Fabricate And Install Rigid Fluid Lines And Fittings. Flashcards
Of what material are most low-pressure rigid fluid lines made?
1100-1/2 hard or 3003-1/2 hard aluminum alloy tubing.
Is the size of a rigid fluid line determined by its inside or its outside diameter?
By it’s outside diameter.
When routing a fluid line parallel to an electrical wire bundle, which should be on top?
The electrical wire bundle should be on top.
How can you distinguish an AN fluid line from an AC fitting?
The AN fitting has a shoulder between the end of the flare cone and the first thread. The threads of an AC fitting extend all the way to the flare cone.
How tight should an MS flareless be tightened?
Tighten the fittings by hand until it is snug, and then turn it with a wrench for 1/6-turn to 1/3-turn. Never turn more than 1/3-turn with a wrench.
What damage can be caused by over tightening an MS flareless fitting?
Over tightening drives the cutting edge of the sleeve deep into the tube and weakens it.
What kind of rigid tubing can be flared with a double flare?
5052-O and 6061-T aluminum alloy tubing sizes from 1/8-inch to 3/8-inch OD.
Of what material should rigid fluid lines be made that carry high-pressure (3,000 psi or greater) hydraulic fluid?
Annealed or 1/4-hard corrosion-resistant steel.
What is the difference between the flare angle for aircraft and Automotive fittings?
Aircraft fittings have 37 degree flare angle and automotive fittings use 45 degrees.
What should be done to the end of a tube that is to be flared?
The cut end should be polished to remove any sharp edges that could cause the tubing the crack.
