Eccentric Shaft

Fig. 27 Eccentric Shaft & Related Components:

1. Check the shaft for cracks, scratches, wear or any damage. Be sure that the oil passages are open.
2. Check the shaft for run out. To check, mount the shaft on V-blocks and install a dial indicator. Slowly rotate the shaft and note the reading on the indicator. If the run out is more than 0.0047 in. (.12mm), replace the shaft with a new one.
3. Check the blind plug in the shaft end for oil leakage or looseness. If any oil leakage is found, remove the blind plug with a hexagonal Allen key and replace the O-ring, Fig. 27.
4. The oil jets are installed in the eccentric shaft. The oil jets open when engine speed increases and oil pressure rises. Check for spring weakness, sticking or damage of the steel ball.