New fuel lines

Topic: New fuel lines (Read 2684 times) previous topic - next topic

Re: New fuel lines

Reply #50 – November 18, 2020, 10:19:49 pm

John H. I was able to snap a photo of one of the connectors that were used on the new line. This is from the passenger side. All the lines I could see had very long radius turns. No kinks.

Re: New fuel lines

Reply #51 – November 18, 2020, 10:24:01 pm

This made sound stupid but hopefully they put the fuel back in the tank.

Re: New fuel lines

Reply #52 – November 18, 2020, 10:28:16 pm

Oldguy, the only stupid question is the one not asked. And yes. They put my fuel back in.👍

Re: New fuel lines

Reply #53 – November 19, 2020, 09:37:36 am

Jerry, one other consideration if they connected the hoses wrong at the top of the tank, switched feed for return it won't pick up any fuel as the feed has a tube that extends inside the tank and the return does not.

Re: New fuel lines

Reply #54 – November 19, 2020, 10:32:14 am

Quote from: Mobius – November 19, 2020, 09:37:36 am

Jerry, one other consideration if they connected the hoses wrong at the top of the tank, switched feed for return it won't pick up any fuel as the feed has a tube that extends inside the tank and the return does not.

Different size fittings and hose. It is a very tight fit on a 320 above the tank. I used a 4 foot shoe horn basically to get lines not kinked. I did kink the generator line but resolve before it was a problem. But easy to verify prior to being wetted with fuel. Not the time to rush thru installation. I actually preferred not having help.
Scott

Re: New fuel lines

Reply #55 – November 19, 2020, 11:00:18 am

Thanks for all the suggestions.

As I did hire this out, there is only so much I can do in shadowing them while they work.

The coach was in a bay uninhabitable during the actual fuel line R&R last Thursday/Friday. So we were unable to actually witness the event as we were in a hotel Wednesday till Friday noon.

The coach hasn't been touched since Monday. And even then was only only worked on for 1-1.5 hrs.
Tuesday morning I put a stop to the work and told them to get and install a priming fuel filter block.

The new filter block will be here tomorrow. So we will see how that goes.

Here is a photo of the current #1 filter block. Just a basic in/filter/out setup. Sorry but the photo was unable to be rotated.

Re: New fuel lines

Reply #56 – November 19, 2020, 12:08:31 pm

Thx for picture Jerry. I am not sure I like those fittings as they sure restrict the flow of fuel. Did they use 5/8" id hose or 1/2"?.Johnh

Re: New fuel lines

Reply #57 – November 19, 2020, 12:35:17 pm

John H.
they took all the OEM lines to the hose maker as examples of what & how much they needed. So they are fine.

Re: New fuel lines

Reply #58 – November 19, 2020, 12:49:57 pm

Jerry that picture shows a different hose than in post #50 and it looks old? I was assuming that they changed the fuel lines, which would include to fuel cooler and between filter and engine. Also between tank and generator and Aquahot including the Aquahot remote filter if installed in the generator cooling area and all return hoses?
Scott

Re: New fuel lines

Reply #59 – November 19, 2020, 01:07:56 pm

They reused the old protective cover on the new hose.

The picture in post 50 was just to show what connectors were used as it was brought up somewhere that I should make sure that they didn't use hose clamps.

I have no idea if the hose in post 50 is to the engine or from the engine. The connector and the hose look to be high quality. And I'm good with that.

I appreciate all the help. But I'm getting a complex.

Re: New fuel lines

Reply #60 – November 19, 2020, 08:37:03 pm

Tommy D and I know all about kinked fuel lines.

Re: New fuel lines

Reply #61 – November 20, 2020, 08:51:35 am

Looks like they used the equivalent of the original Aeroquipt lines, hydraulic lines with braided cover, probably at least single wire. Doesn't seem likely these would get kinked. High quality lines for sure, plenty stiff.

After replacing the banjo bolt return line on the engine, and noting it is at max 1/4" really wonder about the necessity of these 5/8 lines?

Re: New fuel lines

Reply #62 – November 20, 2020, 11:25:11 am

Chuck P, thank you for that. I needed to hear a positive comment.

I was only miffed about the shop expending so many hours doing the shade tree prime before telling me I had no prime pump.

Re: New fuel lines

Reply #63 – November 20, 2020, 11:57:19 am

Quote from: Chuck Pearson – November 20, 2020, 08:51:35 am

Looks like they used the equivalent of the original Aeroquipt lines, hydraulic lines with braided cover, probably at least single wire. Doesn't seem likely these would get kinked. High quality lines for sure, plenty stiff.

After replacing the banjo bolt return line on the engine, and noting it is at max 1/4" really wonder about the necessity of these 5/8 lines?

Chuck, I am not an engineer but doesn't fluids kind of follow electrical. longer runs need larger sizes?

Re: New fuel lines

Reply #64 – November 20, 2020, 05:12:59 pm

Update, Tech just got through installing the pictured priming fuel filter.

