are oil-soaked or worn to one-half of their original
Install the collector core in the mounting brack-
length. These must be replaced.
et and tighten one setscrew to secure the core to the
center post. (This setscrew will be loosened later).
Check the spring tension of each brush. Any
that are damaged or weak must be replaced. Spring
tension should be sufficient to firmly hold the
brushes against the collector ring.
Ensure the brush and arm assemblies
are installed in the proper order.
Inspect the collector ring conductors for arcing,
pitting, and corrosion. Under some conditions, the
ring will have a tendency to collect fine silt and in a
salt atmosphere, corrosion will occur. If this happens,
rotate the collector core several times. This should
Ensure that any brush and arm assemblies
clean the ring. If it does not, it might be necessary to
that have been replaced are of the proper
clean the core after disassembly.
lector core rings' surfaces and the electrical leads. If
any conductors are defective they must be replaced.
When installing the brush and arm as-
semblies, do not unhook the springs. Use
your fingers to spread the brush arms
If the collector rings are corroded, it may be
while sliding the brush and arm assem-
necessary to use a standard non-residue solvent to
blies onto the holding studs.
clean them. Then lightly sand the brushes with
double-ought (2/0) nonabrasive material. Blow out
Install the brush and arm assemblies.
any dust with compressed air.
Install any spacers that were taken off.
Any brush sets that are oil soaked cannot be
cleaned. They must be replaced.
Install the nylon outboard bearing and the nuts
If the nylon bearing is worn, replace it.
Connect the knife disconnects on the brush and
arm assemblies. Slide the plastic sleeves over the
Install the nylon bearing in the mounting bracket.