Spectra High Pressure Tube Fitting Assembly
Use ONLY Dayco Imperial
Carefully fit and measure the tubing before cutting with a sharp razor knife or hose cutter and remove any burrs. Minimum tubing bend radius is 6”. Route tubing away from excessive heat sources and secure from vibration and chafe. Have at least one shallow bend in a tube assembly after it is installed.
Refer to figure 1. If a fitting has been dissembled, reassemble as illustrated. The notch on the ferrule must engage the inside of the nut properly for the nut to seat down fully. Once the tube is inserted the ferrule and nut will naturally align.
Refer to figure 2. Insert tube fully into the fitting, it should go in 0.9”. Tighten the nut finger tight while moving the tube around to prevent binding. One thread should be showing under the nut. Secure the tube so it won’t back out when tightening.
Refer to figure 3. Use 13/16” wrench to hold a straight body fitting or a 3/4” wrench for a 90º body, and a 7/8” wrench for the nut. Hold the body, recheck the tube insertion, then tighten the nut
Make Sure these fittings are tight on initial assembly or they will fail!
The correct Torque is specification is 85 foot pounds
Figure 1.
Figure 2.
Index mark | Straight thread | Straight or 90 deg. |
|
| 3/8" pipe thread |
NutFerruleBody
Nut finger tight with 1 thread showing
Cut tube square
Black high pressure tubing
Tighten |
|
nut) with a7/8" wrench after finger tight. |
|
Use index mark as guide | No threads showing |
Figure 3.
Insert tube 0.9" until it stops | IMPORTANT! |
| Hold fitting body with 13/16" |
| wrench when tightening |
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