Engine fired up after 3-4 seconds of cranking. Going to set it on high idle for a while then shut it down for a bit and start it again.

Re: New fuel lines

Reply #65 – November 20, 2020, 05:17:24 pm

Great news. So glad to hear they got it started
Scott

Re: New fuel lines

Reply #66 – November 20, 2020, 07:02:08 pm

Most definitely dsd.
Now to have a nice chat with the service manager seeking some relief for the multiple hours wasted doing the back yard style air purge.

Re: New fuel lines

Reply #67 – November 20, 2020, 07:15:15 pm

Quote from: craneman – November 20, 2020, 11:57:19 am

Chuck, I am not an engineer but doesn't fluids kind of follow electrical. longer runs need larger sizes?

Yes, that's true, though on the return line the banjo bolt actually acts as a restrictor to keep fuel pressure up to intake of injector pump. Seems likely that some additional restriction in return line would have little effect, and possibly a positive effect as banjo spring weakens over time.

Re: New fuel lines

Reply #68 – November 20, 2020, 11:41:46 pm

I do like the filter minder they installed. I too installed on my coach. They are to be installed after the filter to show If the engine pump is sucking against a plugged filter. Hard to tell that it past the filter in your picture. I swear looking at my fuel minder it has fuel in the indicator section. Still seams to work okay. Doesn't leak. After you make a extended full power pull I marked on the indicator as my base line indication. It's always about halfway thru the range after a hard pull. I've replaced the filter with no change in indication on the minder. If you go to
Steel
They have the correct DOT line fitting if you ever want to change out what they installed on your fuel filter. Last ones I bought were under two dollars each and you will be able to have a factory looking installation. So glad this is almost behind you. Don't let them beat you up much.
Scott

Re: New fuel lines

Reply #69 – November 21, 2020, 01:00:20 am

dsd, I like the idea of a filter minder. No reason to toss a filter that is still filtering or change out early should goo get into the filter.

As for where the filter minder sits in the circuit, I have no idea. But I will trust that the folks at Parker/Racor know what they are doing.

Also, when this filter assembly was ordered from a Freightliner dealer. The dealer wanted my engine model/serial number. I would assume that it was to ensure that the proper filtration/flow rate system was ordered.

I have started the engine several times now, and all is well.

Re: New fuel lines

Reply #70 – November 21, 2020, 09:17:58 am

Quote from: bigdog – November 17, 2020, 07:55:08 pm

They come and tell me that for some reason someone in the past removed the the first fuel filter block with the primer pump and replaced it with a unit that doesn't have a primer/purge pump. ?WTF over.

Jogged my memory - are you saying someone removed or modified the Racor system on your coach at some time in the past?

Racor and Winn fuel filters and housing

Racor 790R30 primary filter

Re: New fuel lines

Reply #71 – November 21, 2020, 09:31:29 am

Quote from: bigdog – November 21, 2020, 01:00:20 am

As for where the filter minder sits in the circuit, I have no idea.

In your picture in reply #64 the fitting on the right should be the line to the engine and the hose on the left should be the pickup in regards for the minder to work correctly. If it's on the pickup/in side it will measure pickup restriction which should always be low. If it's on the out/engine side it reads filter restrictions Which is what your seeking with the minder to tell if it's plugged. Housing will have a in and out arrow. Out to engine. In from pickup/fuel tank
Scott

Re: New fuel lines

Reply #72 – November 21, 2020, 09:53:48 am

Wishing you the best BigDog in your quest for relief! We will be looking at changing our fuel lines out as well, sooner than later. Already had an issue with the Aqua Hot lines and a huge shout out to Rudy for that diagnosis! It was sucking air around the cracks at the fittings. Will have to address this issue when we get back to Rudy in Baytown, but for now, it is working. I ordered and received a new Racor that I will install this week in the Aqua Hot area instead of the long run up in the generator blower area.

Re: New fuel lines

Reply #73 – November 21, 2020, 10:37:33 am

Quote from: dsd – November 21, 2020, 09:31:29 am

Housing will have a in and out arrow. Out to engine. In from pickup/fuel tank
Scott

Most Racor filter blocks have four ports so they can be configured either right or left intake, unused ports are field plugged.

Re: New fuel lines

Reply #74 – November 21, 2020, 11:06:54 am

Michelle, When I first took the coach into my local truck shop for an oil change. They showed me where the primary filter 'had' been and the two fuel lines that went in and out of the filter were connected. My first oil change was done in Mt. Vernon, Wa. When I had a failure of the shift pad. This was the trip to pick up our new to us coach. Sad that the Freightliner dealer in Mt. Vernon that has many shops in the PNW didn't bother to tell me that i didn't have a primary filter.

So yes, someone had not only bypassed the primary filter. They even removed it. So I had no idea it was missing until my local shop pointed out I had no primary fuel filter.

So I of course told them to install one. As I didn't know any better to ask for a priming pump. They put on a plain filter block.
And to be honest. It hasn't presented any issues for the years it has been there. That is, until the mass purge/prime needed due to the fuel hose change.

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