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Old 06-28-2019, 04:19 AM   #1
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Join Date: Sep 2015
Posts: 806
Year: 2002
Coachwork: Thomas Built Bus
Chassis: Freightliner FS65
Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
Maintenance Tip: CAT 3126 Water Pump Belt Replacement

Yesterday, I went to replace the water pump V-belt (cogged) on our CAT 3126. I had removed the idler pully for the serpentine belt and loosened up the serpentine tensioner so that I could remove the water pump V-belt. I found that the darn belt would NOT fit around the harmonic dampener.


I was looking at having to remove the harmonic dampener! I was thinking this was a crazy design that required removing the harmonic dampener for a simple belt change!


I went back into the house to vent a little and literally cool down (hot day outside) and told my wife about it. She is my internet research assistant and in a few minutes she had the solution ... turn the belt inside out so that the cogs of the V-belt point outward! This provides an additional 1/2" in diameter to the belt.


I went back out to give it a try ... sure thing, it was enough to allow the belt to slip over the harmonic dampener.
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Old 06-28-2019, 05:42 AM   #2
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Join Date: Oct 2017
Location: E Central Tejas
Posts: 1,997
Year: 1998
Coachwork: Thomas
Chassis: IH 3800, 8 window
Engine: T444E w/ Spicer 5-speed MT
Rated Cap: I prefer broad-brims hats
Wierd!
But, if ya gotta go backwards to move forward, so be it.
Cha-cha-cha!
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Old 08-25-2019, 11:50 PM   #3
Mini-Skoolie
 
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Join Date: Aug 2019
Location: Ohio
Posts: 49
Year: 2002
Coachwork: Thomas
Chassis: Freightliner FS-65
Engine: 7.2L Cat 3126 turbo diesel
Rated Cap: 71 passenger 30,000 gvwr
Appreciate learning that on the front end -- looks like my bus is a twin to yours.
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Old 08-26-2019, 03:56 AM   #4
Bus Nut
 
Join Date: Sep 2015
Posts: 806
Year: 2002
Coachwork: Thomas Built Bus
Chassis: Freightliner FS65
Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
Quote:
Originally Posted by banman View Post
Appreciate learning that on the front end -- looks like my bus is a twin to yours.
Indeed, it does!
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