I used the push lock connectors when I set up the CAT.

Some time ago, someone had posted that no clamps were
needed and may actually damage the hose.

I'm old school and clamp everything...... but stop me if this is
not correct with the push locks. Thanks

http://www.dieselplace.com/forum/uploads/4AZ_Clamp.jpg

Far from necessary. I've only been clamping where attached to the smooth tubing.

clamps aren't requried. the reason they say not to clamp a pushlok is because the barbs are sharper and a bit bigger. if you tighten the clamp it may cut the line on the inside. i only clamp barbs, although it isn't even necessary there as i've never been able to pull one off. i agree with John..

Ditto, Parker Push-Lock style fittings are virtually impossible to take apart without cutting the hose. They work great!!!

How do they work at -40F? Hoses turn to granite and loose stretch. Seems they would leak or blow off.

Temperature Range
-40°F to 180°F (-40°C to 82°C)
Limited by media through hose assembly.
Pressure Range
Limited by hose l.D.

Parker PDF (http://www.parker.com/pneumatic/cat/english/0700P-FitHose.pdf)

Does anyonr know if these are the same connections provided with the New Racor RK32313 kit? The hose connectors in that kit have the yellow piece as shown in the above pic. Reason I ask is, they provide clamps for these connectors.


How can I tell if these are push locks?


thanks.

take a picture of the barb and i'll tell you to be sure. all the pushloks i've seen have the yellow ends. none of my barbs do. they look different than a barb of the same size. less teeth, but they are a bit larger in overall OD.

I use these same fittings everyday at work ,by the hundreds, and have NEVER had one lose the hose. Ours are mostly used to carry glycol through the ovens that are used on the evaporator cores that are used in our wonderful trucks. The temps can get pretty high at times. The hose will break before you will be able to pull it off. Don't use the clamps. They will shorten the hose's life quite a bit.

I would acyually deem the puslocks highly unlikely to cut the hose as the barbs are "flatted" rather than sharp. I've removed (actually cut off) the hose and see no signs of tearing, and that is AFTER rotating the fitting within the hose while R&Ring.





A simple hose clamp will do VERY little at -40°f as the entire hose shrinks. This, (among other reasons) is why I use the expensive constant torque clamps as shown here:





http://www.kennedydiesel.com/detail.cfm?ID=241

You all talking pressure?

Fuel system is vacuum. I like clamps. Don't see where it would hurt.

Diesel Power, thanks. Here is a pic of one of the Racor supplied fittings. Is this a push-lock?


http://www.dieselplace.com/forum/uploads/EB4_DSCN0367.jpg


thanks

Yes....... it is. You're saying that Racor supplied clamps for
these flttings? Maybe a Racor tech needs to provide the
insight whether to clamp or not to clamp http://www.dieselplace.com/forum/smileys/Geek.gif Edited by: 56Nomad

The Racor instructions definitely state clamps should be used with this fitting, and they provided your basic generic cheap clamps such as shown in the first photo of this topic. When I saw the above photo, and the concensous was "no clamp", I became a little confused in light of what Racor is telling me.





thanks 56nomad

Interesting. Parker makes the push lock fittings, the hose and the filter assembly........ and they recommend clamps.

Maybe we can save them a few bucks and tell them that they
don't need clamps http://www.dieselplace.com/forum/smileys/Clap.gif

Are pushlok fitting designed for vacuum applications? I'm just concerned that pressure actually helps the hose grip tighter whereas low vacuum may be an issue. It doen't take much of an air leak to cause problems and they are very difficult to find. That's why I decided to clamp.

Hoot, I would think presence of vacuum would actually make a tighter connection, as compared with a pressurized hose. But what do I know. I believe I am going to clamp mine per Racor's instructions. Looks better without, but, who's going to see it anyway.

Hoot, I would think presence of vacuum would actually make a tighter connection, as compared with a pressurized hose. But what do I know. I believe I am going to clamp mine per Racor's instructions. Looks better without, but, who's going to see it anyway.

Strong vacuum I agree. Low vacuum I'm not so sure.

To be honest, when everything is new, as hard as it is to get that hose on, I'm sure there aren't any leak issues either way. As things get older... who knows. Heat, cold, hose hardening. I'm just justifying myself again.Edited by: hoot

Yes, after doing some digging on Parker's website last night, there fittings and hose are vacuum rated...down to 29 inHG...


Well hell, as anything gets older it will be prone to leaking and cracking...otherwise why would we need to change our coolant hoses..or A/C lines??


Are we going to have to change these fuel line someday, you bet...how long, depends on your climate...just like everything else on our truck.