Kubota U25-3 Repair Manual

U20-3, U25-3 WSM Hydraulic system (Service section)
IV-S-20
b. Relief valve
(1) Rod (2) Bottom
(3) Spare (4) Arm
(5) Travel left (6) Travel right
(7) Bucket (8) Dozer
(9) Swing (10) Swivel
(11) Boom
[1] Relief valve (bench data)
dddde
a
(1)
(1)
(8) (9)
(3) (4) (6)
(6)
(10)
(1)
(1)
(2)
(2)
(2)
(7)
(11)
(2)
bc d e
No Location
a P3 main relief valve for
b Dozer overload relief valve
c Swing anti-void valve
d Overload relief valve
e P1-P2 main relief valve
No. Valve location Operating work Unit U20-3 U25-3 Remarks
1
P1
Main relief valve
Bucket crowd
MPa
kgf/cm
2
21.6
220
21.6
220
U20-3: at 29 L/min
U25-3: at 29 L/min
2
P2
Main relief valve
Arm crowd or
dump
MPa
kgf/cm
2
21.6
220
21.6
220
U20-3: at 29 L/min
U25-3: at 29 L/min
3
P3
Main relief valve
Swing Left or
Right
MPa
kgf/cm
2
20.6
210
17.2
175
U20-3: at 19 L/min
4
Pilot primary
pressure
All pilot lines
MPa
kgf/cm
2
3.9
40
3.9
40

Kubota U25-3 Specifications

General

Brand	Kubota
Model	U25-3
Category	Excavators
Language	English