3364 lbf/in
2
460001 to 472554 with relief valve and all from 472555 270 bar; 3915 lbf/in
2
Maximum Displacement 74cc/rev; 4.5 in
3
/rev
Flow at 2200 rev/min and 2500 lb/in
2
pressure †
- minimumum acceptable flow rate (new or rebuilt pump) 75 -80 litres/min; 16.5 - 17.6 UK gal/min
- minimumum acceptable flow rate (used pump) 70 - 75 litres/min; 15.4 - 16.5 UK gal/min
Flow in the Load Sense Line at 2200 rev/min (no pressure) 1 - 5 litres/min; 0.22 - 1.1 UK gal/min
Weight TBAkg (TBA lbs)
† Note: It is not possible to test full pump flow at system pressure, figures quoted give a ‘snapshot’ indication of pump
performance. For more detail refer to Service Procedures, Variable Flow Pumps - Flow and Pressure Testing.
Section E
Hydraulics
9803/3280
Section E
2 - 3
Issue 2*
Technical Data
*
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