Komatsu PC20R-8 Shop Manual page 137

Delivery piston pump P1
Classifi- .
cation
Pump speed: 2600 rpm
.
Hydraulic oil temperature: 45 ± 55ëC
.
60
50
40
30
20
10
0
H When measuring deliveries with the pumps mounted on the machine, it is difficult to use the accelerator
to count the precise number of revs needed for this test.
Make delivery measurements with the engine running at a speed close to the test speed and then make
a proportional calculation.
Example:
PC20R-8 PC27R-8
Machine model
91.8 bar
60 /min
91.8 bar
54.6 /min
138.8 bar
35.5 /min
49 98
(50) (100)
MEASUREMENT
Engine speed: 2525 rpm
.
,
Delivery: 42 /min
.
PROPORTIONAL DELIVERY AT 2600 rpm
(42x2600)/2525= 43.2
138.8 bar
41 /min
205.8 bar
23 /min
147
(150)
,
/min
PC20R-8
205.8 bar
28 /min
P(bar)
196
(200)
(kg/cm 2 )
RKP06610
20-21