Answer) You have to wipe the sediment out of the sheave cavities, before and after cleaning. If available, use compressed air to blow the sediment out, then wipe the cavities. If available, use brake cleaner spray, then wipe the cavities.
IF you put the parts in a dishwashing machine, THEN do not use dish washing liquid detergent. There are detergents that when mixed with water, the alkali makes a caustic solution that dissolves the aluminum's surface - this is called "Etching".
Depending on how clean you have the surfaces free from oil/residue, the washing procedure when done may leave a dull white finish on the clutch. The sheaves may have to be re-polished.
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Maintenance - Worn primary clutch splines?
Question) I have worn governor cup splines. I installed new torque buttons in the governor cup but not new button springs. Could the springs under the torque buttons wear out? The splines are wore enough to rotate ever so slightly. What do you think?
Answer)With clutch disassembled take the governor cup and install it back on the fixed sheave. With a dial indicator place the button on the head of the clicker bolt. With one hand rotate the governor cup back and forth, the maximum freeplay is .020 inches. IF more than .020", THEN replace the governor cup.
Another detail to remember is that the spring cup cover only touches the governor cup from engagement rpms or lower. Once past engagement rpms then the sliding sheave moves away, the spring cover moves away from the governor cup towards the engine.
Check bushing fitness for sure.
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