How to Perform Accumulator Charging/Discharging for JCB 3CX,4CX

This instruction show you guide on how to charge and discharge accumulator for JCB 3CX, 4CX, 214e, 214, 215,217 & VARIANTS Backhoe Loader.

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Charging

1 Park the machine on level ground, lower the loader arms, switch off the engine and chock all four wheels. Release all hydraulic pressure in the accumulator by selecting the starter key to the ON position without the engine running, SRS ON and operating the loader arm hydraulic lever.

 

2 Remove gas valve guard A and gas valve cap B.

3 Screw T handle C all the way out (counter clockwise) before attaching charging tool (service tool 892/00948) to accumulator gas valve.

 

4 Close bleed valve D.

 

5 Making sure not to loop or twist the hose, connect the charging tool to the gas valve. Tighten to 1.0 lbf ft (1.36 Nm, 0.14 kgf m).

 

6 Connect charging tool to a bottle of compressed nitrogen gas.

 

7 Screw T handle C all the way in (clockwise), this will depress the core in the gas valve. Check charge pressure which should be set to suit the loader and the attachment fitted to the machine. For recommended charge pressures refer to Technical Data – Smooth Ride System.

 

8 If charge pressure is low, carefully open hand valve E on the nitrogen bottle and SLOWLY fill the accumulator. Close valve E when the required charge pressure is reached on the gauge.

 

9 Let the pressure settle for 10 to 15 minutes. This will allow the gas temperature to stabilise. If the charge pressure is exceeded, with the gas bottle closed, open bleed valve D. Reduce pressure as required, then close bleed valve.

 

CAUTION

To reduce pressure use the recommended charging tool or the charge valve could be damaged which may result in rapid discharge of the accumulator.

 

10 When complete screw T handle C all the way out (counter clockwise) then open the bled valve D to vent the hose.

11 Hold the gas valve to keep from turning, loosen nut and remove charging tool.

12 Refit gas valve cap and valve guard.

 

Discharging

1 Park the machine on level ground, lower the loader arms, switch off the engine and chock all four wheels.

Release all hydraulic pressure in the accumulator by selecting the starter key to the ON position without the engine running, SRS ON and operating the loader arm hydraulic lever.

 

2 Remove gas valve guard A and gas valve cap B.

 

3 Screw T handle C all the way out (counter clockwise) before attaching charging tool (service tool 892/00948) to accumulator gas valve.

 

4 Close bleed valve D.

 

5 Either connect charging tool to a bottle of compressed nitrogen gas which is turned off or remove hose F and fit a suitable blank on charging tool.

 

6 Screw T handle C all the way in (clockwise), this will depress the core in the gas valve.

 

7 Open bleed valve D until all the gas charge is relieved from the accumulator. Remove the charging tool.