Accumulator "Glide Ride" Parker - Case 580SR Service Manual

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ACCUMULATOR "GLIDE RIDE" PARKER

Technical specifications
Capacity (gas) ...........................................................................................................................................2 litres
Capacity (oil) ........................................................................................................................................1.84 litres
Precharge............................................................................................................................................ 30 ± 1 bar
Maintenance
Z Check the gas pre-charge pressure regularly during the first few weeks of operation, and then at suitable in-
tervals afterwards based on this initial experience.
Z Carry out a visual examination of the accumulator periodically in order to detect any early signs of deteriora-
tion such as corrosion, deformation etc.
Z Comply with the regulatory provisions concerning the monitoring of operational equipment.
Z Before removal, it is vital to ensure that there is no residual hydraulic pressure in the accumulator. Discharge
the gas side of the accumulator using a Parker UCA charging and gauging assembly before carrying out any
maintenance operations.
Safety
Charging must be carried out by qualified personnel.
Before taking any readings or pressurizing with nitrogen, the accumulator must be isolated from the hydraulic
system and the fluid side discharged in order to depressurize it.
Use only nitrogen (N2) to pressurize the accumulator.
Danger of Explosion - Never Charge with Oxygen
The types of nitrogen permitted are: type S (99.8% pure); type R (99.99% pure); type U (99.993% pure).
If the pressure of the gas contained in the nitrogen bottle is greater than the maximum permissible operating
pressure of the accumulator, a pressure regulator must be fitted to the nitrogen bottle.
Parker recommends that the precharge should be checked during the first week following commissioning of
the system.
Thereafter, it should be checked every three months, or at intervals determined by the Manufacturer.
The Effect of Temperature on Precharge Pressure
In order to compensate for the difference in pressure at ambient and operating temperatures, it is recommend-
ed that the precharge pressure p
the correction factor equations and relevant table.
Warning - Stabilization
The process of charging or discharging an accumulator with nitrogen causes a temperature change which is
transmitted to the surrounding air as the temperature of the accumulator stabilizes. To allow for the effects of
temperature transfer, the accumulator should be allowed to stand for a minimum of 15 minutes before a final
reading of the precharge pressure is taken.
SECTION 35 - HYDRAULIC SYSTEM
should be adjusted to reflect the operating temperature of the system, using
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