Spindle rapid advances beyond setting of advance rapid travel length adjustment

Probable Cause

Check

Remedy

Seal on hydraulic piston in cylinder assembly is worn or broken. Complete lack of control of spindle travel. Replace piston seal. Ref. Cylinder Assy. Bul.
Hydraulic piston section retaining ring in cylinder assembly loose or broken. Complete lack of control of spindle travel, oil leaks into drive shaft area. Replace - Ref. Cylinder Assembly Bul.
Advance plunger assembly in manifold sticks due to defective "O" rings. Plunger movement should follow lever movement. Replace "O" ring or complete assembly. Ref. Manifold Assembly Bul.
Oil too heavy in hydraulic system. 150-200 S.U.S. at 100°F hydraulic oil recommended. Drain and refill.
Dirt in advance plunger valve assembly in manifold. Remove and inspect valve for dirt. Clean and reinstall. Ref. Manifold Assembly Bul.