Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Cummins Engines
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-19-2016, 09:07 PM   #29
Community Moderator
 
CountryFit's Avatar


 
Join Date: Sep 2011
Location: Between the Oceans
Posts: 7,787
Blog Entries: 4
crah, great info... does the "new star screws" have the same thread as the old bolts'?
__________________
Steven & Polly
2000 Country Coach Intrigue 40' ISC 350
2018 Ford Explorer 4WD
CountryFit 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 04-21-2016, 11:32 PM   #30
Senior Member
 
crah's Avatar
 
Join Date: Sep 2011
Location: Las Vegas
Posts: 704
Quote:
Originally Posted by CountryFit View Post
crah, great info... does the "new star screws" have the same thread as the old bolts'?
That I'm not sure of. I had a mobile mechanic Install the new pump. It would have taken me a weekend to do myself with lots of cursing. I did try to tighten my old pump bolts but had no success with that. Looking back at it, I may have attempted to replace just the gasket if I had one one hand but I happen to be by a cummins shop and decided to buy the entire pump assembly.
__________________
Craig
2020 Winnebago View 24D
crah is offline   Reply With Quote
Old 04-22-2016, 10:31 AM   #31
Senior Member
 
AccessMaster's Avatar
 
Join Date: Apr 2011
Location: Humble, TX
Posts: 156
Thank you guys.

Thanks for all the great input on the lift pump issue. At the moment I am one of the lucky ones. I tightened the three bolts and the leak stopped. I have the gasket on the way as well.

Thanks again. You guys are awesome.
AccessMaster is offline   Reply With Quote
Old 03-06-2018, 03:15 PM   #32
Junior Member
 
Join Date: Mar 2018
Location: Elephant butte, NM
Posts: 7
Lift Pumps are Still Failing Out There

I too woke up one recent morning to a puddle of diesel under my coach. I spent lots of time on iRV@ and decided to try replacing the gasket first and then if there is still a problem, purchase a new pump. I followed a posting by jacwjames (which I greatly appreciate) and have the following update:

I spoke with Carl at Capital Volvo, 1-800-247-5673 and he said he still has 370 of the aftermarket gaskets in stock for the Cummins lift pumps and gets calls quite often. They are still $6.71 each and he is shipping me two via UPS. He said the aftermarket gaskets reference to Cummins part numbers 3964385 and 4935004.
cewarre is offline   Reply With Quote
Old 03-07-2018, 08:24 PM   #33
Senior Member
 
Join Date: Mar 2013
Posts: 168
I recently had mine replaced by a mobile mechanic. Took him about 2 hours to do it. Mine wasn't leaking or hard to start, just decided to do it as a preventative type maintenance. The new lift pump is nearly silent from inside the coach during the priming, the old one was very loud I could clearly hear it. When we first turned the ignition on to start the priming sequence, I had to go back to the open hatch to hear it. Was worried something didn't get hooked properly. Starts right up like before and is one more thing to check off my worry list.

While he was unpacking the new one from the box noticed it had a "Made In China" sticker on it. A lift pump for a Cummins diesel engine? We really don't make anything here anymore. Kept the old one just in case...
__________________
2000 HR Imperial 38 WDS
350 Cummins, Aero Muffler & AFE Filter
980 watt solar, 600 amp/hr LiFePo4, Victron
snowman1 is offline   Reply With Quote
Old 06-04-2018, 08:54 PM   #34
Senior Member
 
rgvtexan's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Oct 2009
Location: E WA or S TX
Posts: 3,904
Anyone use this pump? <$200.00

Cummins 4935005 Fuel Transfer Pump - Carp Coastal Marine Supply
__________________
04 Horizon QD, 12 Ford Flex, Excalibar, Brakemaster, Winter Texan, RVin! since 1974
Norm, Donna & Tinker Kat(RIP) 01 Z3
Life is a Timed Event, you only get One Go Around!
rgvtexan is offline   Reply With Quote
Old 06-04-2018, 10:03 PM   #35
Senior Member
 
guardrail53's Avatar


 
Monaco Owners Club
Vintage RV Owners Club
Join Date: Sep 2014
Location: anywhere U.S.A, Currently back home in Thailand!
Posts: 4,113
Quote:
Originally Posted by rgvtexan View Post
Same #, does not come with the gasket and the brass hose washers! Said the guy in the review? He also said that it worked perfectly! Sooooooo!!

I would order it, for the cost savings! And source the gasket and washers!

