Clutch assembly

Checking for flywheel runout.

The clutch that we were inspecting was off a toyota 3k engine. It is the cable operated type.
After un doing the cable, and un doing the bell housing bolts, we were able to remove the transmission. After the tranny  was removed, we were able to remove the pressure plate bolts and then remove the pressure plate and the clutch plate. After we removed these, we were able to inspect and measure the components.
The face of the pressure plate was in good condition.
The clutch plate was fairly worn and would need replacing.
the release bearing was fairly worn and would need replacing.
The release fork was in good condition.
The release linkage was in good condition.
The spigot bearing was in good condition.
The clutch housing was in good condition.
The input shaft was in good condition.

A clutch friction plate.

The flywheel face was in good condition, but after checking for flywheel runout, we found there was .05mm of runout. However, this amount is acceptable because the specification is .15mm.
If the clutch plate was worn down to the rivots, the rivots would then score the face of the flywheel and pressure plate which will cause excessive damage.
We then had to identify which way the clutch plate goes in on re-assembly.
We concluded that the raised side of the plate goes against the pressure plate.

A clutch assembly.

when putting the clutch and pressure plate back in, we used a dummy shaft to align the clutch plate while we bolted the pressure plate to the flywheel. Once the clutch assembly was bolted down we were able to re fit the transmission. We had to make sure that the weight of the tranny was not hanging on the clutch assembly while we were bolting it to the engine.
We then had to fit the clutch cable and adjust it correctly with the correct amount of free play. If there was not enough freeplay, the release bearing would be constantly pressing against the diaphragm fingers and cause and excessive amount of damage. Also riding the clutch will cause an excessive amount of heat and wear to the clutch plate.

A flywheel

A pressure plate.

we adjusted the clutch linkage accordingly and checked operation and it all worked fine.