Maintenance - Textron Greenlee 976-22 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
reservoir. If the oil level is low, refer to "Adding Oil" in
this section of the manual.
• 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
situation 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 contamina-
tion.
• Occasionally check the oil temperature after the 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. Use protective caps
or plugs when couplers are not in use.
Greenlee / A Textron Company
976-22 and 980-22 Hydraulic Power Pumps
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, indicates
a need for replacement. The continued use of oil after it
should be replaced causes accelerated wear of system
components and voids the warranty.
Adding Oil
Do not use brake fluid. Brake fluid will ruin the seals.
1. Place the control lever in the 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. Refer to the "Specifications"
section of this manual to determine the correct type
of hydraulic oil.
6. Pour the oil through a clean funnel with a filter
screen.
7. Add oil until the oil level is 25 mm (1 inch) from the
top of the reservoir cover.
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