HP LaserJet 42X0/43X0 -- Delivery Assembly & Duplexing Pendulum Assembly Removal

The gearing in these two units tends to get fouled with debris when a swing plate has worn badly. The assemblies are easily removed for a proper gear cleaning.

All that's holding the delivery assembly in place is a single swing-latch bearing at its right side. Here's a view of it.

And here's the bearing unlatched and on its way out.

With that bearing removed, the right side of the delivery assembly can be lifted, and the assembly can be shifted rightward to free it from the left side vertical frame member. (There's a small sensor cable at the right side that has to be freed from a slot.)

The duplexing pendulum is fastened by two M3x8mm washerhead screws. It comes out easily, but it's one of those parts that can be disorienting when you go to reinstall it. Here's a view of it in the machine with the delivery assembly removed.


There's no need to grease any of the gears, just apply WD-40 to their spindles.

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