aturner
Well Known Member
OK, I don't want to make a mistake here.....the engine driven fuel pump on my IO-540 had two simple 90 degree fittings, so I am trading them out for the Van's supplied fittings. The outlet side is fine, this is the KB-090 with an O-ring, washer, and jamb nut. I tightened the nut to 23 ft. lbs. (right?), and everything feels secure and tight.
On the inlet side, the plans call for the KB-000, which apparently does not use a jam nut and washer, just an o-ring.
The problem is that the fitting insets into the pump with little resistance until the nut portion of the fitting contacts the fuel pump. I can tighten it, but this just doesn't feel right. Is the O-ring going to seal properly? Will the fitting not back out? Is this right?
On the inlet side, the plans call for the KB-000, which apparently does not use a jam nut and washer, just an o-ring.
The problem is that the fitting insets into the pump with little resistance until the nut portion of the fitting contacts the fuel pump. I can tighten it, but this just doesn't feel right. Is the O-ring going to seal properly? Will the fitting not back out? Is this right?