Greenlee 7804SB Quick Draw Betriebsanleitung, Kundendienst Und Ersatzteile Seite 14

Troubleshooting (cont'd)
PROBLEM
Will not return piston.
External oil leaks.
Greenlee Textron / Subsidiary of Textron Inc.
7804SB/7806SB Hydraulic Punch Driver
PROBABLE CAUSE
Weak or damaged return spring,
excess oil in unit.
Damaged seals or surfaces.
See Piston Travel Inspection.
Damaged piston, piston extension,
pump plunger seals or mating surfaces.
See Maintenance and Repairs, Cylinder
and Pump Block sections.
Damaged Release Valve Stem seal.
See Inspection and Adjustment,
Release Valve Inspection.
14 4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
POSSIBLE REMEDY