Author Topic: Cat C-12 serpentine belt tension indicator  (Read 2045 times)

Fred Brooks

  • BAC Member
  • *
  • Posts: 1663
  • Thanked: 744 times
  • RVIA Certified Luxury Technician 49 years, Retired
Cat C-12 serpentine belt tension indicator
« on: December 08, 2024, 12:43:10 AM »
  Gentlemen,
  I recently had an issue with my Caterpillar C-12 engine. One of my serpentine belt idler pulleys locked up and destroyed the serpentine belt. I ordered replacement bearings for the idler pulley and fortunately I had the original belt as a spare. You are not going to find a 115.3" 8 groove belt at Auto zone. My point is this: How do you know if you have the correct length belt on your C-12? After cleaning the spring-loaded belt tensioner, I discovered the "indicator decal" that tells you if the tensioner is in the green zone or the red zone. As these coaches age, we do not know if previous owners have replaced the belt with the OEM correct length. I thought I would share this because it really sucks being broke down in the middle of nowhere. Merry Christmas! Fred
Fred & Cindy Brooks
2000 Marquis, Jasper
C-12 Wild Cat (U of A)
2014 Honda CRV
Proverbs 3: 5 & 6
The following users thanked this post: Roy Boles, Frank Bergamo

Gene Obie

  • BAC Member
  • *
  • Posts: 156
  • Thanked: 36 times
Re: Cat C-12 serpentine belt tension indicator
« Reply #1 on: December 08, 2024, 06:43:05 PM »
Thanks. One more thing to check.
-Gene

2005 Beaver Marquis, Ruby 40, C-13 Cat 525HP, Allison 4k
Towing 2018 F-150
Washington