AR-M 355 weird paper exiting issue

[vincent64]

We have this ARM 355 in the shop, trying to get it cleaned up and ready to go out, yes, used mach.
There is no finisher on it, but does have a duplex, but that does not come into play here yet.
When paper leaves the turnover unit to the right side, it exits just fine, when switching back to the left either to exit or duplex, it does not clear the gate in the side door before it reverses direction and hits the underside of the gate.
I put a peice of white tape on the gate arm to watch its action, when paper leaves the fuser unit it flips up like its supposed to, but gets so far and when the reverse motor switches direction it hits the gate.
Have swapped motors, replaced gears in T/O unit, swapped the whole unit out, basicly swapped out anything that the paper touches in there.
I am not getting anywhere with it, never seen one do this before.
Any ides out there???

[OMD-227]

What is the jam code Vincent?

[vincent64]

What is the jam code Vincent?

The jam code is shows is AINPDN, I know what the book says, but its not even reaching the ADU gate.

[OMD-227]

Due to heat and dirt contamination, the grease applied to the POD1 actuator pivot points over time become sticky. this causes the POD1 actuator to become slow in returning once the trail edge passes. The paper length is then misjudged, resulting in a delay in the timing for the DSBM. At this point, the trail edge has gone past POD2. When the DSBM comes on to send the paper to the left side, it runs into the POD2 actuator, resulting in AINPDN jams.

If the grease is even stickier than in this case, you get POD1_S jams.

Grease in the drive section of the delivery turn over unit may also contaminate the one-way gears. This causes the paper to take longer passing POD1, although POD1 acurately judges the trail edge. This also causes AINPDN jams. Clean the grease from the one-way gears in the drive section, clean the shafts with fine sand paper, along with the pivot points of POD1,2 & 3.

[Comingapart]

remove the tension springs from the final exit idler rollers and stretch them. Putting more tension on the exit rollers.
If that helps, then you probably need to replace the exit roller shaft.

I've had new turnaround units do this out of the box.

[blackcat4866]

I too have seen bad delivery/turnover units new in the box. Another thing you might look at is the bushings in the registration assembly (paper stop unit in Sharp terminology). The registration unit can get very hard to turn. If you catch it early enough you may be able to just clean and lubricate the registration bushings. =^..^=