Piper Comanche PA-24 Service Manual page 771

Troubl.
Generator operating
within rated speed
range but voltage
output low. (cont)
ELECTRICAL SYSTEM
ISSUED: 8118n2
PIPER COMANCHE SERVICE MANUAL
TABLE IX-VII_ TROUBLESHOOTING
(cont)
Cau ••
R ..... ,
L.oose or hiab-resistance C lean and
ti
Ihten all
electrical connectioas. electrical connections.
Brushes -.z;cessively worn. Whea brush wears down to
112 inch. replace .,ith
a new one.
CAUTION
Do not use abrasives
of any deSCription in
seating the bnlSbes.
Brushe. binding in the The brushes should
be •
free
brush boxes. fit without eJ:cessive side
play in
the brusb
boxe •.
Binding brushes and the
brush boxes should be
wiped clean with a cloth
moistened in Varsol or
undoped ,asoline.
Excessive side play of
Repl~
the brushes as
brushes in brush boxes. outlined above.
Brusbes not properly
Reseat bNShes as outlined
seated. above.
Low brush spring tension.
Brush spring should
be.r
centrally on the top of
the brushes. insuring full
brush contact
.it~
the
face of the commutators.
Dirty commutator. Clean the commutator with
a cloth moistened in
Varsol or I.Indoped gaso-
line.
Scored or iJitted com- Tum down commutator or
mutator. replace armature.
3
E24