Repair Procedures For Individual Components; Brush Replacement; Repairing Brush Block Assembly 2I7; Attaching Individual Brushes To Brush Retainer - Piper PA-32R-301 SARATOGA SP Maintenance Manual

PROPELLER DEICING SYTEM (Cont.)
F. REPAIR PROCEDURE FOR INDIVIDUAL COMPONENTS

(1) BRUSH REPLACEMENT

Brushes are replaceable when B barrel rests entirely within block; for example, when aft end of .187
inch barrel is flush with aft surface of block. Brushes must be replaced when aft end of B barrel is .093
inch inside recess. (Refer to Detail A, Figure 30-11.) If .312 inch barrels are used, refer to Detail B,
Figure 11.
Side loads on brushes should be avoided to prevent brush damage.
(a) Remove screws which hold brush block assembly to mounting brackets and remove brush
block assembly.
(b) Remove two assembly screws which hold block together. These screws are located one on
same side as connector plug and one on side directly opposite.
(2) REPAIRING BRUSH BLOCK ASSEMBLY
(a) Discard old brush retainer assembly.
(b) Assemble new brush retainer assembly to other block by slipping block from front of retainer
assembly over brushes and then over springs. Replace two screws removed in Brush
Replacment, Step 2. This installation can be made only in this manner since springs are of
slightly larger diameter than brush slots in block and must be fed into cylindrical grooves
provided.
(c) Reassemble brush block to mounting brackets utilizing hardware previously removed.

(3) ATTACHING INDIVIDUAL BRUSHES TO BRUSH RETAINER

(a) Remove brush retainer assembly per Brush Replacement, Step 2.
(b) Compress springs by pushing brushes back into brush retainer assembly and hold them there
by wrapping with rubber bands.
(c) Mark connector plug with respect to its installation on brush retainer assembly block so that
it may be removed and replaced in exact same position.
(d) Remove four screws which hold connector plug to block.
(e) Pull connector plug from block far enough so that leads from brushes to be replaced may be
un- soldered at plug.
(f) Unsolder brush lead at connector plug and unsolder B barrel from brush rod of brush to be
replaced.
(g) Now, remove and discard old brush and spring.
(h) Place new springs over rods on new brushes and insert through holes in block of brush
retainer assembly. Compress spring and hold in position with rubber bands.
New springs and B barrels should always be used when
replacing brushes.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
– CAUTION –
– NOTE –
2I7
30-60-00
Page 30-37
Reissued: July 1, 1993