Front crank dampener for a 8070

AGCO doesn't have them ?? isn't there a brand name stamped on your old one ??

I'd heard the 8050 and smaller rubber damper wasn't available, but had not heard the fluid damper to the 7080/8070 wasn't as well.

Fliudamper's 4-71 DDA appears to have same demensions. I never chased the specific measurements as I found a NOS in WA. Worth investigating if they're priced similar to their other products. Both my original and replacement have names stamped (different) and neither are found by google.

Thanks everyone. Gives me some rabbit trails. Ill see which one get me there. Ill post when I find a solution. Might help someone else

I talked to Dale Mfg. They only do the other style. He did tell me what happens to fliud damper is the fluid wears out and the inner weight binds so it stops functioning. I have found a NOS ill be good on this tractor. I do thank everyone for their help

Im not sure but im becoming convinced that a damper off a 71 series detroit is the same thing
In time I will find out for sure and iI will post it for sure

Reliance is showing the part on their website and Jen sales (which just resells Reliance parts?).

just under $1200...

This is a new one from Allis. There is one that goes on a 71 series detroit that appears to be the same as the ones on the allis engines. When I get the old one off Im going to find one from the detriots and find out. Ive got another 8070 that needs the engine built so ill neef another one

I think you are right Ed

Original on 85 8070 was Stahl. Replacement is Metaldyne. 83 8070 has a Hydraulics Houdaille. Seems to have been a few vendors. Be nice if there was a way to test one for "good" or not. Don't think thers a method.

Edited by SteveM C/IL - 31 Jan 2023 at 11:34am

Many years ago, I had two bad ones on a 7580 and 7080 within 6 months of each other. On each tractor, if you ran the RPM's at 2500 to 2600 there was an awful rattling in the front end of the engine, like timing gears were bad. Above 2600 or below 2500 the noise completely went away. Both tractors had welded A/C and alternator brackets, so this had been going on for a while. Removed the old damper the noise was still the same. Installed a new damper and the noise was GONE. We got the 7580 with the engine locked up because the oil pump mounting bracket was broken allowing the oil pump to disengage the drive gear from the crankshaft gear. Repaired the engine and reused the old damper (we'd never heard it run before) and had this terrible noise at that 2500-2600 range. Finally figured out what broke the oil pump mtg bracket was the same thing that broke the A/C and alternator brackets...a bad fluid damper.

If it is indeed the same as the Detroit Damper, I can get new ones from Interstate McBee. Well, they're currently out of stock though. So AGCO not having them might not be a problem lol! 5177763 is the Detroit number I've researched some. I would like to put one on my 210 puller and get the original one off. 

Edited by injpumpEd - 01 Feb 2023 at 7:28am

This is the one I plan to use on our 8050 that will be getting a counterbalanced crank. It's a 6-71 detroit balancer. Bolts right up. 12 3/8" in diameter. Based on my measurements, it "should" clear everything.

Can you spin test a fluid balancer? I am using a orange color balancer on pulling tractor. Think from N5 Gleaner.

Cannot spin test a harmonic damper. It controls harmonic vibrations as they occur at certain engine speeds and loads. Not like balancing a tire. Any engines crankshaft rotates in pulses from compression strokes to firing strokes, etc,etc. So, the floating donut ring inside the fluid damper is suspended in a silicone fluid that allows the donut to start/stop continuously as the outer shell rotates to control harmonic vibrations. Rubber dampers do the same thing. When the silicone gets old and stiff, or leaks out, the damper is ineffective.

Edited by DrAllis - 03 Feb 2023 at 5:51am