Page 41 - Rapco Catalog

Misc. De-ice info

Replacements for BFG Style brush
Brush Component Identifier blocks: To convert BFG to Rapco
part number, drop prefix and add RA
plus 100 to part number

Brush Block Assy Qty Brush Location

4E1294 3 RA1306-3 All
4E1311-1 2 RA1306-1 Top & Bottom
1 RA1306-2 Middle
4E1311-2 2 RA1543-1 Top & Bottom
1 RA1543-2 Middle
4E1311-3 2 RA1543-1 Top & Bottom
1 RA1543-2 Middle
4E1350-1 3 RA1306-1 All
4E1350-2 3 RA1306-1 All
4E1350-3 3 RA1306-2 All
4E1350-4 3 RA1543-2 All
4E1350-5 3 RA1543-2 All
4E1350-6 2 RA1543-2 Top & Bottom
1 RA1543-1 Middle
4E1387-1 2 RA1306-1 Top & Bottom
1 RA1306-2 Middle
4E1387-2 2 RA1306-1 Top & Bottom
1 RA1306-2 Middle
4E1387-3, 4E1387-5 2 RA1543-1 Top & Bottom
1 RA1543-2 Middle
4E1387-4, 4E1387-6 2 RA1543-1 Top & Bottom
1 RA1543-2 Middle
4E1560-2 3 RA1306-3 All
4E1639 2 RA1543-1 Top & Bottom
1 RA1543-2 Middle
4E1749-2 2 RA1543-1 Both
4E1908-1 3 RA1543-1 All
Brush Min. Wear Dimension
Subject: How to measure brush
wear in Modular Assembly
Insert a 3/32 inch drill bit into the back of the Module Type Dimension”D”
RA2111U Universal module (as shown) and mark the
depth on the drill. Rodded Module:
Note: Make sure module is still installed, or that Brush # RA1543-6 0.295 Inch
the Brush is protruding from module at the same
distance as it would be installed on the Unrodded Module:
slip ring (Approx. 1/16 Inch). Using a dial caliper Brush # RA1543-4 1.140 Inch
measure the length of insertion (Dim. “D”).
Before installing new de-ice brushes make
sure the slip rings are clean and free of
any oil. Check to see that the slip rings are
smooth and have not separated from the pot-
ting material.

Proper brush alignment is important to
prevent the brush from grounding and to
maximize brush life.

1. Make sure that each carbon brush is adjusted so
that it is centered on its respective slip ring.

2. The brush modular assembly should be posi-
tioned so that it sits at a 2 degree angle lagging the
direction of rotation, and 1/16” away from the slip
ring at its closest point.

For Reference Only 39