Attention: TDR Forum Junkies If you have not noticed as you open the TDR site, there is an item on the idler pulley. I am very pleased that we have an option on this part. I have now replaced three idler assemblys.
If you have or are getting near 200k miles, I would reccomend that you take a look at the idler. The condition of the outer plastic wheel will indicate general condition. One of my idlers failed because of wear on the arm mount. The belt was running slightly off center and had ruined the belt twice before I picked up on the problem. And the belt isn't cheap.
Two of the assemblys could have been used with just the new pulley. Of the three that I replaced, one was bought on the road and was quite high. If you need a replacement for the entire assembly, go to Cummins for a much better deal. We buy at dealer cost and I don't know what user retail is but I am betting that it is less than Dodge. The Cummins part number for all my trucks is 3935819. There may be a difference if the engine doesn't have air. I don't know. Cummins uses the engine serial number and build date for all reference. Be sure you have that when you contact any Cummins parts person.
I seriously doubt that the idler will run to 300k so heads up if your mileage is getting high. If you plan to keep your truck, and the assembly looks good, it would be wise to order the pulley and have it on hand.
I also remember a post regarding the tensioner spring getting weak. The idler is a definite source of problem so look into this.
I have no connection with the folks offering this part.
1stgen4evr
James
If you have or are getting near 200k miles, I would reccomend that you take a look at the idler. The condition of the outer plastic wheel will indicate general condition. One of my idlers failed because of wear on the arm mount. The belt was running slightly off center and had ruined the belt twice before I picked up on the problem. And the belt isn't cheap.
Two of the assemblys could have been used with just the new pulley. Of the three that I replaced, one was bought on the road and was quite high. If you need a replacement for the entire assembly, go to Cummins for a much better deal. We buy at dealer cost and I don't know what user retail is but I am betting that it is less than Dodge. The Cummins part number for all my trucks is 3935819. There may be a difference if the engine doesn't have air. I don't know. Cummins uses the engine serial number and build date for all reference. Be sure you have that when you contact any Cummins parts person.
I seriously doubt that the idler will run to 300k so heads up if your mileage is getting high. If you plan to keep your truck, and the assembly looks good, it would be wise to order the pulley and have it on hand.
I also remember a post regarding the tensioner spring getting weak. The idler is a definite source of problem so look into this.
I have no connection with the folks offering this part.
1stgen4evr
James
Anyway, my odo. was right around 285,000 miles. I think this was the first one for the engine, though. Not too bad in my opinion. I forget the cost, but the new pulley came from the local Freightliner dealer.
I don't usually call Napa but I did on that occasion and seems like it was about $40 there, so I bought one and it has been working great!
