Komatsu ecot3 PC300-8, Shop Manual

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SEN02624-03 20 Standard value table
4
PC300, 350-8
Applicable model
PC300, 300LC-8
PC350, 350LC-8
Cate-
gory
Item Measurement condition Unit
Standard value for
new machine
Judgement
criteria
Hydrau
lic pressure
Unload pres-
sure
• Hydraulic oil temperature: Within
operating range
• Engine at high idle
• Working mode: P mode
• Hydraulic pump output pressure with all
control levers in NEUTRAL position
MPa
{kg/cm
2
}
3.9 ± 1.0
{40 ± 10}
3.9 ± 1.0
{40 ± 10}
Boom relief
Raise
MPa
{kg/cm
2
}
34.81(+1.47/–0.98)
{355(+15/–10)}
33.34 – 37.23
{340 – 375}
*37.26(+1.47/–0.98)
{380(+15/–10)}
*35.80 – 39.23
{365 – 400}
Lower (at low
pressure setting) 18.13 ± 0.98
{185 ± 10}
16.66 – 19.6
{170 – 200}
Lower (at high
pressure setting) 31.36 ± 1.47
{320 ± 15}
29.4 – 33.32
{300 – 340}
Arm relief
• Hydraulic oil temperature: Within
operating range
• Engine at high idle
• Working mode: P mode
• Hydraulic pump output pressure with all
measurement circuits relieved
• Values marked *:
Hydraulic oil pressure with power max.
switch in ON (reference only)
34.81(+1.47/–0.98)
{355(+15/–10)}
33.34 – 37.23
{340 – 375}
Bucket relief
*37.26(+1.47/–0.98)
{380(+15/–10)}
*35.80 – 39.23
{365 – 400}
Swing relief
30.87(+1.47/–2.45)
{315(+15/–25)}
28.42 – 32.85
{285 – 335}
Travel relief
37.27(+2.94/–0.98)
{380(+30/–10)}
35.80 – 40.70
{365 – 415}
Control circuit
source pres-
sure
• Hydraulic oil temperature: Within
operating range
• Engine at high idle
• Self pressure reducing valve output
pressure with all control levers in
NEUTRAL position
MPa
{kg/cm
2
}
3.23 ± 0.2
{33 ± 2}
2.84 – 3.43
{29 – 35}
LS differential
pressure
• Hydraulic oil
temperature: Within
operating range
• Engine at high idle
• Working mode: P mode
• Traveling speed: Hi
• Hydraulic oil pump
pressure – LS pressure
When all control
levers in NEU-
TRAL position
MPa
{kg/cm
2
}
3.9 ± 1.0
{40 ± 10}
3.9 ± 1.0
{40 ± 10}
When traveling
at half stroke MPa
{kg/cm
2
}
2.45 ± 0.1
{25 ± 1}
2.45 ± 0.1
{25 ± 1}
PPC valve out-
put pressure
• Hydraulic oil temperature: Within
operating range
• Engine at high idle
• Control lever in full stroke
MPa
{kg/cm
2
}
2.9(+0.6/–0.2)
{30(+5.5/–1.5)}
2.9(+0.6/–0.2)
{30(+5.5/–1.5)}