Agilent 110 making clicking noises after replacing pistons.

Hi

For noise, may be piston and seal are not properly lubricated with mobile phase before installing.

Check seal and piston again.

I took apart the pump head again, as before, and made sure the pistons, seals, and valves were quite damp with acetonitrile (the mobile phase that goes through that pump). I then reassembled everything but still have the same problem. I have noticed however that the clicking seems to be coming from the pump head I did not work on. The pump head I changed was the one without the purge valve. The one the clicking seems to be coming from does have the purge valve. 

Thank you for your response. 

I took apart the pump head again, as before, and made sure the pistons, seals, and valves were quite damp with acetonitrile (the mobile phase that goes through that pump). I then reassembled everything but still have the same problem. I have noticed however that the clicking seems to be coming from the pump head I did not work on. The pump head I changed was the one without the purge valve. The one the clicking seems to be coming from does have the purge valve. 

Thank you for your response. 

Okay...Check frit of purge valve...Is it okay...

After all of this restart system and computer and purge it...

I hope, it will work...