How tight do you tighten hydraulic fittings?
Once aligned, tighten the nut until it is “firm” against the washer and o-ring, with the nut becoming snug with a feel of metal-on-metal in less than one revolution. Over-tightening causes as many leaks as under-tightening.
What is O ring boss thread?
SAE Straight Thread O-ring or O-Ring Boss (ORB) is a multipurpose thread ideal for medium and high-pressure hydraulic applications. The male thread contains an o-ring at the base which mates with a chamfer machined into the female counterpoint, which makes this thread type ideal for non-leak applications.
How do you install an o-ring hydraulic fitting?
Lubricate the O-ring with a light coat of the system’s fluid or suitable lubricant. Install retaining ring over the O-ring (if included) and ensure O-ring is seated inside the retaining ring evenly. Screw and tighten the fitting or adapter into the port using suggested torque values.
How tight should O-ring fittings be?
O-ring fittings you want snug but do not over tighten. If you ever have a leak, chances are it was over tightened and crushed the o-ring. You can even tighten the fitting more, but it will leak again eventually. Right now I am working with a special torque wrench set just for hydraulic fittings.
How tight should an fittings be?
If you’re not sure which size you’re dealing with, check our AN Plumbing Fitting and Hose Size Guide….Tightening Method 1: Torque.
| AN Fitting Size | Aluminum Fittings | Steel Fittings |
|---|---|---|
| 4AN | 100-140 | 135-150 |
| 6AN | 150-195 | 270-300 |
| 8AN | 270-350 | 450-500 |
| 10AN | 360-430 | 650-700 |
How many turns past finger tight Should the fitting be tightened?
Don’t over-tighten joints by giving them “one more turn to be sure.”Do finger tighten plus one or two turns – No More. Don’t wrap Teflon tape or Teflon paste or pipe dope to add bulk to or to lubricate the joint.
Is O-ring boss pipe thread?
Unsourced material may be challenged and removed. An o-ring boss seal is a technique for joining two fluid-carrying pipes, hoses, or tubing. In an o-ring boss (abbreviated ORB) system, a male-threaded part is inserted into a female-threaded part, providing a mechanical seal.
What is a boss fitting?
A simple design for better leak protection. With its streamlined one-piece design, the B.O.S.S. Fitting® (bolted one-piece sure seal) reduces the seal point to a single gasket to greatly reduce chances for leakage.
Can you torque an O-ring?
O-Ring Face Seal Fittings: Torque—O-ring face seal fittings can, and should, be torqued to the recommended specifications. This is because the connection seal is made by an elastomeric seal against metal. The lack of metal-on-metal contact means that only the O-ring is being deformed in assembly and reassembly.
Can you over tighten an O-ring?
Over tightening the fitting will make the threads deform and yield which will cause them to lose adequate clamping force or load on the seating area. Severe conditions and over extending operation of the system can cause additional yielding, resulting in unwanted leak points.