Cummins Automatic Belt Tensioner

[Schrimscher]

I have a 2002 Diplomat 40DST with a Cummins 330 engine. I'd like to check the automatic belt tensioner for tension, clearance, etc. I have the Cummins manual, but some of you guys have the experience of actually doing this. Your advice has always served me well and saved time and frustration. Any pointers or tips would be appreciated to save my knuckles and back. Thanks in advace.
Paul

[deSanford]

See if you have a "hatch" cover in the rear of your MH. part of mine is in the rear closet. Through this hatch you may be able to do or see what you need to see. I'm sure others here will be able to help you with the belt tension er.

[Robi.1014]

What I can add to what you see in the manual?.....is that to check for tensioner pulley wobble is to remove the belt. Ugh. And inspecting the tensioner for stress cracks or evidence that (with the belt on) the tensioner has been bumping-up to one of its two stops each requires an unobstructed straight-on view. On my rig, a "straight-on view" can only be obtained when my radiator is removed (a task I had to do this last fall). My Cummins manual doesn't give a torque value that can be tested when removing the old belt and installing a new one. All I can add is that if your belt is the original belt, replace it now. My OEM belt at 7 years and 50,000 looked really good (minimal cracks across the belt; no elongated cracking).