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Generator insulation?

Hello all...I popped open my generator bay door in front yesterday while checking coach in storage, and all the heavy rubberized, fiberglass backed insulation that was on the door sloughed off and pretty much disintegrated onto the ground. Stuff was pretty heavy. I assume it is also for sound proofing. Left kind of a mess on the inside of door. Is this type of product still made, or what do folks replace with. What would you use to clean old and attach new insulation. My coach is a 99 U295. Previous owner installed a Cummins Onan 8k.
Keith and Dawn Hudson #18766
Current- 1999 U295 DFGE 40ft. - Build #5405
Coach Name: 4BUS4US
Previous- 2008 Nimbus CE338: 40th Anniversary Edition- Build #6486. 
Toad: 2021 Jeep Cherokee Trailhawk

 "I know something about a lot of things..a lot about something's..and everything about nothing "

Re: Generator insulation?

Reply #1 –
Many posts on this subject,I use products made by Noico,can be had on Ebay,can scrape the old stuff off and lightly sand,are you sure you have fiberglass my 96 has a metal enclosure.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Generator insulation?

Reply #2 –
Yes, the front bay door, that pops up, is fiberglass....
Keith and Dawn Hudson #18766
Current- 1999 U295 DFGE 40ft. - Build #5405
Coach Name: 4BUS4US
Previous- 2008 Nimbus CE338: 40th Anniversary Edition- Build #6486. 
Toad: 2021 Jeep Cherokee Trailhawk

 "I know something about a lot of things..a lot about something's..and everything about nothing "

Re: Generator insulation?

Reply #3 –
Mine is still mostly intact,used some caulk to shore it up,probably could use the noico on that area,would be alot of scraping,
others will reccomend some other products,think that area you want something for sound reduction.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Generator insulation?

Reply #4 –
Be careful as the generator pulls air in to keep cool and loose debris in the compartment could cause havoc.

There are lots of Forum postings on reinsulating the generator and engine compartment.

Re: Generator insulation?

Reply #5 –
A couple to get you started

engine compartment insulation revisited

Generator refresh but with new style mounts

Generator Insulation Mounts and Hoses Video

Generator Box Reconditioned

generator box insulation

generator box insulation

Next Task - generator box insulation - questions
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Generator insulation?

Reply #6 –
It is sound proofing insulation and is only needed to reduce the sound of the generator. I did
mine and found insulation at a marine shop.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Generator insulation?

Reply #7 –
Point being missed here is if its falling off you need to unscrew the front cover , not just the access door and remove all you can before it drops down and effects cooling access and overheats the generator head. You can run without it for as long as you want. I removed mine and never reinstalled. I plan to eventually but hasnt even made the list yet, although it's probably time. With all mine removed I will measure the DB level running the air conditioners pre and post for comparison. Am curious how much of a difference it will make. Your generator engine will shut down if it overheats, BUT the generator head will not. It will run to destruction I believe.

Re: Generator insulation?

Reply #8 –
Ok... thanks guys. I will check the other areas of generator bay and make sure it is not falling. As I cannot slide the new generator out, it will just have to wait for another time...
Keith and Dawn Hudson #18766
Current- 1999 U295 DFGE 40ft. - Build #5405
Coach Name: 4BUS4US
Previous- 2008 Nimbus CE338: 40th Anniversary Edition- Build #6486. 
Toad: 2021 Jeep Cherokee Trailhawk

 "I know something about a lot of things..a lot about something's..and everything about nothing "

Re: Generator insulation?

Reply #9 –
Quote from: Bigoil76 –
Ok... thanks guys. I will check the other areas of generator bay and make sure it is not falling. As I cannot slide the new generator out, it will just have to wait for another time...
By removing the front cover this will allow access to most of the area. You will be able to reach over and remove falling insulation.

 Dont forget that the generator end bearing requires replacement eventually. Yours may be brand new condition, but if its not dont let it fail, costs way to much to replace a generator for a failed bearing.

Re: Generator insulation?

Reply #10 –
Sorry I forgot that you don't have the enclosed box. Crainman called and reminded me.  Makes way more sense. Nevertheless same bearing and  havoc voltage regulator issues.

Re: Generator insulation?

Reply #11 –
anybody used the liquid, brush on sound deadener?
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Generator insulation?

Reply #12 –

I have used this product twice, once for outer gen door (the outer cover not the actual gen) and once in my front overhead. 

It is lightweight and easy to work with. It it NOT as robust/heavy as the original, but works fine for noise and heat reduction.

DYNAMAT 11905 Hoodliner 32" x 54" x 3/4" Thick Self-Adhesive Sound Deadener

Amazon.com: DYNAMAT 11905 Hoodliner 32" x 54" x 3/4" Thick Self-Adhesive...

As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Generator insulation?

Reply #13 –
Quote from: dsd –
Sorry I forgot that you don't have the enclosed box. Crainman called and reminded me.  Makes way more sense. Nevertheless same bearing and  havoc voltage regulator issues.
Quote from: Bigoil76 –
What would you use to clean old and attach new insulation. My coach is a 99 U295. Previous owner installed a Cummins Onan 8k.

Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Generator insulation?

Reply #14 –
Quote from: Bigoil76 –
Hello all...I popped open my generator bay door in front yesterday while checking coach in storage, and all the heavy rubberized, fiberglass backed insulation that was on the door sloughed off and pretty much disintegrated onto the ground. Stuff was pretty heavy. I assume it is also for sound proofing. Left kind of a mess on the inside of door. Is this type of product still made, or what do folks replace with. What would you use to clean old and attach new insulation. My coach is a 99 U295. Previous owner installed a Cummins Onan 8k.
I used a brass wire brush on a drill to clean the fiberglass door of the old insulation.
It's a messy job and awkward to get at, so make sure you are not in a space where folks will mind.
I found the dust quite itchy too.
Once that was done I wiped down the surface with Isopropyl and let it air for a while before applying the new Dynamat style stuff with contact adhesive. So far so good, still holding on.
1998 U295 36'
Build# 5358

SMILE!....it makes people wonder what you have been doing.

Re: Generator insulation?

Reply #15 –
The original sound deadening insulation used in many places on the coach appears to be a mass loaded vinyl sandwiched in between two layers of open cell foam.  Great stuff but unfortunately did not hold up well to time and the elements.  I replaced the insulation in my front cap with EPS foil faced foam.  Does anyone know of a product currently available with a density similar to the original insulation and with equivalent sound deadening capabilities?
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI

Re: Generator insulation?

Reply #16 –
You can look at this from west marine
Fire retardant up to 225.
Don't know if that's sufficient temperature rating.
Frank & Daisy
NO LONGER  "looking for the perfect Foretravel
36' or less non slide preferred."  She has been found and is ours.
2003 U320 36' non slide  Unit 6103
Cummins ISM 450
Allison 4000MH