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05-21-2020, 07:25 PM
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#1
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Senior Member
Join Date: Mar 2005
Location: Northern Oklahoma
Posts: 5,062
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Does rust on belt tensioners affect engine belts
Been looking over the belts on my Cummins 450 engine and notice the tensioner rollers always have rust on them where the belts run after the coach as set for several weeks, or months.
Will this hurt the belts in any way, and if so what should be done?
__________________
2015 Dutch Star 4018
2017 Jeep Wrangler Sahara
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05-21-2020, 07:34 PM
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#2
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Senior Member
Alpine Owners Club Newmar Owners Club
Join Date: Oct 2005
Location: Fremont, Ca
Posts: 1,327
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Quote:
Originally Posted by wagonmaster2
Been looking over the belts on my Cummins 450 engine and notice the tensioner rollers always have rust on them where the belts run after the coach as set for several weeks, or months.
Will this hurt the belts in any way, and if so what should be done?
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It’s not a problem. It’s all good.
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Jerry & Judy, Fremont, California
2017 Dutch Star 4018
Freightliner, HWH Active Air
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05-21-2020, 08:12 PM
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#3
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Senior Member
Fleetwood Owners Club Freightliner Owners Club Spartan Chassis
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 2,752
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It will all polish off quickly.
Bill
__________________
2008 Newmar Mountain Aire
450 HP Cummins ISM 4000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
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05-21-2020, 08:16 PM
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#4
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Senior Member
Join Date: Mar 2005
Location: Northern Oklahoma
Posts: 5,062
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Thanks. That's a relief. Didn't know how to keep those shiny surfaces from getting rusty other than oiling and sure didn't think that was an option.
__________________
2015 Dutch Star 4018
2017 Jeep Wrangler Sahara
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05-21-2020, 08:28 PM
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#5
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Junior Member
Join Date: Dec 2009
Location: Hanson Ky
Posts: 8
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If it is just surface rust as a stain, no problem but if the rust is a little thick it will eat up you serpentine belt. I have seen this twice and using a little sand paper to remove the rust will solve the problem.
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05-21-2020, 10:25 PM
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#6
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"Formerly Diplomat Don"
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 24,122
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Allen....don't touch it and certainly don't sand it. Once you fire it up, it will wear right off.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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05-21-2020, 10:36 PM
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#7
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Registered User
Join Date: Oct 2017
Posts: 4,985
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The bigger concern is the rust you can't see, like the rust on the bearings inside the idler pulley's. Your engine is being exposed to moisture while sitting and the rust forming is just the symptom. Are you parking over dirt/grass? If so lay down a tarp or moisture barrier.
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05-21-2020, 10:41 PM
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#8
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Senior Member
Join Date: Mar 2005
Location: Northern Oklahoma
Posts: 5,062
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Just didn't know which was toughest, rust or the belts. Hoping for the belts.
Six months at a time in storage with just a couple of engine warm ups during all that doesn't keep the tensioners polished off very well. When can't take the coach out for a drive I will put a large piece of cardboard over the radiator vents and let the engine reach operating temps. Not the best solution but figure gives the engine good lubrication.
Always check the engine oil level before starting. Now will have to start taking a good look at the fan box supports too. Forum has such great information. Too bad so much of it has to be at the expense of someone.
Fellow used to tell me you'd work on your coach 2 hrs for every 1 hr of usage. Now think he was very overly optimistic, 2 hrs not near enough.
__________________
2015 Dutch Star 4018
2017 Jeep Wrangler Sahara
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05-22-2020, 03:35 PM
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#9
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Senior Member
Fleetwood Owners Club Freightliner Owners Club Spartan Chassis
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 2,752
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Quote:
Originally Posted by wagonmaster2
Just didn't know which was toughest, rust or the belts. Hoping for the belts.
Six months at a time in storage with just a couple of engine warm ups during all that doesn't keep the tensioners polished off very well. When can't take the coach out for a drive I will put a large piece of cardboard over the radiator vents and let the engine reach operating temps. Not the best solution but figure gives the engine good lubrication.
Always check the engine oil level before starting. Now will have to start taking a good look at the fan box supports too. Forum has such great information. Too bad so much of it has to be at the expense of someone.
Fellow used to tell me you'd work on your coach 2 hrs for every 1 hr of usage. Now think he was very overly optimistic, 2 hrs not near enough.
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The problem is you arn't using it enough. 
Bill
__________________
2008 Newmar Mountain Aire
450 HP Cummins ISM 4000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
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