Appomattox/Fredericksburg, VA | Trying to help a friend with a new to him 4710. Thought it would be similar to my 6700's but not so much with the proportional valve. It seems to be unresponsive. The pressure will not drop to meet the manual pressure input. Sets rate to 15 gpa but won't drop the pressure to get there with #4 tips. I've had to replace the solution control valves on mine before but this is different. I told him to do a recal and see what that does. Anything else y'all have seen and done? Already had to replace the pressure transducer. Thanks |
4710 pressure will not drop
