Komatsu ecot3 PC300LC-8 Shop Manual page 477

30 Testing and adjusting
* Gauge changing work: Change hoses of gauges [3] and [4].
No. Check item
Fuel
control
dial
8 Servo piston MAX
Checked oil pressure
H (Servo control pressure)
* Gauge changing work: Change [3] and [4] to 60K and change hoses of [3], [4], and [5].
No. Check item
Fuel
control
dial
MIN
PC-EPC (F)
valve
9
PC-EPC (R)
valve
MAX
10 LS-EPC valve
Checked oil pressure
J1 (PC-EPC valve output pressure 1)
J2 (PC-EPC valve output pressure 2)
J3 (PC-EPC valve output pressure 3)
J4 (PC-EPC valve output pressure 4)
J5 (PC-EPC valve output pressure 5)
K1 (LS-EPC valve output pressure 1)
K2 (LS-EPC valve output pressure 2)
K3 (LS-EPC valve output pressure 3)
PC300, 350-8
Checking condition
Work-
Left knob Operation of work
ing
switch equipment
mode
P OFF Arm out relief
Unit Standard value for new machine
—
Checking condition
Work-
Left knob Operation of work
ing
switch equipment
mode
P
E All levers in neutral
L
OFF
B
Travel speed: Lo
travel lever in neutral
Travel speed: Mi
Travel lever oper-
P
ated
Travel speed: Hi
Travel lever oper-
ated
Unit Standard value for new machine
MPa
2
{kg/cm }
[1] [2] [3a]
60 MPa 60 MPa 60 MPa
{600 kg/ {600 kg/ {600 kg/
2 2 2
cm } cm } cm }
F pump R pump F pump
main main servo
H1 H1 H2
H1 : H2 = 1 : 0.6
(Oil pressure ratio)
[1] [2] [3b]
60 MPa 60 MPa 6 MPa
{600 kg/ {600 kg/ {60 kg/
2 2 2
cm } cm } cm }
F pump R pump F pump
main main (F)
J1
— —
J2
— —
J3
— —
J4
— —
J5
— —
— — —
— — —
— — —
Approx. 1.1 {Approx. 11}
Approx. 0.3 {Approx. 3}
Approx. 0.7 {Approx. 7}
Approx. 1.1 {Approx. 11}
Approx. 0.9 {Approx. 9}
Approx. 2.1 {Approx. 21}
Approx. 2.3 {Approx. 23}
0 {0}
SEN02663-02
[4a] [5]
60 MPa 6 MPa
{600 kg/ {60 kg/
2 2
cm } cm }
R pump
Control
servo
H2
—
Service limit value
[4b] [5a]
6 MPa 6 MPa
{60 kg/ {60 kg/
2 2
cm } cm }
R pump
LS-EPC
(R)
J1
—
J2
—
J3
—
J4
—
J5
—
K1
—
K2
—
K3
—
Service limit value
13