Komatsu PC130-7, Shop Manual, Page: 10 / 342

20-4
PC130-7
TESTING AND ADJUSTING
Model name PC130-7
Cate-
gory
Item Measurement condition Unit Standard value Permissible value
Oi
l p
res
su
re
Unload pressure
• Hydraulic oil temperature: 45 – 55 °C
• Engine speed: High idling
• Working mode: A
• Pump outlet pressure when all levers
are in neutral
MPa
{kg/cm
2
}
2.9 ± 0.5
{30 ± 5}
2.9 ± 0.5
{30 ± 5}
Boom relief pressure
• Hydraulic oil tempera-
ture: 45 – 55 °C
• Engine speed:
High idling
• Working mode: A
• Pump outlet pressure
when measured circuit is
relieved
At normal
relief
MPa
{kg/cm 2 }
31.9
{325 }
33.3 – 36.8
{340 – 375}
At power
max.
34.8 ± 1.0
{355 ± 10}
36.3 – 39.2
{370 – 400}
Arm relief pressure
At normal
relief
31.9
{325 }
33.3 – 36.8
{340 – 375}
At power
max.
34.8 ± 1.0
{355 ± 10}
36.3 – 39.2
{370 – 400}
Bucket relief pressure
At normal
relief
31.9
{325 }
33.3 – 36.8
{340 – 375}
At power
max. 34.8 ± 1.0
{355 ± 10}
36.3 – 39.2
{370 – 400}
Swing relief pressure
28.9 ± 1.5
{295 ± 15}
28.9 – 32.9
{295– 335}
Travel relief pressure
34.8 ± 1.0
{355 ± 10}
36.3 – 39.2
{370 – 400}
Control circuit basic
pressure
• Hydraulic oil temperature: 45 – 55 °C
• Engine speed: High idling
• Outlet pressure of self-reducing pres-
sure valve when all levers are in neu-
tral
MPa
{kg/cm 2 }
3.23 ± 0.2
{33 ± 2}
2.84 – 3.43
{29 – 35}
LS differential pres-
sure
• Hydraulic oil temperature:
45 – 55 °C
• Engine speed: High idling
• Working mode: A
• Pump pressure - LS pres-
sure
When all
levers are
in neutral
MPa
{kg/cm 2 }
2.7
{28 }
2.7
{28 }
When
travel sys-
tem runs
idle at Hi
2.2 ± 0.1
{22.5 ± 1}
2.2 ± 0.1
{22.5 ± 1}
+ 2.0
0
+ 20
0
+ 2.0
0
+ 20
0
+ 2.0
0
+ 20
0
+ 1.0
– 0.7
+ 10
– 7
+ 1.0
– 0.7
+ 10
– 7
(1)
STANDARD VALUE TABLE FOR CHASSIS