Oil Supply And Cleaning - Ricoh FT4430 Service Manual

OIL SUPPLY AND CLEANING

Silicone oil is applied to the hot roller to help prevent toner and paper from
sticking to the hot roller, to reduce paper curl, and to assist roller cleaning.
A small one-way valve moves the oil from the oil tank [A] (capacity 580 cc) to
the oil sump [B]. The oil pump lever [C] alternately presses and releases the
rubber sleeve [D] between the valves as the oil cam [E] turns.
The felt wick soaks up oil and supplies it to the top of the oil supply pad [F].
The oil supply pad then applies the oil to the hot roller as it turns. The oil
blade spreads and levels the oil on the hot roller. Excess oil flows along the
blade toward the ends of the roller. At the ends, oil skimmers scrape off the
excess oil and return it to the oil sump. Oil flows out through a hole in the
bottom of the oil sump and returns to the oil tank.
The oil supply pad both distributes oil to the hot roller and removes toner and
foreign matter from the hot roller surface.
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16 April '88