Engine/Transmission (1998.5 - 2002) Flywheel resurface

[Iredman]

My question is how much can be shaved of the flywheel of the 5. 9? My plan is in the upcoming month to install a new S/T single disc kelar clutch and bearing ect ect, and i need to know if there are tight tollereaces on the machineing or resurfacing of the flywheel to freshen it per say? What about the install of the new pilot bearing? Do you allow about . 002 press fit or more or less? Any advice or info would be appreciated Thanks Turbine Dude.

 

[jmeehan]

I don't know about our Cummins, but when I had my Jeep fly wheel resurfaced the guy showed me the angle on the edge of the fly wheel that indicates if there's any meat left to take off.

I would think that our Cummins would have something similer to indicate how much thickness is left.

I hope one of our local experts chimes in, then we'll know for sure.

 

[Motorhead]

I work at UPS and if any place tears up clutches it is here!! I help the mechanic once in a while and I see some of the flywheels that he pulls off of our Cummins powered trucks. The area where the disc runs sometimes looks like the Grand Canyon! He says that he can turn them once then they are junk. Look in the service manual or check at the machine shop that you use and they usually have a manual that tells them the max that can be removed.

 

[South Bend Clutch]

I hope I am not too late on this reply, sorry for the delay.



YES!!!! You can resurface these flywheels and more than once.



Folks, these flywheels are meaty and have plenty of room for wear. Your hydraulics move at least an inch and the clutch plate releases approx. 1/4" (gap). Most flywheels take about 10 thousandths to clean up and if you multiply that by 3 times you are looking at 30 thousandths. Think of holding a . 030 shim when you have . 250 to work with... . Yes you can reface the flywheels. The dealer likes to sell new ones.





If you have any questions on this matter feel free to call me at:

1800-988-4345



Peter

 

[Mad Max]

Mine was turned for about $60 in conjuction w/ replacing the RIP'd OEM unit @ 33,300Miles w/... a SOUTH BEND =) Anywho, dealer & tech weren't opposed to doing it, and they quoted me $950 for a new flywheel!

:--)

 

[WadePatton]

DC says DON'T grind the flywheel.

So I dug up the service manual and believe me now and hear me later:



Section 6, Service Procedures, Flywheel--third paragraph.

Flywheel machining is not recommended. The flywheel surface is manufactured with a unique contour that would be negated by machining. However cleanup of minor flywheel scoring can be performed by hand with 180 grit emery, or with surface grinding equipment. Replace the flywheel if scoring is deeper than . 003in.

[end quote]



next paragraph begins:

"Heavy stock removal by ginding is not recommended. " (their emphasis)



Can you smell it? Wonder why normal wear doesn't "negate" the fancy flywheel. Hey, maybe this is where the "hand grind" idea came from.



Garbage. . and I thought I might find some useful info in the manual.