1969 Mustang Fastback w/ Detroit Speed suspension

[Musclerodz]

that rack is not machined for teflon washer. requires o-ring and should not require sealant

[jeff71]

Originally Posted by Musclerodz

that rack is not machined for teflon washer. requires o-ring and should not require sealant

Thanks! DSE never said try a O-ring I took it upon myself to give it a shot. And......woke up this morning to a small amount on the garage floor. It's not the best pic but you can see how the O-ring has torn some. I made sure the O-ring was wet with oil and it still damaged it.........ugh.

[dhutton]

There should be a washer between the fitting and o-ring as far as I know.

Google 9/16-18 ORB and you will see fittings with washers.

Don

[Jim Hoke]

Hey - Just thought I'd chime in on this one. I work for Parker Hannifin, and we make fittings by the ton. The second picture you posted shows a lot of damage around the base of the fitting. Can you take a pic of the female port WITHOUT the fitting in it? There should be a chamfer or countersink at the mouth of the female port - which accepts the o-ring. Either that port is buggered up, or the o-ring is too large in cross section - which will make it bunch up as it runs out of room while being installed. Hope this helps a bit.
Jim

PS. Actually just went back a page and saw the additional pics and comments...… We are getting closer!
#1. Measure from the shoulder / hex of the fitting to the end of the thread - you are trying to determine how deep that fitting will screw into the female port
#2. Now measure from the face of the female port down to where the fitting would bottom out...…. Don't measure to the center of the female port - as it looks like it is deeper there due to a drill point. You need to see what the
shallowest dimension is - out near the outer wall of the female port
#3. How do things compare? Is the male thread too long when compared to the depth of the female port? If so - it won't allow enough compression of the o-ring.
#4. To me - the chamfered edge of the female port looks poorly machined - I am seeing sharp metal there - which can cut that o-ring
#5. Have DSE tell you what that female port is supposed to be...… If it is a 9/16-18 SAE port - that is a standard design that everyone should be machining too. You cn then determine the proper O-ring size for the male fitting.
Using a washer to seal that joint really seems wrong to me. The chamfer at the mouth of the female port is there to accept an O-ring. DSE should know that.

[EVIL SS]

Originally Posted by jeff71

I went and bought another fitting today that uses a fairly fat O-ring, I'm gonna try that today.

I'm getting conflicting info about what material should be used, how tight it should be and weather or not to use high pressure hydraulic thread sealant (Loctite 545).

I think the rack is made for an ORB fitting but, the Stat o seals work too. Parker makes them(and others). The crush of the washer and seal of the rubber is good. If it is steering fluid, I would use a Viton o-ring material. It is strong enough for some real harsh chemicals.

[Musclerodz]

I know its suppose to be a dse rack, but I just looked at your pic again. Are you sure it doesn't use this style fitting?

[jeff71]

Originally Posted by Musclerodz

I know its suppose to be a dse rack, but I just looked at your pic again. Are you sure it doesn't use this style fitting?

Yeah, I asked about that. They said nope it’s the.....ORB?

I think I got it licked now! I went to a hydraulic shop and he had a better rubber O-ring and it seems to have worked. I put a few miles on it today and all seems good!

[andrewb70]

Looks like you need a washer between the fitting and the o-ring and the o-ring should have a thinner cross section...

Andrew

[jeff71]

Wow does time fly! It’s been a year I’ve been on the road with it and the best way to describe the experience is ........ Love, Hate.

Just to catch up I have somewhere around 1400 miles logged, two Speed SF autocross events and did a AFR head upgrade.

[camcojb]

That's awesome! Very cool to be out enjoying the car.