Service Recommendations for O-Ring Boss Fittings

Straight Fitting

1. Inspect O-ring boss seat for dirt or defects.

2. Lubricate O-ring with petroleum jelly. Place electrical tape over threads to protect O-ring. Slide O-ring over tape and into O-ring groove of fitting. Remove tape.

3. Tighten fitting to torque value shown on chart.

T6243AE

04T,90,K66 -19-19MAR96-1/2

Angle Fitting

1. Back-off lock nut (A) and back-up washer (B) completely to head-end (C) of fitting.

2. Turn fitting into threaded boss until back-up washer contacts face of boss.

3. Turn fitting head-end counterclockwise to proper index (maximum of one turn).

NOTE: Do not allow hoses to twist when tightening fittings.

4. Hold fitting head-end with a wrench and tighten lock nut and back-up washer to proper torque value.

STRAIGHT FITTING OR SPECIAL NUT TORQUE CHART
Thread Size N·m lb-ft
3/8-24 UNF 8 6
7/16-20 UNF 12 9
1/2-20 UNF 16 12
9/16-18 UNF 24 18
3/4-16 UNF 46 34
7/8-14 UNF 62 46
1-1/16-12 UN 102 75
1-3/16-12 UN 122 90
1-5/16-12 UN 142 105
1-5/8-12 UN 190 140
1-7/8-12 UN 217 160

 
T6520AB

04T,90,K66 -19-19MAR96-2/2