Kubota U25-3 Repair Manual

U20-3, U25-3 WSM Hydraulic system (Service section)
IV-S-23
d. Traveling performance
U20-3 U25-3 Remarks
Manufacturer Fujikoshi KAYABA
Model
PHV-190-39-1 MAG-18V-230E
Capacity 1st/2nd cc/rev 16.1/8.4 18.0/10.0
Reduction ratio 1/39 1/42.96
Total displacement cc/rev 627.9/327.6 774/430
Rated oil flow L/min 23 27.6
Theoretical torque
1F
kg·m
N·m
220
2156
269.6
2,656
U25-3: at 21.6 MPa, 213 kgf/cm
2
2F
kg·m
N·m
N/A
149.8
1,476
Theoretical speed 1F/2F rpm 36.6/70.2 35.6/64.2 U25-3: at 27.6 L/min
Relief valve pressure
Mpa
kg/cm
2
21.6
213
21.6
213
Climbing ability deg. 30 30
Max. traction force
1F
KN
kgf
15.5
1580
20.3
2070
Slip 70% theoretical torque
Oil temp. : 50 ± 5 °C
2F
KN
kgf
8.1
826
9.7
990
Relief 60% theoretical torque
Traveling block performance mm/10min 300 300
10 min engine stop
Testing angle : 20deg
Traveling
speed
Rubber/Iron
1F km/h 2.2 2.5
2F km/h 4.2 4.5
10m traveling time
1F sec./10m 16/ 14/
R : Rubber shoe/
I : Iron shoe
2F sec./10m 8.6/ 8.0/
Straight travel performance 1,2F mm/10m 600 600
Drain amount at lock
1F L/min
2F L/min
Drain amount
while rotating
1F L/min
2F L/min
Hi-speed change pressure
1st → 2nd
MPa
kgf/cm
2
1.5
14.7
0.59
20.2
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Kubota U25-3 Specifications

General

Brand	Kubota
Model	U25-3
Category	Excavators
Language	English