HP designjet l65500 Manuale Di Servizio

 Troubleshooting

197

6.

Apply pressure to the valve to check if the spindle is sealing correctly the pressure chamber. 

7.

If the air leakage remains, replace the spindle. 

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For the future parts the sealing has been improved, with the addition of a Teflon part to ensure that 

there is no air leakage from the thread of the valve + better control of the force applied when 

screwing the valve. The old valves need to be replaced in case of air leakage. 

•

Also, we are in the process to setup a support part with the air valve only. 

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To replace the valve perform the following

1.

Use a Double Hex driver or a wrench key of size metric 11 to unscrew the valve.

2.

In some cases, by greasing the inner O-ring, this can fix the air leakage. 

3.

If the air leakage from the air valve cannot be fixed, and that the support part of the air valve is not 

available, replace the complete spindle. 

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