Maintenance - Greenlee Quick Draw 7804SB Service Manual

Maintenance

Maintenance and repairs should be performed in a dust-
free area by qualified technicians.
This unit requires minimum maintenance because it
has a closed hydraulic system and all internal parts
are lubricated by the hydraulic fluid. Lubricate lever pins
lightly. Keep contaminants away from the ram and
cylinder. Store with the lever down and hydraulic
pressure released.
Adding Hydraulic Oil
1. Place the driver in a vise in a vertical position with
the handles up. Unscrew the reservoir handle and
remove the bladder plug. Open the release valve
knob to assure the ram is fully extended.
2. Fill the rubber bladder to the point of overflow with
Greenlee hydraulic oil.
3. Purge air from the system:
Pump the lever handle several times to remove air
from the pumping chamber. Close the release valve
knob and pump the lever handle until the ram
completes its full travel. Repeat as necessary.
Note: Open the release valve knob slowly so the
ram extends slowly. Rapid return of oil and air may
cause the oil to overflow the rubber bladder.
If this procedure fails to remove air, remove the
bladder plug and open the release valve knob. Place
thumb over the plug hole in the bladder and squeeze
the bladder while pumping the lever handle several
times. Close the release valve knob and pump the
lever handle until the ram completes its full travel.
Repeat as necessary.
If this procedure does not remove air, remove the
plunger (24) and fill the plunger cavity with clean oil
as described in the "Reassembly" section of this
manual.
4. Fill the rubber bladder to the point of overflow and
replace the bladder plug. Wipe the bladder clean of
excess oil and reassemble the reservoir handle.
Greenlee Textron / Subsidiary of Textron Inc.
®
Quick Draw Hydraulic Punch Drivers
Lever Handle
Oil Leaks
• Check for external oil leaks.
• Check that the release valve knob and stem are
closed tightly and seating properly.
• Remove the reservoir handle and check for oil leaks
around the rubber bladder and bladder plug.
4
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815/397-7070
Reservoir Handle
Bladder Plug
Rubber Bladder
Release Valve Knob