OPERATION AND INSTALLATION MANUAL
EN-1320
5.13 Installing the Brush Block Assembly
NOTE: Only models equipped with electrothermal de-icing system.
a) Check free movement of all brushes in the assembly. Compress and release the brushes
noticing any bind or hang up inside the block.
b) Install the brush block assembly into its place on the engine gearbox. Safety all mounting
screws to each other with 0,81 mm (0.032 inch) stainless steel wire.
c) Check the brush block assembly for correct distance and angular location to the slip ring.
The distance between brush block and slip ring should be 1,2 to 2,4 mm (0.047 to 0.095 inch)
and brush block should be angled of 2 degrees from perpendicular of the copper rings,
toward the direction of slip ring rotation. See figure 5-15.
d) Check that each brush is aligned with the copper ring throughout full 360 degrees of slip ring
rotation. Refer to Figure 5-16.
e)
As necessary, reposition the brush assembly on the mounting bracket as follows:
1) Loosen two screws attaching the brush block to the mounting bracket. Refer to Figure 5-17.
2) Reposition the brush block to establish the correct distance and angular location to the
slip ring.
3) Tighten the screws and torque to1-2 Nm (9-18 inlb). Check correct distance and angle
after tightening.
CAUTION: OVERTIGHTENING THE SCREWS CAN CAUSE BINDING OR HANG UP
OF THE BRUSHES AND INCORRECT FUNCTION OF DE-ICING SYSTEM.
FIGURE 5-15
FIGURE 5-16
61-10-20
INSTALLATION AND OPERATION INSTRUCTION
Page 5-12
2017-10-06
