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 > Your search for 'cummins isb' found 49 matches.

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  Subject Author Date Posted Forum
RE: Slide issues

I'm with Wayne on this. You might want to consider a different chassis in particular with consideration of your desire to tow a heavy vehicle. The Freightliner chassis the Palazzo is built on utilizes a Cummins ISB engine paired with an Allison 2500MH transmission. Although adequate for the size coach the Allison has a gross weight limit of 33,000 Lbs. I don't know how much an empty Palazzo weights but you really don't want to over stress the transmission. Over heat it a few times with a heavy load and you might be facing an expensive rebuild. If you can find a coach within your budget with an ISC version engine and 3000MH transmission I think you might be a bit happier. Just because the builder installed a 10K hitch doesn't mean you are good to that weight. Run the numbers to ensure you will be within all the various limits. I am a bit surprised Thor installed a hitch of that size. Most rigs built on this chassis have a 5K hitch such as a Tiffin Red or a Coachman Cross Country.
Dale.Traveling 12/18/14 03:10am Class A Motorhomes
RE: Economy mode on an Allison Transmission

We have a 2014 Thor Palazzo with an Allison MH2100 and a Cummins ISB. With the mode switch on and on flat ground with the cruse control set I was able to get 15 MPG. With the mode switch off I was at 12 - 13 MPG.
msturtz 12/07/14 12:25am Class A Motorhomes
"Battery boost" question

Looking for an explanation………. Last week we decided to go camping. Motorhome had not been started in a month. Also, the previous 2 nights got into the low 20s so decided to plug block heater in (Cummins ISB). Got all loaded up and after about 2 hrs. attempted to start the engine. Turned key and had 2 “growls” and then engine would not turn over. Waited about a minute or so and tried again, nothing. I then depressed the “bat boost” switch and tried to start again but had the same results, nothing. I checked the operation of the “bat boost” contactor and it was working as I could hear it energize when the switch was depressed. The house batteries were fully charged as I leave the motorhome plugged in. Put a battery charger on the chassis batteries for about an hour and tried the above again with the “bat boost” but still had nothing. I then decided to call my road service. After a few minutes a tech came on the line and I explained all of the above to him. He then wanted me to try one more thing. He said get in the motorhome and hold the “bat boost” switch down for 1 minute but do not try to start. After 1 minute he told me (still depressing the “bat boost” switch) to try to start the engine. Turned the key and the engine turned over and fired right up. He could give me no explanation as to why the “bat boost” switch had to be held down for a minute so he apparently had run into this situation previously. So, perhaps someone can enlighten me as to what transpired for that minute the “bat boost” switch was held on and the house/chassis batteries were “shorted” together to allow the engine to turn over. Thanks, Richard
Scrooge39 11/28/14 07:09am Class A Motorhomes
RE: Newbie Questions on 6th day of first trip...

This morning before my Tuesday apt, I thought I would give it a start to see if anything has changed. Really nothing has changed, but rather than just crank it after the glow plug light when off, I left the key in that position before starting and the trans light stayed lit for about 10 seconds, and then goes out. So the trans light stays lit (warning message and the icon light) before the engine is even running. Not that this helps me determine anything, but I thought I would throw it out there, it might be interesting to someone. I wonder if I can get a trouble code off the transmission somehow in that short period of time. I do not know if one is even generated. Below are the details of the MH. The MH is a 2104 Winnebago Journey 36M, Freightliner chassis, 6 speed Allison trans 3000 MH, Cummins ISB XT 6.7 L Turbo Charged Diesel with 360 HP, and 3,600 miles on the odometer. Not sure what else I could tell you about it. I am not a handy automotive guy. The engine seems fine, always has (knock on wood). Even the trans seems to run fine (knock on wood again). Can't say whether the after treatment works or not. Not sure how I would know whether it is or is not working. I have not lost any engine power at all in all this. Thanks, Tom
sloman2001 11/09/14 10:24am Class A Motorhomes
RE: ISB 300 Power loss / Turbo Failure

Start with the filters, this is the most basic thing to do when you start loosing power, especially if the problem came on after refuelling. Also check the air filter, never know. 250 codes is a lot of codes. Ask them which codes, otherwise this is a shot in the dark. Then ask them what are the codes related to. At least, if they are not sure, ask them to clear the codes and run the engine or test drive the MH, then recheck the codes. You have the same engine as mine, cummins ISB 300 HP 2003. Might be turbo sticking but I doubt it because this problem would likely cause an intermitent problem, sometimes it would stick, sometimes it would let go and work again. The second thing on the turbo could be the electric motor that drives the VGT, variable vane, or the position sensor that tells the ECM what is the position of the turbo VGT. The VGT sensor can be replaced, if they do not have the sensor, they can take the one from the EGR to test it, same sensor. The electrical motor could stop working completly or could be intermitent. The wires to the turbo could also be at fault. If it is electrical, you should have a code that says low voltage/low current or no voltage to VGT. A test can be done. If they are not able to make the VGT working with a test equipment, try this: While someone is turning the Key in the ON position but not starting the engine, as the key comes on, you should feel two cycle on the VGT, just put your hand on it. If you feel nothing, then there is a problem either with the motor or the wires, hope not the ECM. If you have the DC electrical motor on the VGT, the motor is not servicable, according to cummins. Common cause to electrical motor is they get coolant bypassing the seal in the VGT mechanism, very poor design from cummins and very poor in solving recurent problems. Turbo must be replaced as an assembly if motor is shot. The last price quoted from cummins to me was $3500.00. I would say it takes about 4 hours to replace. I could have a rebuilt one for $2000.00 and the other for $2600.00. I am checking right now to see if a VGT assembly can be bought separatly from the turbo. Good luck, keep us informed.
Kidoo 10/21/14 04:03pm Class A Motorhomes
RE: Is 360 hp enough for for 38-40 ft class A

