Komatsu PC20R-8 Shop Manual page 139

Delivery piston pump P1
Classifi- .
cation
Pump speed: 2600 rpm
.
Hydraulic oil temperature: 45 ± 55ëC
.
100
0 bar
75.4 /min
75
0 bar
70.2 /min
50
25
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
126.5 bar
67.1 /min
162.8 bar
49.8 /min
49 98
(50) (100)
MEASUREMENT
Engine speed: 2525 rpm
.
,
Delivery: 42 /min
.
PROPORTIONAL DELIVERY AT 2600 rpm
(42x2600)/2525= 43.2
123.5 bar
75 /min
162.8 bar
56.3 /min
205.8 bar
36.9 /min
147
(150)
,
/min
PC27R-8
8
7 2
.
7
6
205.8 bar
43.3 /min
5
4
3
2
1
196 P(bar)
(200)
(kg/cm 2 )
RKP04611
20-23