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Appendix A – Hydraulics
Adapter Size Identification Chart
JIC
Size
Thread
-04
7/16-20
-06
9/16-18
-08
3/4-16
-10
7/8-14
-12
1 1/16-12
-16
1 5/16-12
-20
1 5/8-12
Proper tightening techniques
Using proper tightening techniques is important to keep the environment clean and prevent
costly repairs and maintenance on hydraulic equipment. Here,
torque-how-making-the-right-choice-keeps-your-hydraulic-fitting-connections-leak-free, you will
find valuable information on proper installation and tightening of adapters. Here,
http://blog.parker.com/10-things-not-to-do-when-your-hydraulic-fitting-leaks, is additional
information on how to prevent leaks.
Key points for working on hydraulic systems
1. Do not use Teflon Tape on hydraulic systems. The tape can break free and move
through the system and get caught in valve spools and pumps causing damage.
2. Use two wrenches when tightening adapters and hoses. One wrench holds the hose or
adapter and the other tightens the nut.
3. LOTO – Lock Out Tag Out. Hydraulic systems are dangerous to work on and proper
training should be obtained before maintaining or modifying any connections.
Preventing someone from operating while working on the system is imperative.
4. Hydraulic fluid under pressure can kill. Know what you are doing and read the
manufacturer's manuals completely.
WWW.SCALEANDCONTROL.COM
JIC
ORS
ORS
Wrench
Thread
Wrench
9/16
9/16-18
11/16
11/16
11/16-16
13/16
7/8
13/16-16
15/16
1
1-14
1 1/4
1 1/4
1 3/16-12
1 3/8
1 1/2
1 7/16-12
1 5/8
2
1 11/16-12
1 7/8
WLS350 Series Load Weighing System Manual
Pipe
Pipe
Thread
Wrench
1/4-18
11/16
3/8-18
7/8
1/2-14
1
3/4-14
1 1/4
1-11 1/2
1 1/2
1 1/4-11 1/2
1 7/8
http://blog.parker.com/turn-vs-
ORB
ORB
Thread
Wrench
7/16-20
9/16
9/16-18
11/16
3/4-16
7/8
7/8-14
1
1 1/16-12
1 1/4
1 5/16-12
1 1/2
1 5/8-12
2
9
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