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 02-22-2016, 03:12 PM   #1
Senior Member
 
crah's Avatar
 
Join Date: Sep 2011
Location: Las Vegas
Posts: 699
Cummins ISC lift pump replacement

Well I've been hit with the dreaded lift pump leaking. I have a 2003 Holiday Rambler coach on a 2002 Roadmaster chassis with a cummins ISC 350. The pump was quite hard to access with some wiring looms in the way. I searched the forum and found that tightening the bolts sometimes does the trick. My bolts were all tight so looks like I need a replacement. Anyone have a part number and source to get these pumps from? Any pointers on the replacement? Looks like 4 mounting bolts and I couldn't really see the other connections well. I'm sure there is a fuel input/output and maybe a wiring harness?
__________________

__________________
Craig 2003 Holiday Rambler Scepter 36PST
RR8S 350 Cummins ISC with Banks
2011 Buick Enclave Towed with Readybrute
crah 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 02-22-2016, 09:44 PM   #2
Senior Member
 
jacwjames's Avatar
 
Monaco Owners Club
Join Date: Jun 2014
Posts: 6,088
I don't have a leak but have been doing some research in preparation in the event I get one.

If you haven't already join the Cummins Quickserve site, once you register out in you engine serial number. it will bring up some screens, go the parts, fuel systems, Accessories, Fuel transfer pump. It will give you the appropriate part number.

Cummins has changed the part several times so using the Quickserve site will give you the right one.

My part number is 4935005 and will cost ~$375 depending on where you get it. This is the complete assembly including the mount.

Back in the mid 2000's after the ULSD was put on the market there was a rash of fuel pump failures. The low sulfur fuel would cause a gasket failure in the fuel transfer pump. Cummins put out a bulletin instructing service shops to replace the gasket however they stopped doing this as a gasket cost $7 with 1/2 hour of labor versus the new transfer pump.

I found my gasket number is 4928511 and am searching for a place to buy it, found one place that I will confirm this week. I intend to buy a gasket to have as spare.

Keep us posted on your fix
__________________

__________________
Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is offline   Reply With Quote
Old 02-22-2016, 09:55 PM   #3
Community Moderator
 
CountryFit's Avatar


 
Join Date: Sep 2011
Location: Between the Oceans
Posts: 6,078
Blog Entries: 4
can you look at where the leak is at? you might need a mirror or video camera to see it. most likely the leak is from the gasket between the pump and the mounting bracket. i remember there are 3 bolts holding the pump, if those are very right as you said, chances are the gasket is torn. get that replaced, you might resolve the problem.
__________________
Steven & Polly
2000 Country Coach Intrigue 40'
2014 Ford C-Max Energi
CountryFit is offline   Reply With Quote
Old 02-22-2016, 10:43 PM   #4
Senior Member
 
John Jones's Avatar
 
Join Date: Aug 2015
Location: Oregon
Posts: 563
Keep us posted on where to buy the gasket. I might get a couple for myself!
John Jones is offline   Reply With Quote
Old 02-23-2016, 10:29 AM   #5
Senior Member
 
AFChap's Avatar
 
Winnebago Owners Club
Spartan Chassis
Join Date: Aug 2002
Location: ...hopefully on the road!
Posts: 4,966
I had a Cummins SE location replace mine. They did it from the top via the under the bed/closet access holes.
__________________
Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '05 Honda Odyssey toad
AFChap is offline   Reply With Quote
Old 02-23-2016, 11:28 PM   #6
Senior Member
 
crah's Avatar
 
Join Date: Sep 2011
Location: Las Vegas
Posts: 699
Thanks all for the info. I will order a new pump this week sometime and hopefully get it changed out soon.
__________________
Craig 2003 Holiday Rambler Scepter 36PST
RR8S 350 Cummins ISC with Banks
2011 Buick Enclave Towed with Readybrute
crah is offline   Reply With Quote
Old 02-24-2016, 11:08 AM   #7
Senior Member
 
jacwjames's Avatar
 
Monaco Owners Club
Join Date: Jun 2014
Posts: 6,088
I just placed an order for the gasket, I ordered it from

Phone # 1-800-247-5673
Clarence Henley
Capital Volvo Trucks & Mitsubishi
Capital Trailer & Equipment Co., Inc.
Capital Exports of the US
www.capitalvolvo.com

Price was $6.71 plus shipping, he was going to try and ship it USPS instead of UPS.

This is not a OEM part but aftermarket gasket. I don't think Cummins even sells this part.

Here is a link to the service bulletin,
http://www.alpinecoachassociation.co...ft%20Pumps.pdf
I searched the Quickserve site and this bulletin isn't even available anymore. It lists 2 different gaskets but the Capital Volvo shop said the 2 numbers interchange.

