Damper Pulley Rebuild

[jacktreml]

Where can I go to get a Crankshaft/Damper Pulley rebuilt for a tractor?

 

[Mule Meat]

I have never heard of anyone that rebuilds dampers for any engine.. All of the ones I have saw that went bad was either replaced by a new one or one from a salvage yard.

 

[used red MN]

Where can I go to get a Crankshaft/Damper Pulley rebuilt for a tractor?

Do a web search for “harmonic balancer rebuilder”… damperdudes is one, they are in CA. Steelerubber is another in NC.

 

[John P.]

I have used Damper Doctor in California for 4 dampers now.

 

[caterpillar guy]

How do you rebuild a steel ring with a rubber ring all pressed over a cast or steel hub. And what do they replace just the rubber? I was told they just replace them and I've never had one go bad in all my years with engines.

 

[rustred]

far as i know the pully can slip on the rubber and throw the timing marks out. and oil all over it is not good . that's what tractor vet called Oliver's. lol.

 

[John P.]

The rubber gets old and deteriorates. I had one where the ring actually separated and fell off.

 

[kencombs]

I've had a couple of my own fail. the rubber ring is bonded to the inner and outer and somehow that bond failed letting the outer ring move. Really messed up the timing mark! A couple of customer jobs the ring came all the way off and damaged other stuff.

I think the rebuild consisted of removing all the rubber, injecting new and curing it. I think the latest involves the use of urethane rather than rubber.

 

[Janicholson]

The damper is designed to have a specific a specific harmonic (tuned) relationship with crank vibrations. Crank vibrations can fracture a crank when not limited by the correct damper. As rubber/urethane/elastomer ages it changes its vibration frequency, causing some crank failures. So new is safest if OEM rubber stuff is actually in it. Rebuilt is fine if OEM material is bonded in as well. How to guarantee that is an issue. Jim

 

[used red MN]

How do you rebuild a steel ring with a rubber ring all pressed over a cast or steel hub. And what do they replace just the rubber?

They were made by men, so apparently some people are smart enough to figure out how to repair them. I suppose that yes the rubber is replaced and reassembly involves a press of some sort and alignment fixtures. Many diesel engines have a suggested replacement interval on dampeners, mainly as a deterrent to breaking the crankshaft. You can say “I never had one go bad” but the demand or stress on engine parts keeps increasing as the hp per cubic inch keeps go up.

 

[John P.]

The place I’ve used injects it with silicone rubber.