ISO Flare

ISO Flare:

ISO flares are NOT to be used for rear brake pipe connections to the rear wheel cylinders.
1. Obtain recommended tubing and steel fitting nuts of correct size. Outside diameter of tubing is used to specify size.
2. Cut tubing to length. Correct length may be determined by measuring old brake pipe using string and adding 3 mm (.125 inch) for each ISO flare.
3. Cut end square and chamfer inside and outside diameter of tubing with de-burring tool. Remove all traces of lubricant from tubing.
4. ISO flare tubing ends using J 29803-A
a. Make sure fittings are installed on tubing before starting flare.
b. Clamp flaring tool body in vise.

Forming Mandrel And Forcing Screw:

c. Select correct size collet and forming mandrel for tube size used.
d. Insert proper forming mandrel into tool body. While holding mandrel in place with your finger, thread in forcing screw until it makes contact and begins to move forming mandrel. When contact is made, turn forcing screw back one complete turn.

Clamping Nut And Collet:

e. Slide clamping nut over tubing into correct collet. Leave approximately 19 mm (.750 inch) of tubing extending out collet Insert into tool body. Tube end must contact face of forming mandrel.
f. Tighten clamping nut into tool body very tight or tube may push out.
g. Wrench tighten forcing screw in until it bottoms. Do not tighten forcing screw further or flare may become over-sized.
h. Back clamping nut out of tool body and disassemble clamping nut and collet. Flare is now ready for use.
5. Bend new brake pipe to match old pipe using a tube bender. Minimum clearance of 19 mm (.750 inch) must be maintained from all moving components and 13 mm (0.5 inch) from all vibrating components, unless brake pipe is clipped to the component. For armor wrapped pipe, contact is permissible if there is no relative movement between pipe and contact surface.