Parker 7165 hose on push-lok fittings leak

[SDrake]

For the benefit of others --- I replaced fuel supply lines from tank to CP3 with parker wavemaster 7165 fuel hose and push-lok fittings when I did the Cat 2micron filter install. In all there are 8 connections including the fuel pressure "T" in the canister to CP3 line. I have the intank pump.



6 of these leak and stay wet. I haven't been able to stop the leaks except for two connections with clamps. Somewhere I read to not use clamps but with the leaks I had to try something.



I am wondering if there is something in how I did the fittings. I just cut the hose square with a hose cutter, and pushed the hose firmly onto the fittings from tank to canister. On the canister to CP3 I heated slightly with a hair dryer to soften the hose to make easier to push on. I have leaks in both areas.



I have to fix this. I am loosing a significant amount of fuel and of course living with the smell. The fuel pressure reads a constant 12-14 PSI in warm weather, at startup and at full load. Seems to only vary with temperature. I never see change due to throttle position affecting the flow, not even when cruise control downshifted at 60MPH and engine went to 2700 RPM with me then pushing full throttle to make sure. All in all I think this is a good mod but the leaks are unacceptable.

 

[AH64ID]

Maybe its where I am reading the specs but I don't see that hose as being push-lok hose.

I have no leaks, seeping, etc on any of my fittings/hose.

That pressure seems VERY high for a stock pump. I have a big hose kit, hi-flow fittings, and see 9ish psi at idle, 7-8 cruise, and 5ish WOT.

 

[jhenderson]

Parker push loc fittings require Parker push loc hose.

 

[mwilson]

Parker push loc fittings require Parker push loc hose.

X2.



The correct fitting and hose combination in Parker Push-Loc will not leak. Period.



Wavemaster does not appear to be a push-loc hose. No coupling or connector series is shown on the data page which tells me it simply uses barbs with hose clamps like any other typical fuel line.



You need to get your hose and fittings matched, when it is right you will have the fight of your life trying to bottom out push-loc hose onto a push-loc fitting.



Wavemaster Data Sheet

Industrial Hose Products Catalog

No couplings shown



For reference the data sheet on Super Flex XL

Industrial Hose Products Catalog

Notice how the compatable coupler series are shown.



Hope this helps...





Mike.

 

[SDrake]

Maybe its where I am reading the specs but I don't see that hose as being push-lok hose.



I have no leaks, seeping, etc on any of my fittings/hose.



That pressure seems VERY high for a stock pump. I have a big hose kit, hi-flow fittings, and see 9ish psi at idle, 7-8 cruise, and 5ish WOT.

Regarding the pressure, I was surprised at the consistant 12-14 psi. I know nothing of the history of my pump. the original pump is gone and there is a pump in the tank. I am running stock fueling so I was not surprised to see no pressure drop at wot with the 1/2 inch line and the pushlock fittings replacing the banjos. The only appreciable drop seemed to me would be across the filters and they are new.



What hose are you using? I do not see the Super Flex XL in 1/2" size.

 

[SDrake]

Fueling observation

I came home towing a trailer and low on fuel but knew I would not run out. Backed the trailer up a 12degree hill and during maneuvering the fuel light came on. Unhooked the trailer and left the truck sitting overnight knowing it was fuel stop first thing away from home.



Turned the key on and no fuel pressure, tried a couple of times and went ahead and hit the starter and the truck started as expected, and ran for minute going down the hill and when I hit level ground the pressure came up after another 20 or 30 seconds. Meanwhile, the engine never showed any signs of low fuel pressure. I guess it was pulling fuel out of all those filters. Just found that interesting and slightly unnerving wondering about the CP3 with no fuel pressure to it.

 

[p-Bar]

Used the push lok setup on a pre oiler 60psi no problemas

 

[SDrake]

mwilson I responded to your post and jhenderson post and somehow it did not take. Basically I noted that the Super Flex XL is not listed in 1/2" size so I wondered what hose you are using or know about for this application.

 

[mwilson]

mwilson I responded to your post and jhenderson post and somehow it did not take. Basically I noted that the Super Flex XL is not listed in 1/2" size so I wondered what hose you are using or know about for this application.

First off, let me apologize for confusing you. I only showed the Super Flex XL as an example to illustrate that Parker will list the compatable series fittings when there is a match and your marine hose showed nothing for fittings. I was trying to hurry and should not have done that to you.



