Kubota U20-3 User Manual

U20-3, U25-3 WSM General
I-11
(4) Hose screw
(5) Joint bodies
Thread size
(piping screw)
Tightening torque
N·m
kgf·m
Wrench size
Union nut section Taper thread section
1/8”
7.8 ~ 11.8 N
·m
0.8 ~ 1.2 kgf
·m
14.71 ~ 19.61 N
·m
1.5 ~ 20 kgf
·m
17 mm
1/4”
24.5 ~ 29.4
2.5 ~ 3.0
36.3 ~ 44.1
3.7 ~ 4.5
19 mm
3/8”
49.0 ~ 53.9
5.0 ~ 5.5
49.0 ~ 68.6
5.0 ~ 7.0
22 mm
1/2”
58.8 ~ 63.7
6.0 ~ 6.5
83.4 ~ 88.3
8.5 ~ 9.0
27 mm
3/4”
117.7 ~ 127.5
12.0 ~ 13.0
127.5 ~ 147.1
13.0 ~ 15.0
36 mm
1”
137.3 ~ 147.1
14.0 ~ 15.0
147.1 ~ 166.7
15.0 ~ 17.0
41 mm
Thread size
(piping screw)
Tightening torque
N·m
kgf·m
Spanner size
(reference)
Remarks
Steel pipe (OD)
R (tapered thread) G (straight thread)
1/8”
19.6 ~ 29.4 N
·m
2.0 ~ 3.0 kgf
·m
—17 mm
When in steel
pipe is in use.
8 mm
1/4”
36.3 ~ 44.1
3.7 ~ 4.5
W/O-ring
Joint Torque
58.8 ~ 78.5
6 ~ 8
19 mm 12 mm
3/8”
39.2 ~ 49.0
4.0 ~ 5.0
W/O-ring
Joint Torque
78.5 ~ 98.1
8 ~ 10
23 mm 15 mm
1/2”
49.0 ~ 68.6
5.0 ~ 7.0
W/O-ring
Joint Torque
117.7 ~ 137.3
12 ~ 14
26 mm 16 mm
Metric Size Hose
Thread size
(piping screw)
To rq ue
N·m
kgf·m
M12
× 1.5
20 ~ 30
2.0 ~ 3.1
M14
× 1.5
20 ~ 30
2.0 ~ 3.1
M16
× 1.5
30 ~ 50
3.1 ~ 5.1
M18
× 1.5
30 ~ 50
3.1 ~ 5.1
M22
× 1.5
40 ~ 60
4.1 ~ 6.1

Kubota U20-3 Specifications

General

Brand	Kubota
Model	U20-3
Category	Excavators
Language	English