Rail!
__________________
Retired, and "Always on Holiday!"
1996 Monaco Windsor 38PB, "Mona" 275 HP., 8.3 Cummins, 3060 Allison 6 speed, 2001 PT Cruiser, "Bailey"
guardrail53 is offline   Reply With Quote
Old 06-18-2018, 09:54 AM   #36
Member
 
Join Date: Feb 2012
Location: Corvallis, Oregon
Posts: 58
My 330 HP ISC from the year 2000 had the much talked about Lift Pump leak. The bolts talked about I had tightened earlier without success.
I ordered a gasket from Capital Volvo and fuel line crush washers from Cummins (2 x 3963983 and 2 x 3963988) to repair my leaky pump. The pump a bit tough to get out and back in but otherwise the job is DIY kind of job taking about 4 hrs for whole process. Taking the pump apart the gasket and the fuel line washer were all swollen from fuel. Replaced those parts for total cost $21.65 and after 3 weeks and a few hundred miles no leaks. Hoping it remains that way.
Attached Thumbnails
Click image for larger version

Name:	IMG_1742.jpg
Views:	266
Size:	303.7 KB
ID:	207577  
__________________
Jay and Janet Bennett
2000 Alpine 36FDS
jbenalpine is offline   Reply With Quote
Old 06-18-2018, 09:58 PM   #37
Junior Member
 
Join Date: Sep 2010
Location: Simi Valley, Ca.
Posts: 15
Noticed fuel on driveway when we pulled out for our 2200 mile trip to visit all our families. Found a mechanic in a town 50 miles away (southern Calif. has 10,000,000 diesel rigs and maybe 100 mechanics to fix'em).
Pump--$420.83 Labor--$125.
Will check to make sure all gaskets, o-rings, and hoses are ULSD.
First engine breakdowm with 80000 miles on an 2004 ISC
8.3L.
scotcee is offline   Reply With Quote
Old 03-04-2019, 07:26 AM   #38
Senior Member
 
jimmy braden's Avatar
 
Texas Boomers Club
Holiday Rambler Owners Club
Join Date: Jun 2002
Location: What? Like right now? ;-)
Posts: 1,304
Mine only has the Bedside hatch access to pump. I think im just gonna let a professional do the work. I found one local guy that will do it for 105per hour labor.. And I bet he's 3x faster than I so I can prob afford that.. Looks like pumps are about 250now.
__________________
2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
jimmy braden is offline   Reply With Quote
Old 10-11-2019, 04:32 AM   #39
Senior Member
 
thebings's Avatar
 
Tiffin Owners Club
Join Date: Mar 2008
Location: Home
Posts: 110
Just received a new replacement pump. Was hoping to use the old plugs to fill the unused ports on the new pump. The old pump does not have removable plugs. Anyone know where the size or part number or where I can buy these plugs. I need three plugs, the two at the rear of the pump and the forward most port on the passenger side. I have already tried HD and auto parts store.
Thank
Don
__________________
Don & Carolyn Bingham
2003 Allegro Bus Freightliner 40DP ISL 400
2019 GMC Acadia, Blue Ox
thebings is offline   Reply With Quote
Old 10-11-2019, 10:19 AM   #40
Senior Member
 
thebings's Avatar
 
Tiffin Owners Club
Join Date: Mar 2008
Location: Home
Posts: 110
UPDATE:
Quote:
Originally Posted by thebings View Post
Just received a new replacement pump. Was hoping to use the old plugs to fill the unused ports on the new pump. The old pump does not have removable plugs. Anyone know where the size or part number or where I can buy these plugs. I need three plugs, the two at the rear of the pump and the forward most port on the passenger side. I have already tried HD and auto parts store.
Thank
Don
Found the Plugs at Cummins. All is good
__________________
Don & Carolyn Bingham
2003 Allegro Bus Freightliner 40DP ISL 400
2019 GMC Acadia, Blue Ox
thebings is offline   Reply With Quote
Old 11-04-2019, 11:28 PM   #41
Registered User
 
Join Date: Jul 2014
Posts: 795
I know you just repaired your Lift Pump and are good to go, but for others facing this problem I would recommend you by-pass the lift pump altogether (if you can) and put your money and time into a new FASS TS (Electric) Pump installation.

See other posts on how to install the FASS pump and protect your very expensive CAPS injection pump!

The picture shows who I had to install the TS Pump in my Itasca-Freightliner RV. The Pink Highlighter shows how Monaco-Spartan owners can by-pass the lift pump altogether.
Attached Images
 
imnprsd is offline   Reply With Quote
Old 11-05-2019, 06:10 PM   #42
Senior Member
 
Damion's Avatar
 
National RV Owners Club
Freightliner Owners Club
Join Date: Sep 2017
Location: Rice Lake, Wisconsin
Posts: 785
I replaced mine with this one $234.13
Did 10,000 miles to Alaska this summer to try it out!
https://www.mddistributorsstore.com/...-transfer-pump
__________________
2003 National Tradewinds LTC 7374 FL XC-Chassis IFS, Steer Safe, 8.3 ISC 350 Cummins, 3000MH Allison, 2015 Equinox, Blue Ox Tow-Bar, Brake Master Air Over Hyd
Damion is offline   Reply With Quote
Reply

Tags
ace, cummins, replace, replacement



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
ISC 8.3L Lift Pump H. Miller Cummins Engines 4 12-11-2015 12:53 PM
ISC 8.3 Lift Pump ?? supercub Cummins Engines 14 04-16-2015 06:04 AM
ISC 330 Electric Lift Pump 86 Cavalcade Monaco Owner's Forum 15 04-03-2015 06:19 AM
ISC Lift Pump Seal Kit? Vanwill Cummins Engines 3 10-26-2014 09:59 AM
Lift pump replacement 2004 Cummins ISL robinkletke Cummins Engines 27 03-02-2013 05:20 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 10:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.