I should have taken the extra step to get you the correct series of hose.

My bad... ... .....



So with that being said I just got off the phone with my local Parker Distributor.

He says to use Parker 836 series hose for your push-loc fittings. It is high heat resistant and the best bet for underhood use. It is rated for Diesel Fuel even though the Parker sheet I have attached leaves a lot to be desired. I think that they have not updated the info as it is a fairly new product.



So you would want a part number of 836-8 which is 1/2" hose.



*****Link here... . 836-8-RL - Parker



*****A little better link here... . Parker 836 pushlok multipurpose Hose



*****And here is a link to the blurb from Fleet Equipment when Parker first launched the 836 Series of hose... New Parker 836 Push-Lok Plus hose features increased working pressures for more applications: Fleet Equipment





He did mention that any push-loc hoses using push-loc fittings were not DOT approved for on-highway use, only way push-loc hose was DOT approved was with the use of crimped fittings.



I told him a lot of us were not paying any attention to that, and we did not have this conversation... ... :-laf



I hope that this helps and again I am sorry for a half-a**ed answer last night.



Mike.

 

[AH64ID]

Your pressure is still quite amazing, does it increase if you brake hard? The pressure really should drop when WOT at least a few psi.

1/2 lines are overkill for anything below 600 hp, so I am not sure that your pressure is related only to 1/2" lines. The OEM pump is supposed to have an internal bypass that regulates the output pressure to about 10 psi, then you get the psi drop across filters and end up with 8-9 at the CP3. . Some are higher, just not many.

Here is a good read. http://www.glacierdieselpower.com/images/PDFs/IntankPumpExposed.pdf


I believe that 836 hose is the same stuff I have.

My local Parker store also said that the push-lock hose is only fuel rated with crimped on ends, for fire liability reasons... It works perfectly without crimped on ends, but that could be why some literature doesn't list fuel.

 

[SDrake]

Thanks mwilson, but you are way too apologetic imo. Your responses are always helpful and I certainly understand time constraint. Some day I hope to improve my search skills, I spent hours looking for information and simply could not find it. That is why I asked The TDR finally.



I have a parker store locally. I want to try a couple of feet to see how it works. But I want to try some fuel hose clamps on the 7165 hose. The rediator hose type may be puckering the hard inner liner or something. I was amazed when the hoses still leaked even when the clamps were tightened so that they dig in plenty in my book, -- more than I like to see and the fitting still leaked. And yes I know the leak is not from the threaded part of the fitting. Wrapped a papertowel around that part and wire tied it on. Still dry. The two connections to my fuel pressure "T" both leak and that fitting had the best finish and quality look to the push-lok barbs. I hate to mention the shop who sold the kit in case there is a mistake for which they should not be crucified. I have passed along the information I gained here and asked them to verify that they sent me the intended hose, their part number does not cross anywhere with the Parker 7165 so I wondered if a stock clerk mistake perhaps occurred.



AH64ID I have not watched the gauge when braking. I have only been on one pulling trip with my rig since gauges. My pressures are consistently somewhere in the 12-14 range and the variation seems to be from one driving time to another, I suspected temp related. On that one hard pull the pressure was on the low side as I quickly glanced and it only moved up perhaps about one psi when reaching the top of the hill. Next time I will go from wot to full off just to see what happens. Perhaps my pump is set on early burnout pressure and someday I will become sorry I did not persue my quest for a roadside fuelpump backup plan.



How far would you drive your truck if the fuel pressure dropped to zero and the truck was still running?

 

[AH64ID]

How far would you drive your truck if the fuel pressure dropped to zero and the truck was still running?

As far as I had to. The CP3 will draw fuel on it's own, possibly at reduced power, but it will draw on it's and shouldn't cause any issues.

 

[SDrake]

As far as I had to. The CP3 will draw fuel on it's own, possibly at reduced power, but it will draw on it's and shouldn't cause any issues.

Not that i ever intend to drive that way, but you gave me the peace of mind I need. Limping home is my financial survival. I had thought about investing in a external backup with a draw straw modification to my tank.

 

[rscurtis]

I have disconnected power to the Fass 95 on my signature truck and it doesn't know the difference- keeps right on going.

 

[steved]

I drove from somewhere in Utah/Wyoming to Pennsylvania with a dead FASS last fall (made that trip in less that two full days). I'm still on the original CP3 with 255k, and that happened probably 20k ago...