I have a 38' DP with a Cummins ISB 275 5.9 and it has enough power. I pull 6-8% grades at 40-45mph no problem. Would more power be nice? Sure would, but for the price I paid I am extremely happy!
glamisorbust 10/20/14 12:37pm Class A Motorhomes
Fuel filter replacement on 300 Cummins ISB

Anyone know the proper procedure for my set up to replace the fuel filter? Been searching & have not found the specific process yet. Planning grabbing my manual, but thought I would ask before I dig through the massive case of manuals I have for my rig. :p Thanks
gsf35099 10/11/14 10:32am Class A Motorhomes
RE: Question on the Cummins 340

ALL Tiffin REDs have Cummins ISB 340hp engines. Great engine, GREAT Fuel mileage and plenty of power to go up west coast mountains with engine brake to help you back down. On the way up and over I70 at the Eisenhower tunnel we could pass semis and other motorhomes with bigger motors.
okgc 09/30/14 11:53am Class A Motorhomes
RE: Question on the Cummins 340

The Cummins ISB engine is a great little engine. Orginally 5.9L now 6.7L. Until recently most 38' DP's had a Cat 7.2L or a Cummins 8.3L engine. Doubt the hitch will be rated more than 5,000 lbs so there's your answer. Yes it will get you there and on flat ground you may get 9-10 mpg at 60 mph.
Ivylog 09/30/14 11:06am Class A Motorhomes
Fleetguard Fuel Filter Recall Information!

RECALL Subject : Fuel Filter Shell may Separate and Cause Stall Report Receipt Date: JUL 29, 2014 NHTSA Campaign Number: 14E051000 Component(s): Potential Number of Units Affected: 63,600 All Products Associated with this Recall http://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=R&searchCriteria.nhtsa_ids=14E051000# Manufacturer: Cummins Inc. SUMMARY: Cummins Inc. (Cummins) is recalling certain Fleetguard UFF-XT fuel filters, part number FF63009, manufactured April 25, 2014, to June 29, 2014 with a date code of 14115 through 14180. These fuel filters were installed on Cummins ISB engines built April 28, 2014, to July 9, 2014 and ISL engines built April 30, 2014, to July 8, 2014. Additionally, these fuel filters were distributed as replacement service parts. The fuel filter shell may separate from the fuel filter nut plate causing the engine to stall without warning. CONSEQUENCE: If the engine stalls unexpectedly there is an increased risk of a crash. REMEDY: Cummins will notify owners and dealers will replace the fuel filter with a non-defective one, free of charge. The recall began on August 20, 2014. Owners may contact Cummins customer service at 1-800-223-4583. Cummins' number for this recall is C1545. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
lj2654 09/27/14 01:46pm Class A Motorhomes
RE: How much weight do you tow? and with how much motor?

My 38' holiday rambler endeavor is a 99 model and has the 5.9 cummins ISB 275hp. Torque is 660 ft-lb @1600 RPM's. This coach moves up the hills, no problem at all. Not towing a trailer I can hold 45mph on most 6% grades. Towing my honda CRV I will drop to about 35-40. I love it.
glamisorbust 09/19/14 11:33pm Class A Motorhomes
What are the scan Codes for the 300HP cummins ISB 2003

Anyone has the codes for the 300 HP ISB 2003? Hi, I just got my scangauge and the codes detected are 42 and 275. I have a site that list the codes for the ISB but those codes are not in. I think the codes I found are for the pre 2003 models because it list the VP44, I have the cummins common rail and no VP44 (I think!) http://www.diesel-service-parts.com/cummins-codes.html Any link? Thanks
Kidoo 09/18/14 04:38pm Class A Motorhomes
99 HR endeavor with cummins ISB fuel leak

I was returning from my week long camping trip, had a fantastic time until I got to the RV dump. I got out while I let it idle for a few minutes. I walked around to the rear of my coach and found about a half gallon or so of diesel fuel on the ground, along with the whole bottom of the coach, engine, and my trailer covered in diesel. I shut it off immediately to figure out the problem. There is a hard fuel line going from the fuel filter housing to the injection pump. It is leaking from the fitting at the banjo bolt. Also, looks like someone already had this problem before(new to me coach), and patched the line with a piece of rubber 3/8" hose and a few clamps. Now, this line needs to be replaced but there is a huge problem. The place where the line is mounted on the injection pump only leaves about 3/8" from the head of the bolt until it runs into the air compressor for the brakes, etc. I can't back the bolt out enough to get the line off, that's how tight it is. I don't know if I will have to take off the injection pump or the air compressor. Both options look like a complete pain in the neck. Has anyone had this problem with a cummins ISB 5.9? Mine is a 99 model. Any help is greatly appreciated.
glamisorbust 09/17/14 03:51pm Class A Motorhomes
RE: How much weight do you tow? and with how much motor?

