Komatsu PC210-8, Руководство по ремонту

Страница: 517 / 1200

30 Testing and adjusting UEN00230-00
PC210, 230, 240-8
13
3. Hydraulic drift of work equipment
4. Hydraulic circuit
No. Check item
Checking condition
Unit
Standard
value for new
machine
Service limit
value
Mea-
sured
value
Goo
d
Bad
Fuel
control
dial
Work-
ing
mode
Checking posture, etc.
1
Hydraulic drift of
bucket tip
Engine stopped
Boom top horizontal
Arm cylinder retracted fully
Bucket loaded
mm/
15 min
Max. 600 Max. 900
No. Checked part
Checking condition
[1] [2] [3] [4] [5]
Good
Bad
600K 600K 600K 600K 60K
Fuel
control
dial
Work-
ing
mode
Left knob
switch
Operation of work
equipment
F pump
main
R pump
main
F pump
LS
R pump
LS
Control
1
Self pressure
reducing valve
MAX P
OFF
All lever in neutral — — — —
A
2
Main relief valve
(Low pressure)
Arm out relief
B B B B
—
3
Main relief valve
(Low pressure)
ON
C C C C
—
4 Unload valve
OFF
All levers in neutral
D1 D1 D2 D2
—
5 LS valve
Right track driven idle
Lever moved halfway
E1
—
E2
— —
Left track driven idle
Lever moved halfway
—
E1
—
E2
—
6
Swing motor
safety valve
Swing lock
Right swing relief
F F
— — —
Swing lock
Left swing relief
F F
— — —
7
Main relief valve
Travel motor
Safety valve
Travel junction
valve
Right travel lock
Right forward relief
G
— — — —
Right travel lock
Right reverse relief
G
— — — —
Left travel lock
Left forward relief
—
G
— — —
Left travel lock
Left reverse relief
—
G
— — —
S
tandar
d value
Checked oil pressure Unit Standard value for new machine Service limit value
A (Control circuit basic pressure)
MPa
{kg/cm 2 }
2.93 – 3.43 {30 – 35} 2.74 – 3.43 {28 – 35}
B (Work equipment relief pressure,
low)
33.8 – 35.8 {345 – 365} 33.3 – 36.8 {340 – 375}
C (Work equipment relief pressure,
high)
36.3 – 38.3 {370 – 380} 36.3 – 39.2 {370 – 400}
D (Unload pressure) D1 – D2 = 2.5 – 4.5 {26 – 46} D1 – D2 = 2.5 – 4.5 {26 – 46}
E (LS differential pressure) E1 – E2 = 1.7 – 1.9 {17 – 19} E1 – E2 = 1.7 – 1.9 {17 – 19}
F (Swing relief pressure) 28.8 – 31.8 {295 – 325} 28.4 – 32.3 {290 – 330}
G (Travel relief pressure) 36.7 – 39.7 {375 – 405} 36.8 – 40.2 {375 – 410}