Gravely 424 - Page 20

SEBVICE:
llrese startors
are
pre-lubricated
during assembly
and further
lubrication
is not normally
needed
until
t}e
falter
is
partially
disassembled for brush
or
commutetor
servicing.
These
servicrs
are
not required
at
any
speciffc hourly basis
-
they should
be
performed
only after
starter
performance
indicates
&e
need
of such
seryicr. Instructions for brush,
commutator and lubrication
servie
follow.
The end
cap assembly
must
be removed
to inspect and
service
the brushes
and
commutator.
Remove
the
two tlru bolts then
carefully slip end
cap off
end of armature.
Lift
spring and
remove
positive
brush from
holder
if
complete removal of
end cap is necessary.
Brush-Commutator Service:
Use a
@arse cloth
to
clean brushes
and
commutator.
If
commutator is
grooved
or
exhemely
dirty,
use a commutator
stone
or ffne
sandpaper
to
polish
-
do not
use emery
cloth.
Brushes
should
be replaced if
unevenly worn
or
worn to less than
5110" in length.
Brush
replacement
is'made
with
a
new
Brush Kit. The
rivet must be drilled
out and the
new brush
riveted
in its
place.
Make
sure
good
mechanical
and electrical
contacts are
made. Positive
brush
is afrxed
to
ffeld winding.
Peel back
insulating
material,
re-
move old brush. Solder
or
clip
new
brush
to same
spot, rewrap
insulating
material
around new
joint.
End
Cep Installation:
Before reassembling
new
or serviced
end
cap
assbmbly,
lightly
coat bushing
and
end
of
the
armature shaft with
SAE
No. 10
oil
-
make
sure there is
no
excess
of oil
to splatter from
these
parts.
Insert
positive
brush in a holder.
Hold
positive
brush
spring
away with
a needle
nose
pliers,
then
carefully
guide
end
cap into
position
-
release
brush spring
after
brushes are
started
on
commutator.
Secure
end
cap to frame
with
two thru bolts. Tighten
bolts to 40-55 inch
lb. torque.
flendix Drive Asssnbly:
To inspect and
service
the
Bendix
drive,
remove
starter from
engine (remove
two
mounHng tlolts).
If drive pinion
or splined
sleeve is
damaged,
replace
Bendix
drive assembly.
If
Bendix is
in
good
condition, wipe
clean
-
do not lubricate
-
leave
completely
dry.
MOUNTING'ALIGNMENT:
Make
sure the
special
mounting
bolts
(and
lock washers)
are used
when
rein-
stalling starter.
In
addition to securing
the starter
to
the
machined
surface
on
the crankcase,
these
special
bolts
provide
proper
alignment
of the
Bendix drive
gear
to the ring
gear
on the
engine.
Use of
ordinary bolts
will aI-
Iow
the
starter to shift which
could
result in clashing
and damage
to the
gears.
Trouble
Analysis:
&oblems
that can
occur
during
normal usage
are listed
in
the accompanying
chart.
The
symptom,
possible
cause
and the suggested
remedy are
stated.
If these
steps
do
not
solve
the
problem,
the
start-
ing
motor
should be
replaeed.
Replacement
of the end eap
assembly,
which includes
the
negative
brqsh
and
spring,
is
the only recommended
ffeld
service
that
requires
partial
disassembly
of the
motor
-
complete
disas-
sembly
rnust not
be
attempted
in the
ffeld.
Figure 13
-
Bendix Drive
-
Ring
Geor Engogemcnt
t9