6
Cleaning the short oil unit
Short oil unit 1 is fitted into socket-head screw 2 on the lower
side of the engine. Insert an Allen key into the socket and un-
screw the oil drain screw.
Remove the oil unit, thoroughly clean its components and blow
them with low-pressure compressed air. Check the O-rings for
damage and if necessary replace them.
Replace the oil unit with the screw and tighten the latter to 10
N·m.
Cleaning the long oil unit
The long oil unit is fitted into hexagonal-head screw 3 next to the
engine number. Remove the screw with the oil unit, thoroughly
clean the components and blow them with low-pressure com-
pressed air. Check the O-rings for damage and if necessary re-
place them.
Fit long oil unit 4 using a 300 mm spanner as shown in the fig-
ure, then insert the spanner through the opening in the hole on
the opposite side of the crankcase. Push the oil unit into the
crankcase until it stops and remove the spanner. Refit screw 3
and tighten to 15 N·m.
The oil unit is fitted at an angle (see figure). To avoid mal-
functions, be sure to observe this position.
Workshop manual RR 4T - 400 - 450 - 525
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