How to Install SAE Fittings

Society of Automotive Engineers fittings come in a variety of sizes. These fittings also come in adjustable and non-adjustable versions. This means that the adjustable fittings can be turned or oriented in a specific direction, whereas the non-adjustable fittings are used where there is no specific direction or other alignment needed. SAE fittings which use O-rings offer superior seals to the older, standard metal-to-metal fittings. Since fittings must be tightened to such high torque ranges, the threads are more apt to distort and fail. Installing these fittings does require a process, but the quality of seal difference is well worth the effort.

Instructions

1

Examine the components of the fittings very closely, looking for any warping or other design faults. Thoroughly lubricate the non-adjustable O-ring and threads with the hydraulic system fluid and wait a few seconds before making the connection.

2




Torque wrenches are a sure way to gauge how tight the fitting is attached.

Start the non-adjustable fitting into its port, taking the time to start it exactly straight. Turn it until it is finger-tight. Finish tightening the fitting to its chart-specific torque setting with the torque wrench and torque chart.

3

Connect the adjustable fittings by following the first two steps plus these additional steps. Orient the fitting so that you are looking directly at the open end. This is the end from which it is possible to see the nut, the washer and the O-ring. Turn the nut of the fitting assembly as far to the right as you can. Turn it clockwise.

4




Male and female connector designs ensure the tightest fitting connections.

Turn the entire fitting assembly into its female connection or port until the washer comes into contact with the nearest wrench pad with a wrench. Reverse the turn on the fitting with the wrench and turn no more than one single complete turn. Turn it less if the fitting can be set in the position it needs to be set without less than a complete 360-degree revolution.

5

Position another wrench on the wrench pad of the fitting so that the fitting stays put without turning at all. Holding the wrench on the wrench pad, torque the nut to the exact value you find for that size nut on the torque chart.