Corghi EM8540 - Spin Unit; Replacing the Electrical Actuator; Replacing the Friction Roller

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• Extract the piston (C);
•
Replace the O-ring (A) with a new one;
•
Undo the nut securing the piston to the rod;
• Replace the piston (C) with a new one;
• If necessary, also replace the rod guide (D);
• Refit all parts in reverse order.
SPIN UNIT
Replacing the electrical actuator
- Disconnect the power
and actuator signal cable
(brush mount side);
- Remove the two caps
on the side panel next
to the spin unit;
- Screw a 5 x 50 bolt into
the cylindrical stud (A);
- Extract the cylindrical
stud;
- Unscrew the two actuator
fulcrum screws (B);
- Remove the electrical
actuator;
- Check that the rear
block of the new
actuator (C) is located
27 mm away from the stop (D);
- Fit the new actuator, positioning its various components in the sequence shown in the figure.
- Apply medium strength threadlocker (loctite243) to the two fulcrum screws (B) and
screw them onto the actuator.
- Fit the cylindrical stud (A).
- Close the weight-holder lid again.
Replacing the friction roller
- Remove the weight-holder lid.
- Remove the circlip (C);
- Unscrew the stud bolt (B);
- Extract the shaft and friction roller
(A);
- From the old part, recover the
other circlip and the thrust
washers, which must be mounted
in the same positions in which
they were before replacement of
the roller;
- Refit the new shaft in reverse
order, making sure that the hole in
stud bolt B is aligned with the flat
seat on the shaft.