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Sinoboom AB14EJ - Hydraulic Symbols

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HYDRAULIC SYSTEM
GTZZ14EJ&16EJ Maintenance Manual
67
© May 2023
1. Place the cylinder in an environment with stable am-
bient temperature.
2. Make the cylinder apply normal cylinder load to the
platform.
3. Measure drift at cylinder piston rod with a calibrated
dial indicator.
4. The maximum allowable drift for cylinders with dif-
ferent bores is shown in the table below. If the
measured value is less than the maximum allowable
drift, the cylinder is working normally. If the meas-
ured value is greater than the maximum allowable
drift, it indicates that the cylinder is not working nor-
mally. Contact qualified service technicians for in-
spection and repair.
Table 7-7 Maximum allowable drift for different
cylinder bore
Cylinder bore
diameter
(mm/in)
Maximum allowable drift
in 10 minutes
(mm/in)
63/2.48 0.96/0.037
80/3.15 0.63/0.025
100/3.94 0.39/0.015
125/4.92 0.23/0.009
160/6.30 0.14/0.006
180/7.09 0.13/0.005
200/7.87 0.10/0.0038
220/8.66 0.08/0.0030
NOTICE
The data is based on cylinder leakage of 6 drops per
minute. Since the hydraulic oil expands with heat and
contracts with cold, the test value of cylinder drift may
have a tolerance of 7/10000 for each temperature
change of 1.
7.8 HYDRAULIC SYMBOLS
Table 7-8
Symbols Description
Filter
Brake
Table 7-8 (Continued)
Symbols Description
Emergencypower unit
Hydraulic motor
Overflow valve
3-position 4-way
solenoid directional
valve
2-position 4-way
solenoid directional
valve
Pressure-gradient
control valve
Check valve
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002
MP
CHARGE
+
-
+
-
QF
SQ
+
-
Li
19.9977
8.4982
17.4787
14.7538
46.7096
14.7538
34.4087
28.5682
28.5682
34.3393
28.5682
46.7096
28.5682
46.7096
28.5682
16.0373
46.8000
32.0000
30.0000
16.0000
16.0000
1
1
2
2
A A
B B
更改文件号
处数
标记
标准化
日期
姚剑
银友国
刘奇志
2018.10.25
刘晓
电驱剪叉液压原理图
101048050002
1:1
101048050002

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