Vibration Dampener

Is it the outer section wobbling on the inner or is the whole thing wobbling? I have installed a lot of those speedy sleeves and never had one try to ride up as you suggested. The damper hub should have pushed the sleevein furthur. I also think if it would rode up on the sleeve the hub would have broke when torqueing the bolt in the end. If the outer section is wobbling a little on the inside don't be alarmed. I've seen a lot of new ones do that on the older rubber style damper.

Mark
I had a concern about the damper on the 3406B in my truck, so I talked to the service dept at Milton Cat. Both the service manager and one of the truck engine mechanics said that as long as the two marks on the damper, one on the inner hub and one on the outer ring, stay lined up, the damper is OK. Cat allows for 80 thousands runout on the outer ring before recommending replacement. they told me even if it wobbles, it is OK, but to "keep an eye on it" Made me feel real comfortable. That was 4 or 5 years ago, and it is still OK. I don't know if the same is true for your D333, but it probably is. The new style for mine is one piece, without the rubber ring inbetween. If you have an engine service manual it should be listed in the specification section.

George

Thanks for the answers. The "wobbling" is certainly visible and I do not have a manual on this engine, yet. Is the runout 80 thousandths? Not sure yet. Need to dial indicate it first. But that is a lot. For some reason the 14K 120 grader service manual is not available? So I'll have to get one just for the engine. But it's ONLY the outer ring that seems to be moving (of course). I checked the inner ring for movement and it is running true. As a licensed Marine Engineer I know fully what the purpose of the dampener is. It's just that in the course of my work and training I've never run into a rubber mounted dampener for this purpose. (worked on mostly 398/399 Cat's for generators prime movers and 5 cylinder Sultzer engines for propulsion) Live and learn I guess. If anyone has a manual for the D333 engine on my 1969, 120, 14K1608 grader I would very much appreciate any tolerance info. you can provide, concerning this dampener. My 12E has a solid dampener and so does my 70D. So those manuals are no use here. I'm thinking, now after "talking" with you guys, that it may well be just fine.

So..thanks again everyone, for all the info. and help! It's much appreciated.

Usually they never give you a problem unless they come apart the they need replacing. The old D386-D397 V-12 engines & the V-8 versions (D375-364) they had a fluid filled damper on them but you had to be careful not to distort or dent the surface in on them & they lasted forever it seemed.

The rubber vibration dampeners often get a wobble to them, but I've never seen any specs on runout for them.
The problem is, they are a 'cheapie' dampener, with the two sections just pressed together, with the rubber section compressed between them.
They can come loose, and fall off .. and oil dripping on them, is their worst enemy.The oil softens and lubricates the rubber, and heat adds to the problems.
If the wobble worries you greatly, you could always remove it, place it in a shop press, and apply pressure in the right area, to re-align the outer section with the inner section. Its likely that the two sections have not been properly pressed together from the factory, but if its new, you should not have any problems.