How To Check And Adjust Accumulator Gas Pressure

How to check and adjust accumulator Gas Pressure of hydraulic breaker?

--Check accumulator gas pressure every 500 hours of operation.

▲CAUTION!

The accumulator is charged with nitrogen (N²) – a non-explosive inert gas. Use only N² when

refilling it. Charging it with any other gas could trigger an explosion and lead to serious or possibly

fatal injuries.

IMPORTANT! 

1.Incorrect nitrogen gas pressure in the accumulator can damage the breaker and cause

poor or erratic breaker behavior.

2.Hydraulic oil pressure MUST be fully vented inside the breaker before charging

the accumulator. Residual pressure will result in an incorrect N2 charge pressure.

How to check accumulator gas pressure ?

1)  Make sure if the cap and valve of the 3-way valve assembly (5) are fully tightened.

2)  Remove the cap (11) from the accumulator and tighten the charging valve (12) fully.

3)  Check if O-rings (6&8) are installed to the bushing (7). Remove the plug (9) and screw the

bushing.

4)  Install the bushing (7) to the 3-way valve assembly (5).

5)  Loosen the charging valve (12) gradually. The charging pressure is indicated on the pressure

gauge.

6)  Close the valve clockwise when the gas pressure is normal. If the gas pressure is higher, repeat

loosening and tightening the relief valve of 3-way valve assembly. The pressure is lowered

gradually.

7)  Loosen the relief valve of the 3-way valve assembly to discharge the N2 gas in the 3-way valve

assembly (5).

8)  Remove the 3-way valve assembly (5) and tighten the plug (9) and cap (11).

IMPORTANT!

To determine the correct pressure in relation to ambient temperatures, refer to the below table.

Conversion Table for charging nitrogen gas pressure to Accumulator

How to adjust accumulator gas pressure?

1)     Connect the charging hose (4) to N2 gas cylinder (1) after screwing the bombe adapter (3) onto adapter, nut (2) and installing to the N2 gas cylinder.

2)     Connect the 3-way valve assembly (5) to the charging hose (4) after unscrewing the cap on the

3-way valve assembly.

3)     Remove the cap (11) form the accumulator and tighten the charging valve (12) fully.

4)     Check if O-rings (6&8) are installed to the bushing (7). Remove the plug (9) and screw the bushing.

5)     Loosen the accumulator charging valve (12) after checking if bushing (7) is installed to the 3-way valve assembly.

6)     Turn the handle of the N2 gas cylinder counter clockwise slowly to charge gas.

7)     Charge gas in accordance with the conversion table for charging N2 gas pressure to accumulator.

8)     Turn the handle of the N2 gas cylinder clockwise to close the cock.

9)     Close the accumulator charging valve (12).

10)   Loosen the relief valve of the 3-way valve assembly to discharge the N2 gas remaining in the charging hose.

11)   Remove the charging hose, 3-way valve assembly and bushing and tighten the plug (9) and cap (11).