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Lonnie, if you look at the photos in post #18 in this thread, you will see that i did add the jack screw adjustment just like you ask about.

UPDATE: Well i just got back from a 100 mile test drive and so far the idler is working great. Now time and miles will be the real proof if this pulley is a help or not, but i do have to say i did notice a difference today. Today out side temps were right around 80, i took the truck for a drive...

dogbone, that's the funny thing about the web, i find a web site on pulleys that says my design in the right place, and you come back and say its not. I think at this point the only thing you and i are gong to agree on, is that we disagree, and leave it at that.

Doghead, after doing some research on the drive side and the slack side of the belts it looks like you were mistaken. I do have the idler mounted on the slack side. Please see diagram. looking from the front of the engine, D1 in the diagram being the water pump and D2 being the fuel pump and...

Tow4, thanks for the complement, i have been doing custom machine work for most of my adult life, it kind of helps having a complete machine shop at your home.

Well, some members were concerned that my idler lacked strength since it was being mounted on the drive side of the belt. So i went back and made some changes, I added a jack screw adjustment piece made out of 1 1/4" X 1 1/4" X 1/4" angle iron so now the mount is good and firm. Please take a...

doghead I understand this may not be the best place to mount this but like we always say, every thing on these trucks came from the lowest bidder, and Cummins design on how to adjust this belt sucks! So i am just trying to come up with a fix for their poor design, but if you would like to help...

Ord22 To address your question of a dow pin, no there is no dow pin. The bolt is threaded into the front cover and on top of that i added a lock nut onto the back of the bolt to make sure it doesn't come lose. Now if it did come lose the belt would push it up out of the way so it wouldn't cause...

Juanprado, the bearing is a factory piece from a late model Hyundai and as i said in the thread it was a left over from my daughter in laws car, but the mounting bracket is all mine. I have been doing custom fab work for years and have a full machine shop at my home so i just took some...

Goldeneagle, just the one bolt, no spring, all you have to do is just rotate the idler down into contact with the belt and tighten the bolt, easy as can be. I added the extra lock nut on the end of the bolt just to be sure that it doesn't come lose. As far as selling them i hadn't even though...

Well, as we all know when you go to tighten your water pump belt on the Cummins 250 you always run the chance of a water pump leak when your done. Since i needed to tighten my water pump belt i spent some time today looking at the front on my engine looking for a better way to do this job. I...