U20-3, U25-3 WSM Hydraulic system (Service section)
IV-S-24
e. Cylinder
[1] Speed
[2] Natural fall
Unit
U20-3 U25-3
Remarks
(A) (B) (A) (B)
Boom cylinder Up
Canopy sec. 2.5~3.1 3.7 2.1~2.7 3.2
GL to Max. height
(exclude cushion time)
Cabin sec. 2.1~2.7 3.2 2.1~2.7 3.2
Boom cylinder Down
Canopy sec. 2.6~3.2 3.8 2.4~3.0 3.6
Max. height to GL
Cabin sec. 2.2~2.8 3.3 2.3~2.9 3.5
Boom cylinder cushion sec. 0.4~1.3 1.6 0.4~1.3 1.6
Arm cylinder Crowd sec. 2.3~2.9 3.5 2.2~2.8 3.4
Cylinder full stroke
Arm cylinder Dump sec. 2.4~3.0 3.6 2.4~3.0 3.6
Bucket cylinder Crowd sec. 2.9~3.5 4.2 2.7~3.3 4.0
Cylinder full stroke
Bucket cylinder Dump sec. 1.8~2.4 2.9 1.8~2.4 2.9
Swing cylinder Left
Canopy sec. 4.8~5.8 7.0 4.1~5.1 6.1
Cylinder full stroke
Cabin sec. 4.8~5.8 7.0 4.1~5.1 6.1
Swing cylinder Right
Canopy sec. 4.6~5.6 6.7 4.6~5.6 6.7
Cabin sec. 4.6~5.6 6.7 4.6~5.6 6.7
Dozer cylinder Up sec. 2.3~2.9 3.5 2.0~2.6 3.1
Cylinder full stroke
Dozer cylinder Down sec. 3.0~3.6 4.4 2.3~2.9 3.5
(A) New machine reference value
(B) Allowable limit
Unit
U20-3 U25-3
Remarks
(A) (B) (A) (B)
Load weight kg 146 167
2
includ bucket weight
Boom cylinder mm 20 100 20 100
Boom raise, Arm extend, Bucket
crowd, Bucket load : heaped capacity
10 min Engine stop
Arm cylinder mm 11 55 11 55
Bucket cylinder mm 10 50 10 50
Dozer cylinder mm 20 100 20 100 Arm vertical
Oil temp. : 50 ± 5 °C, 10 minutes (A) New machine reference value
(B) Allowable limit
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