Early TC Issues?
Seasoned HDF Member
Joined: Mar 2010
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From: Honah Lee
I suppose the runout could be caused by poor manufacturing, but I would hope that Harley keeps the tolerances pretty tight for new cranks. The allowable in the S&S instructions is .003". For us end users, the main thing to know is that if the crank does twist, it's easiest to check for it by checking the runout. If it runs with a lot of runout it will quickly chew up that bronze bushing you see in the cam plate. Once that wallows out, the oil pump is next to go, resulting in low oil pressure.
That's why an oil pressure gage is high on my upgrade list...the more I study up, it seems that most internal problems on our TC's can be caught early by looking for a change in the way the oil pressure behaves.
That's why an oil pressure gage is high on my upgrade list...the more I study up, it seems that most internal problems on our TC's can be caught early by looking for a change in the way the oil pressure behaves.
Once they went away from the gear drive system on EVO that required them to true the cranks (by a bending process) they went to the chain drive. This is very forgiving in runout requirements. The cranks are simple pressed together. The can be out .012 at the sprocket end. The oil pump drive closer up has a loose fitting D drive from a flat milled on the crank. One reason the pump is centered with tapered pins and not doweled.
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Tourer
Joined: Feb 2016
Posts: 309
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From: Southlake Texas
Once they went away from the gear drive system on EVO that required them to true the cranks (by a bending process) they went to the chain drive. This is very forgiving in runout requirements. The cranks are simple pressed together. The can be out .012 at the sprocket end. The oil pump drive closer up has a loose fitting D drive from a flat milled on the crank. One reason the pump is centered with tapered pins and not doweled.
Road Master
Joined: Jun 2013
Posts: 1,181
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From: north of the south pole
Even early TC's (pre 03) have cranks that get out of whack. Just not as many.
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