D020 - Check the pressure accumulator
Orientation
A pressure accumulator consists of two chambers, a liquid and a gas section with a
membrane as a separator. The liquid section is connected to the hydraulic circuit, so
that the bubble reservoir is filled when the pressure rises, thereby compressing the
gas. When the pressure drops, the compressed gas expands and displaces the
stored pressurized liquid into the circulation. This ensures that the pressure level is
maintained during load changes or temporary higher loads.
Screws on the hydraulic system, the connected components, and the
supply lines must be tightened to the manufacturer's specified
torques.
Procedure
1. Check the pressure accumulator. With the machine powered on (not during the
program or continuous run), slowly open the accumulator drain valve on the
hydraulic fluid tank and watch the needle on the system pressure gauge.
The pressure gauge needle slowly falls to a point where it quickly drops to zero.
This point is the approximate accumulator bias tension. This value is 50 +/-2
bar. If this value is below 40 bar, the pressure accumulator must be
replaced.
Maintenance Summary - 4.000 Operating hours
71
Maintenance Instructions
C200
LP1702.10021 - 05.06.2019
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