Eccentric Shaft

Thoroughly clean eccentric shaft in a suitable cleaning solution and blow out oil passages with compressed air. Inspect shaft for scratching or scoring of bearing journals and possible blocked oil passages.
Check rotor bearing clearance by measuring inner diameter of the rotor bearing and outer diameter of the eccentric shaft rotor journal. Clearance should be 0.0016 - 0.0031" (0.04 - 0.08 mm). Replace the bearing if clearance exceeds 0.0039" (0.10 mm). Replace eccentric shaft if journal diameters are under specified limits.
Place eccentric shaft in two "V" blocks. Mount a dial indicator and check runout of both ends by rotating shaft slowly. If runout exceeds 0.0024" (0.06 mm), replace shaft.
Oil passages in eccentric shaft are sealed by a blind plug in rear of shaft. Inspect plug for possible oil leakage. If leakage is detected, remove plug with an Allen wrench and install new "O" ring. Tighten plug.
Inspect needle bearings in end of shaft for wear or damage. Check for spring weakness, stuck, or damaged steel ball at the oil jets. Inspect front needle bearing, bearing housing, and thrust plate for wear or damage. Inspect front and rear oil seals for leaks, replace as necessary.