Komatsu Galeo PC138US-8 Shop Manual page 322

SEN02457-01
Cate-
Item
gory
Leakage from travel
motor
Total work
equipment
(hydraulic drift at
tip of bucket
teeth)
Boom cylinder
(amount of
retraction of
cylinder)
Arm cylinder
(amount of
extension of
cylinder)
Bucket cylinder
(amount of
retraction of
cylinder)
Blade (hydraulic
drift at tip of
blade)
Boom
Bucket teeth in
contact with
ground
I I I I
O O O O
Cylinder fully
extended
Arm
Cylinder fully
retracted
I I I I
O O O O
Fully extended
Bucket
Cylinder fully
retracted
I I I I
O O O O
Fully extended
Blade
Blade in contact
with ground
I I I I
O O O O
Blade fully
raised
6
Applicable model
Test conditions
• Engine at high idle
• Hydraulic oil temperature:
• Lock shoes and relieve travel
circuit.
• For testing posture, see Work
equipment 1
• Place in above posture and test
extension or retraction of each
cylinder and downward
movement at tip of bucket teeth.
• Horizontal, flat ground
• Bucket: Rated load (450 kg)
• Levers at HOLD
• Engine stopped
• Hydraulic oil temperature:
• Start testing immediately after
setting.
• Test hydraulic drift every 5
minutes, and judge from results
for 15 minutes.
• Engine stopped
• Hydraulic oil temperature:
• Set blade at maximum lifting
height and test downward
movement at edge of blade for
15 minutes.
• For testing posture, see
Work equipment 2
• Engine at high idle
• Hydraulic oil temperature:
45 – 55°C
• For testing posture, see
Work equipment 3
• Engine at high idle
• Hydraulic oil temperature:
45 – 55°C
• For testing posture, see
Work equipment 4
• Engine at high idle
• Hydraulic oil temperature:
45 – 55°C
• For testing posture, see
Work equipment 5
• Engine at high idle
• Hydraulic oil temperature:
45 – 55°C
Standard value for
Unit
l/min
45 – 55°C
45 – 55°C
mm
45 – 55°C
(Until touching
(Until touching
(Until touching
sec.
20 Standard value table
PC138US-8
Service limit value
new machine
Max. 1.1
Max. 310
Max. 15
Max. 50
Max. 40
Max. 31
3.8 ± 0.3
(Until touching
cushion)
3.1 ± 0.3
3.2 ± 0.3
(Until touching
cushion)
2.7 ± 0.3
(Until touching
cushion)
2.9 ± 0.3
2.3 ± 0.2
1.2 ± 0.3
1.3 ± 0.3
PC138US, USLC-8
Max. 1.7
Max. 460
Max. 23
Max. 75
Max. 60
Max. 47
Max. 4.4
cushion)
Max. 4.2
Max. 4.0
cushion)
Max. 3.7
cushion)
Max. 3.7
Max. 2.9
Max. 2.5
Max. 2.5