Injector Return Line Fittings

[Jestertac]

My local hydraulic shop can't seem to get the proper (T) fittings and 90 elbows to replace the injector drip line hardware. They told me the fittings were 7/16 x 24 and they don't carry any for DOT airline. I took some of them off to get the proper sizing and crushed them in the process--so cannot reuse them. From looking at the pictures in the sticky, I think they were mistaken on their measurements, but They are closed until Monday so I was hoping for an off the top of the head correction. The online picture shows the hole in the top of the injector as 1/8th inch so I don't know why they can't get me another T fitting that the male DOT airline fittings will screw in to. If I have to, I can go back to the stock line by using the HD flare listed in the sticky, but I saw another thread where the OP stated most of his flares were badly sized. I would prefer to use DOT airline since the rest is done that way and also avoid getting a bad batch of flare fittings.

Any help would be really appreciated, I've spent hours searching the forums and online. Unfortunately I can't find part numbers or specifications to duplicate some of the work I have seen.

Thanks a billion guys. I'm looking for the injector pump oil lines and fitting also if you happen to know what those specs are. I could use crimped hydraulic lines or JIC if available for the oil lines.

 

[rustystud]

My local hydraulic shop can't seem to get the proper (T) fittings and 90 elbows to replace the injector drip line hardware. They told me the fittings were 7/16 x 24 NPT and they don't carry any for DOT airline. I took some of them off to get the proper sizing and crushed them in the process--so cannot reuse them. From looking at the pictures in the sticky, I think they were mistaken on their measurements, but They are closed until Monday so I was hoping for an off the top of the head correction. The online picture shows the hole in the top of the injector as 1/8th inch so I don't know why they can't get me another T fitting that the male DOT airline fittings will screw in to.

Any help would be really appreciated, I've spent hours searching the forums and online. Unfortunately I can't find part numbers or specifications to duplicate some of the work I have seen.

Thanks a billion guys. I'm looking for the injector pump oil lines and fitting also if you happen to know what those specs are. I could use crimped hydraulic lines or JIC if available for the oil lines.

Your referring to the fuel return lines ? The factory "crush" sleeves can be bought from any "Parker" hydraulics store. I had a thread a few years ago telling about them. Sorry I cannot remember where it is now. It should be under "injection fuel return lines" though.

 

[Jestertac]

Yeah I saw your post with the part numbers (Parker Hannifin 3501E). Unfortunately the person at the hydraulic shop was new. She couldn't find the parts in the Parker Hannifin book that I needed. I think my ignorance about threads in general and her newness contributed to the end result...

Specifically I was looking for new T fittings (and 90's) to screw into the injectors (and Injector Pump) so I could use DOT airline instead of the original fuel tubing. Frustrating stuff, I don't think she understood that even though I explained several times. Thanks Rusty, I'll head back there on Monday morning for round two.

 

[gimpyrobb]

First off, none of the fittings NEED changed to use dot air line.

Second, i may have some of the fittings for the injectors. Pm me a list of what you need and an addy.

 

[frank8003]

View attachment return lines fuel injector fittings 3501E-G.pdf

 

[cattlerepairman]

Regular plumbing crush sleeves from the hardware store work for me, using DOT air line; the sleeve needs to be held flat to the bench grinder for a second on either side because otherwise the sleeve is a tad to wide for the threads of the nut to engage.

As for the IP oil lines: I took the old ones to a competent heavy truck/hydraulic shop and they simply made new lines, re-using one fitting (I think the swivel one) and replacing the other.

 

[Jestertac]

Appreciate the replies!

I saw the picture of the fittings earlier, which helped me understand how the hydraulic shop got confused. I'll try to get there tomorrow morning and get it sorted out. I have a crapload of fittings for DOT airline, so I will try to replace the T and 90 fittings so I can screw them in directly.

I will report back when I have more information to help future searches.

 

[Jestertac]

To finish the injector drip lines, I used 1/8 NPT brass T fittings with (2) female ends--along with male threads to screw directly into the injector. The DOT airline compression fittings I used are 1/8 NPT; they screw into both ends of the T fittings after it is installed in the top of the injector.

Hope that helps if anyone is thread ignorant like myself. JIC, NPT, SAE, Metric, Compression...etc.

Not sure if I can link, but I found this to be useful: http://blog.parker.com/four-easy-steps-to-identify-hydraulic-threads