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Mine does this too sometimes. Lift up the head and look in the middle of the oil pan. The knee controller runs through there. Make sure the black knob is not stuck. Hit the knee thing a couple of times to make sure it is not stuck. It should move freely up and down. That may fix the problem. If not, look st the small post to the left and behind the oil intake. Move the manual presserfoot lever on the machine to see it move. It will be stiff, but it should still lift a little. Usually jigging these two parts will fix the problem. Good luck..
Try ez test to check for proper operation. Remove nails and air supply, point nose of gun up then down again. The driver should not move from the top of cylinder position. If driver is moving up then down replace the driver oring. If driver oring seems ok then connect air supply and bump fire the nailer without nails against soft wood and door open so that you can see the driver and feeder moving. Bump fire the gun and make sure that the driver is moving all the way back up to top of cylinder and the feeder is moving rapidly back and forward. If movement seems ok then hold the nose down on soft wood and depress and hold the trigger. This will fire the gun but driver will stay at the bottom position and not return until you release the trigger or lift the gun. When holding the gun with the driver down position, no air should leak out the top or bottom of the gun. If air leaks out bottom, replace lower bumper, if air leaks out the top replace the upper bumper. Good luck
Error 45 means the lift moving in wrong direction.The lift control system has detected that the lift is moving in the opposite direction of the issued lift command. There are two possible causes they are,
1- Lift Motor hysteresis.
This error would typically happen when the lift was already in motion (typically downward) when a lift command in the opposite direction (lift up) was issued. Some motors exhibited a very long turn around time and the lift motor would still be moving in the original direction (downward) while the control system was attempting to move the lift in the opposite direction. If the error 45 condition is persistent, replace the lift motor.
2 - Bad lower PCA
This is a very rare condition, if the lift moves in the opposite direction of the issued lift
Annoying solution, but works every time. Remove the ENTIRE bobbin casing from the base and then turn the wheel. The needle should lift right out. Reassemble bobbin casing and oil very well.
This generally only happens when you are sewing through several layers of fabric or though a thick fabric. If you are doing neither, the timing in your machine may be off and you will need to get it repaired.
You need to remove covers, manually move the carriage in home position, manually rotate gears to put scanner in home position, clean gears, use wd40 to neutrallize grease, ink, dust on clutches and gears,...
or replace: - PR lift shaft - Sheet feed unit - Main Board ***'y - Carriage lift sensor unit
when you dissconnected the hoses did you turn the cylinder upside down and let it drain cause some hydraulic lift assybelies have a small chamber in the head of them that retain fluid and with out removing the fluid it will do a hydraulic lock and wont be able to move untill you losen the bleeder screw if it has one ok please let me know how this goes for you
Remove power from the opener. Then, pull the red release rope and manually lift open the door. It should move with little effort. Next, pull the door halfway down and let go. The door should stay where you left it. If it fails either test, the door lift springs need replacement or adjustment. If it works ok, follow the proceedure in the owners manual for adjusting the up and down limit sensors, and the emergency reverse adjustment.