RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Monaco Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 09-18-2018, 08:14 PM   #1
Junior Member
 
Join Date: Nov 2017
Posts: 23
Fuel lines on a Dynasty

I have a 1994 Dynasty that I just realized has a defective fuel gauge. I ran it out of fuel. So because of the age I decided to replace the fuel supply hose. At the tank the hose is 3/8 but its 1/2 at the lift pump. So I ran a 3/8 fuel line under the coach and and adapted it to the hose on the lift pump. Bled the system and it fired up and ran fine. But now i am getting fuel returning back from the old hose and its under pressure. What gives???
__________________

len6629 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-18-2018, 09:19 PM   #2
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,601
Cummins engines of your vintage ,I believe used a P 7100 injector pump and should have a line that returns fuel to the tank and someone may have tie it to the inlet side , perhaps where the line changed from 3/8 to 1/2 "

I'll see if I can find a fuel flow diagram.

EDIT : Found a diagram , the small hose shown in red , is the return line from the injector pump should run to the tank ,.
Attached Thumbnails
Click image for larger version

Name:	P 7100 fuel return.gif
Views:	39
Size:	78.0 KB
ID:	219615  
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 09-19-2018, 08:59 AM   #3
Junior Member
 
Join Date: Nov 2017
Posts: 23
I found the return line on the pump at the front of the engine on passenger side. What’s blowing my mind is the tank connections It has pickup and return for gen set. It has a vent hose and one other 3/8 in hook up. I assumed this is the fuel supply but where is the fuel return hook up. Certainly they didn’t use the same connections for the feed and return. I’m gonna need a stiff drink before this is over.
len6629 is offline   Reply With Quote
Old 09-19-2018, 09:56 AM   #4
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,601
Quote:
Originally Posted by len6629 View Post
I’m gonna need a stiff drink before this is over.

Only one ???
Over 8 years, owning current coach , and still finding things that have me scratching my head , but sometimes I can't tell if the issues are factory , or mods done by previous owners.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Old 09-19-2018, 11:05 AM   #5
Senior Member
 
Join Date: Aug 2015
Posts: 2,125
We just got one of the things too ('94 30' Dynasty) and I'm searching for every bit of information I can find about it for future reference. Thanks for starting this thread, and also thanks for posting the fuel diagram.

Steve
dix39 is offline   Reply With Quote
Old 09-19-2018, 11:20 AM   #6
Senior Member
 
Skip426's Avatar


 
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 18,601
Len and Steve , it's important when asking questions about your engines to include that it's a 12 valve , mechanical fuel injection engine , as over the years Cummins has used 3 different fuel systems on the 8.3 and 4 on the 5.9 that I'm aware of .
So if a member with a newer coach and engine gives you hints on repairing a problem , be aware that their fuel systems could be entirely different that yours.

Setting up a signature line , with this info in it , will save you typing it in every time you have a question.
__________________

__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote
Reply

Tags
fuel



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2014 Jamboree Sport 31d - fuel pump module/fuel lines JohnJohn Fleetwood Owner's Forum 1 02-20-2015 02:21 PM
Has anyone replaced their hard fuel lines (engine and generator)? neo102470 Fleetwood Owner's Forum 7 09-28-2010 05:33 AM
1994 F53 fuel lines subford Ford Motorhome Chassis Forum 2 07-18-2010 11:23 AM
Gas tank and fuel lines scoutmstr Workhorse and Chevrolet Chassis Motorhome Forum 7 09-15-2009 11:32 AM
generator fuel lines question 2racer Alpine Coach Owner's Forum 7 07-09-2009 10:59 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 07:15 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×