Thanks for the responses. It appears most of the coaches I've been finding with the Cummins have the Cummins isb but that info it is not always initially available. It would be great to get the isl and not have to even think about it. I wouldn't say you wouldn't "have to even think about it" with the ISL. That's what I have, and in SoCal, struggle on some of the long, steep grades. That's regardless of whether or not I'm towing. Gross Vehicle on my '07 Itaska Horizon 40'' is 34K, Gross Combined is 44K. I heard someone say you should have 1 horsepower per 100 pounds of weight, so at 44K I should have 440 horsepower (and, more importantly, the corresponding torque). That sure seems right to me!
Lurker1 09/13/14 01:10pm Class A Motorhomes
RE: 2015 Winnebago Forza 34T, 340 HP enough?

Hi, we recently ordered a 2015 Winnebago Forza 34T (actual length is 35'6"), and it has the Cummins ISB 340 hp, 660 lbs torque with the Alison 2100 series six-speed transmission. It is due to arrive soon, and we are very excited that we ordered this, The main question I have is this. Is this engine going to make me happy with the power going over all these high mountain passes? With all due respect, you should have asked that question before you purchased the new motorhome. My advice is regardless of how the motorhome performs, just be happy.
DownTheAvenue 09/13/14 12:44pm Class A Motorhomes
2015 Winnebago Forza 34T, 340 HP enough?

Hi, we recently ordered a 2015 Winnebago Forza 34T (actual length is 35'6"), and it has the Cummins ISB 340 hp, 660 lbs torque with the Alison 2100 series six-speed transmission. It is due to arrive soon, and we are very excited that we ordered this, as Winnie is now including some more standard features than the (already produced) 2015 Forza's, like Auto Generator start (temp,timer,voltage), gas and elec WH, and a new tiltable and swivel TV above the fireplace. The main question I have is this. We live at 8,600 feet in Colorado, and tow a Jeep Wrangler Rubicon. Is this engine going to make me happy with the power going over all these high mountain passes? I haven't been very happy with my current gas unit with the 8.1 big block. Thanks in advance!
FrontRangeRVer 09/13/14 11:52am Class A Motorhomes
RE: How much weight do you tow? and with how much motor?

Thanks for the responses. It appears most of the coaches I've been finding with the Cummins have the Cummins isb but that info it is not always initially available. It would be great to get the isl and not have to even think about it.
lewi7722 09/13/14 08:36am Class A Motorhomes
Code reader - Check Engine - Scangage - Silverleaf or OBDII

Hi, I did some reshearh and I am a bit confuse on what I should use to read the CEL Code on my MH. Does the scangage works in and reads the codes? I also read than the Silverleaf is a good system but would not read all the codes, and from what I have been reading, an OBDII would not work on RV Diesel Engine. I have a Chech engine light comming on once in a while. I have a Cummins ISB 300 HP 2003. The light comes on especially after using the engine brake or driving in town. It never come on at steady highway speed. When the CEL comes on, the engine will surge at around plus or minus 2000 RPM and loose some power while doing so. When I step on the pedal, the surge stops and it pulls good but the light stays on. Then the light disapear after a while. Sometimes the Cel light up after I start the engine then it goes off.
Kidoo 09/11/14 04:25pm Class A Motorhomes
Running a diesel in the rain

We were caught in a torrential downpour while returning home from a trip. We were in it for about 40 minutes. The engine (Cummins ISB 340) lost power twice within several minutes. It continued running, but no response to the throttle for several seconds. The second time the dash "warning" light flickered a couple times. After we got home and things dried up, I checked for water in the primary fuel filter and saw none. Could the symptoms come from all that moisture in the air getting pulled through the air filter? Thanks,
djlind 09/07/14 06:13am Class A Motorhomes
Dead Cummins ISB/275

Looking for some help with Cummins ISB/275hp in DP motor home. Started normally, backed it out of garage, went to close garage door and engine stopped, just like key switched off. Will nor re-start. Cranks at normal speed, but not seeing any sign of smoke out of tailpipe. Changed fuel filter, checked electric lift (supply) pump, it is running and have fuel delivery when cranking. Any ideas? Also, anyone know how to release spring (parking) brake, as I have no air pressure due to no engine running..so I can pull vehicle back into shop? RV is on a Freightliner chassis, with an electric throttle mechanism. Any suggestions would be appreciated...I can swap for Generator info, as I work on Onan/Kohler/Generac, etc at my work
bounder39zman 08/09/14 11:42am Class A Motorhomes
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