Komatsu PC88MR-10 Shop Manual page 487

Hydraulic circuit
Machine model
Testing conditions
Item
Hydraulic oil temperature: 45 to
55°C
Control
Engine: High idle
circuit oil
Working mode: P mode
pressure
Auto-deceleration switch: OFF
Work equipment, swing, travel
control lever: All NEUTRAL
Hydraulic oil temperature: 45 to
Unload
55°C
pressure
Engine: High idle
(pump
Working mode: P mode
discharge
Auto-deceleration switch: OFF
pressure)
Work equipment, swing, travel
(*1)
control lever: All NEUTRAL
Hydraulic oil temperature: 45 to
Work
55°C
equipment
Engine: High idle
(arm) relief
Working mode: P mode
pressure
Work equipment control lever:
(*1)
Arm digging relief
Hydraulic oil temperature: 45 to
55°C
Disconnect connector (CN-V03)
Swing relief
of parking brake solenoid.
pressure
Engine: High idle
(*2)
Working mode: P mode
Work equipment control lever:
Swing relief
Hydraulic oil
temperature: 45 to
Travel relief
55°C
pressure
Engine: High idle
(*1)
Working mode: P
mode
Hydraulic oil temperature: 45 to
55°C
Engine: High idle
LS
Working mode: P mode
differential
Work equipment operation:
pressure
Bucket CURL full stroke, lever in
(*2)
NEUTRAL
LS differential pressure = Pump
pressure - LS pressure
PC88MR-10
Engine
R.H.
Travel
locked
Right
forward
or
reverse
relief
L.H.
Travel
locked
Left
forward
or
reverse
relief
PC88MR-10
SAA4D95LE-6
Standard
Unit
value for new
machine
2.7 to 3.7
MPa
{kg/cm 2 }
{28 to 38}
1.8 to 3.8
MPa
{kg/cm 2 }
{18 to 38}
25.52 to
MPa
27.48
{kg/cm 2 }
{260 to 280}
19.52 to
MPa
21.48
{kg/cm 2 }
{200 to 220}
25.52 to
27.48
{260 to 280}
MPa
{kg/cm 2 }
25.52 to
27.48
{260 to 280}
2.5 to 4.4
MPa
{kg/cm }
2
{25 to 45}
30 Testing and adjusting
Mea-
Repair limit
sured
item
2.7 to 3.7
{28 to 38}
1.8 to 3.8
{18 to 38}
25.03 to
27.97
{255 to 285}
19.03 to
21.97
{195 to 225}
25.03 to
27.97
{255 to 285}
25.03 to
27.97
{255 to 285}
2.1 to 2.3
{21.5 to 23.5}
Pm clinic
No
Go-
goo-
od
d
30-137