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Go Back   Dodge Cummins Diesel Forum > 07.5 - 09 6.7 Liter Cummins > 07.5 - 09 3rd Gen 6.7L Powertrain
07.5 - 09 3rd Gen 6.7L Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine, Transmission, etc...NO ADVERTISING

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Old 07-04-2009, 03:20 PM   #1 (permalink)
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Replacing the Serpentine Belt Help

Tore my belt this morning...does anyone know how to get the belt off???
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Old 07-05-2009, 10:05 AM   #2 (permalink)
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There should be a pre-tensioner pulley that applies constant tension to the Serpentine belt. This is shown in the belt diagram on the fan shroud. You put a 1.2 drive ratchet in the center square hole and turn to release the tension on the belt. Remove the belt and install the next one, also relieve tension on the pulley as you place the new belt on the other pulleys.
Hope this helps you.
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Old 07-05-2009, 11:56 AM   #3 (permalink)
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I had a couple of kittens take mine out almost exactly a year ago. Pain in the a$$. No diagram to show you how it goes back on. Had to have dealer fax me a diagram, what ever happened to the sticker under the hood?
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Old 07-05-2009, 02:52 PM   #4 (permalink)
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my cab and chassis also had no diagram I replaced the belt while i did the water pump and it took longer to figure the belt out than to install the pump.
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Old 08-01-2009, 06:40 PM   #5 (permalink)
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I had to change out the alternator. No problem, however, I am having TROUBLE getting the drive belt back on!
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Old 08-01-2009, 09:12 PM   #6 (permalink)
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Quote:
Originally Posted by richard1 View Post
I had to change out the alternator. No problem, however, I am having TROUBLE getting the drive belt back on!
You can get a tool similar to this one for taking the belts off/on at AutoZone for about $20. I wish I had bought one sooner.
Amazon.com: BELT TOOL SERPENTINE AND ACCESSORIES: Automotive
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Old 08-01-2009, 10:43 PM   #7 (permalink)
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Originally Posted by richard1 View Post
I had to change out the alternator. No problem, however, I am having TROUBLE getting the drive belt back on!
Thanks for the input! Being this is my first time on the Forum, I hope this response gets out. Again, thanx! Job complete!
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Old 08-02-2009, 12:34 AM   #8 (permalink)
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Ok putting the belt on works best with 2 people. it can be done with one but its a pain. The back of the belt is going to have to go on the tensioner first. The tesnioner will have to be lossened first. It takes a 13mm socket or wrench. From there it goes around the crankshaft damper, around the fan pulley, around the powerteering pulley, around the pulley at the very top of the engine, down to the waterpump, up to the alternator pulley,down the the a/c compressor,then back to the tensioner. laptop battery dying pm me for details.
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Old 08-02-2009, 04:17 PM   #9 (permalink)
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Thumbs up Thanx for the input everone!

Quote:
Originally Posted by pricklypete View Post
Ok putting the belt on works best with 2 people. it can be done with one but its a pain. The back of the belt is going to have to go on the tensioner first. The tesnioner will have to be lossened first. It takes a 13mm socket or wrench. From there it goes around the crankshaft damper, around the fan pulley, around the powerteering pulley, around the pulley at the very top of the engine, down to the waterpump, up to the alternator pulley,down the the a/c compressor,then back to the tensioner. laptop battery dying pm me for details.
Thanx, pricklypete, for your help. The main problem I was having was I did'nt know the belt tensioner was spring loaded. After that, it was possible to put a 3/8" drive ratchet in the hole to pull back the tensioner to enable the belt to be positioned. By the way, I drive a '97 excab 3500 dually that I use to pull a 5th wheel trailer with.
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Old 08-02-2009, 11:25 PM   #10 (permalink)
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Sorry about that, I was giving belt info for the 6.7L I didn't realize we were talking 5.9
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Old 09-06-2009, 05:18 PM   #11 (permalink)
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Once person CAN (easily) release the tensioner!

Quote:
Originally Posted by pricklypete View Post
Ok putting the belt on works best with 2 people. it can be done with one but its a pain.
Just replaced my water pump on 2003 5.9 today, 135,500 miles. Engine had been running a little warmer the past few days, but there was no evidence of coolant weeping until this morning.

I'd like to add that once I understood how the tensioner worked with the 1/2" ratchet (hard to see between the fan the blades!), the whole replacement time took about 1 1/2 hrs.

I went from underneath the truck with the ratchet and used a ratchet strap wrapped around the 1/2" drive ratchet handle, tied to the bumper. Cinch up the ratchet, pulls the ratchet handle pulling the tensioner back. Left it in place until done, slid the belt back in place and release the ratchet strap, checking the belt is in place correctly. Jim
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Old 09-26-2010, 01:07 PM   #12 (permalink)
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Serpintine or drive belt and speed sensor

Hi all new to this forum. My drive belt or serpentine belt frayed and I am replacing it. I am a female and love my truck. But there is a note in my owners manual that states I must check the engine speed sensor near the damper. Ok really confused now. Where are they and what do they look like. How do I check them? What do I look for. Also you stated two people to replace this belt. Oops only little ole me. Please, help.
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