Maintenance - Greenlee 975 Manual De Instrucciones

Maintenance

Procedure for depressurizing the hydraulic system:
1. Disconnect the pump from the power source.
2. Rotate the release lever to AUTO RELEASE and
allow the ram to retract fully.
3. Disconnect the hose slowly to release any
trapped pressure.
Every time the pump is used
• Check the oil reservoir level. The oil level should be
approximately 25 mm (1 inch) from the top of the res-
ervoir. If the oil level is low, see Adding Oil.
• Examine the condition of the hose, connectors, and
O-rings for deterioration, wear, or other damage.
Replace any missing or damaged components.
• Check the condition of all electrical cords, plugs, and
connectors.
• Listen for unusual noises and observe the operation
of the pump for changes in performance. Either situ-
ation may indicate that maintenance or repairs are
necessary.
Periodically
• Examine the hydraulic oil for changes in color
or viscosity, and the presence of dirt or other
contamination.
• Occasionally check oil temperature after pump is
operated. The recommended operating temperature is
38 °C to 50 °C (100 °F to 125 °F).
Cleaning
• Periodically clean the exterior of the pump and
motor. Use a vacuum cleaner to clean the ventilation
openings.
• Clean the area around the reservoir vent, and be sure
the vent breather hole is open.
• Keep all hose connections clean and use protective
caps or plugs when couplers are not in use.
Greenlee Tools, Inc.
975 Hydraulic Power Pump
Oil Condition
Visual inspection of the oil may be used as a guide
to determine the need to replace the oil. A change in
appearance, such as darkening or thickening, will indi-
cate a need for replacement. The continued use of oil
after it should be replaced will cause accelerated wear
of system components and will void the warranty.
Adding Oil
Do not use brake fluid. Brake fluid will ruin the seals.
1. Place control lever in AUTO RELEASE position.
2. Unplug the electrical cord from the power source.
3. Thoroughly clean the area around the fill hole.
4. Remove the vented reservoir plug.
5. Use Greenlee hydraulic fluid or an equivalent high-
grade light hydraulic oil. See the "Parts List" section
of this manual for Greenlee hydraulic oil specifica-
tion and Greenlee part number.
6. Pour the oil through a clean funnel with filter screen.
7. Add oil until oil level is 25 mm (1 inch) from the top
of the reservoir cover.
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