Komatsu F30791, Shop Manual

Page: 139 / 298

Machine model PC27R-8
Classifi-
cation
. Delivery piston pump P1
. Pump speed: 2600 rpm
. Hydraulic oil temperature: 45 ± 55ëC
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: MEASUREMENT
.
Engine speed: 2525 rpm
. Delivery: 42
,
/min
PROPORTIONAL DELIVERY AT 2600 rpm
(42x2600)/2525= 43.2
,
/min
20-23
PC20R-8 PC27R-8
Pump
characteristics
0 bar
75.4
ᐉ
/min
0 bar
70.2
ᐉ
/min
126.5 bar
67.1
ᐉ
/min
162.8 bar
49.8
ᐉ
/min
123.5 bar
75
ᐉ
/min
162.8 bar
56.3
ᐉ
/min
205.8 bar
43.3
ᐉ
/min
205.8 bar
36.9
ᐉ
/min
Input shaft torque (kgm)
0
25
75
100
Q (
ᐍ
/min)
98
(100)
196
(200)
49
(50)
147
(150)
P(bar)
(kg/cm
2 )
1
2
3
4
5
6
7
7
.
2
8
RKP04611
50