Erratic feed rate

Probable Cause

Check

Remedy

Air in hydraulic system. Check for leaks. Reseal leaking area or return to factory for repair.
Advance plunger valve assembly in manifold not closing. Foreign material fouling valve. Clean - Ref. Manifold Bul.
Valve worn. Replace assembly. Ref. Manifold Assy. Bul.
Advance cam bar worn. Check. Replace - Ref. Cam Bar Bul.