I have ordered one of the gaskets and will keep it as a spare just in case. I plan to check the transfer pump on a regular basis for leaks.
__________________
Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is offline   Reply With Quote
Old 02-24-2016, 03:05 PM   #8
Senior Member
 
Dave Fernandez's Avatar
 
Alpine Owners Club
Join Date: Jun 2003
Location: Ontario, CA USA
Posts: 1,332
I replaced my lift pump last year on 2001 Alpine 38ft MH. Because of the island bed the procedure was not to difficult. It took me 4 hours because it was over 100 outside and humid. Because I was working on the engine with the cover open for access I was stuck with heat and humidity. If I had only replaced the gasket and it did not work I would have been real mad. Just because all the work to R&R for just a gasket.

I am glad I replaced the entire pump assembly now no worries. The new pump was designed to operate with the ULSD.

I also replaced all of the O rings on the fittings with the upgraded O rings for use with ULSD.

Now I do have any worries about the pump and fittings leaking.
__________________
Dave Fernandez
2001, 38ft FDDS, 350 ISC, Tow 2004 Yukon
http://www.alpinesocal.com
Dave Fernandez is offline   Reply With Quote
Old 02-25-2016, 09:38 AM   #9
Senior Member
 
Monaco Owners Club
Join Date: Sep 2013
Posts: 1,691
Quote:
Originally Posted by jacwjames View Post
This is not a OEM part but aftermarket gasket.
A bunch of folks would benefit if you show the part & packaging, manufacturer etc. when you get it. I'm curious to see if it is a paper or rubber type gasket.
__________________
2007 Monaco Signature Noble III 45' ISX 600HP
hypoxia is offline   Reply With Quote
Old 02-26-2016, 03:38 PM   #10
Senior Member
 
Coma's Avatar
 
Monaco Owners Club
Join Date: Nov 2010
Location: The Emerald Coast
Posts: 1,759
The pump is also prone to leaking at the electrical inlet, no gasket for that. The new pump is configure differently than the old one, so you will need assorted adapters and plugs to make it work.

It was about $400 labor to have it put in.
__________________
Jim and Jennie, Cats=Bittles and Potter, 2000 Dynasty 350 ISC
2013 Silverado 4x4 Towed with R1200GS in bed.
PROV23:4 Do not wear yourself out to get rich; have the wisdom to show restraint.
Coma is offline   Reply With Quote
Old 02-28-2016, 08:51 AM   #11
Senior Member
 
jacwjames's Avatar
 
Monaco Owners Club
Join Date: Jun 2014
Posts: 6,088
I received the transfer pump gasket in the mail yesterday. I is packaged in a small plastic type bag and has Genuine Cummins Parts with the Cummins Insigna and is dated 9/18/06. This is close to the date range of the TSB that I found on Cummins. (note the sales person said that they had the gasket made and would be and after market part).

The gasket is made of a heavy rubber type material.

Anyway, I'm keeping the gasket just as insurance (cost $7.71 including shipping) in case I'm stuck on the side of the road. I would repair and then when I get home change out the lift pump.

Unfortunately Cummins no longer just sells the lift pump but you have to buy the entire mounting assembly for an outrageous price.
__________________
Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is offline   Reply With Quote
Old 03-23-2016, 09:14 PM   #12
Senior Member
 
Monaco Owners Club
Join Date: May 2009
Location: Melbourne, Florida
Posts: 134
Mine to is leaking. Ordered one today. I noticed something was leaking, just tracked it down.
Attached Thumbnails
Click image for larger version

Name:	IMG_1629.JPG
Views:	1900
Size:	180.7 KB
ID:	122177  
__________________
2000 34' York Dynasty
2013 Jeep Wrangler Unlimited
passerby is offline   Reply With Quote
Old 03-24-2016, 07:11 AM   #13
Senior Member
 
USMCRET's Avatar
 
Newmar Owners Club
Join Date: Jul 2011
Posts: 1,913
Where is this lift pump generally located on these engines?
__________________
2005 Newmar KSDP 3910
ISC on a Spartan
USMCRET is offline   Reply With Quote
Old 03-25-2016, 08:21 PM   #14
Senior Member
 
Monaco Owners Club
Join Date: May 2009
Location: Melbourne, Florida
Posts: 134
Mine is on passenger side, halfway between top and bottom of engine. It has lots of hoses.
__________________

__________________
2000 34' York Dynasty
2013 Jeep Wrangler Unlimited
passerby 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 01:53 PM
ISC 8.3 Lift Pump ?? supercub Cummins Engines 14 04-16-2015 07:04 AM
ISC 330 Electric Lift Pump 86 Cavalcade Monaco Owner's Forum 15 04-03-2015 07:19 AM
ISC Lift Pump Seal Kit? Vanwill Cummins Engines 3 10-26-2014 10:59 AM
Lift pump replacement 2004 Cummins ISL robinkletke Cummins Engines 27 03-02-2013 06:20 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:22 AM.


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