Komatsu PC88MR-10 Shop Manual page 338

20 Standard value tables
Standard value table for machine
Pump performance
Item
Performance of
hydraulic pump
a Bring pump discharged pressure P
Avoid measuring the near turning point of the graph because the error increases there.
a When measuring with the pump mounted on the machine, if it is impossible to set the engine speed to the
specified speed by using the fuel control dial, take the pump discharged volume and the engine speed at
the time of measurement, and use them as a base for calculating the pump discharged volume at the
specified speed.
a Pump discharge Q in the graph indicates the discharge from one pump.
20-14
Machine model
Measurement condition
Pump speed (rpm): 1,850 rpm
PC-EPC current value (mA): 350 mA
Test pump discharged pressure (MPa {kg/
cm 2 })
: P
1
Other pump discharged pressure (MPa {kg/
cm 2 })
: P
2
Average discharged pressure (MPa {kg/
cm 2 })
: Pp = (P + P ) / 2
1 2
and P as close as possible to the average pressure when measuring.
1 2
PC88MR-10
Discharged
volume
Unit
Standard
value
Q
l/min
(See graph)
Discharged
volume
Repair limit
Q
(See graph)
PC88MR-10