excessively worn and must be replaced. Always
replace the brush springs when installing new
brushes to insure that proper tension is maintained.
Use the following procedure to replace the brushes.
1.
Disconnect the negative
(-)
battery cable at the
battery terminal.
2.
Remove theair cleanercoverand air cleanerfilter
element.
3.
Disconnect the Bt (outboard) and
B-
(inboard)
lead wires from the brush block terminals.
4.
Remove the brush block mounting screws and lift
out the brush block.
5.
Remove brushes and brush springs from holder
and replace with new parts.
6.
Pull
each brush outward from the brush holder
and at the same
time
insert (see Figure
8-11)
a
stiff wire through thesmall holes in the base of the
SPRING
BRUSH
G-1179
4-J
FIGURE
8-11.
BRUSH
REPLACEMENT
7.
8.
9.
10.
11.
12.
holder. The wire holds the brushes off the slip
rings during disassembly.
Install brush block in housing but do not tighten
mounting screws.
Remove the wire that is holding the brushes off
the slip rings by pushing
it
out through the hole in
the end of the stator housing. Adjust brush block
so
that brushes are centered on the slip rings and
then tighten mounting screws.
Connect the B+ lead wire to the outboard brush
terminal and the B- lead wire to the inboard brush
terminal.
Install brush block cover and tighten mounting
screws.
Install air filter element and air cleaner cover.
Connect negative
(-)
battery cable' to battery
terminal.
Slip
Ring Service
Remove the brush block cover and inspect the slip
rings for grooves, pits, or other damage.
If
the slip
rings are not in good condition, they may be refin-
ished using a commutator stone. Use the following
procedure to service:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the air cleaner cover and air cleaner
filter.
Disconnect the lead wires from the brush block
terminals and then insulate the lead wire ends.
Tie the lead wires
to
one side to allow clear access
to the slip rings.
Remove the brush block mounting screws and lift
out the brush block.
Remove
K1-S
lead wirefrom theS terminal on the
K1
start solenoid. Connect a pushbutton type
switch (normally open) in series between the
K1-
S
lead wire and the
S
terminal on the
K1
start
solenoid.
Place a jumper wire between remote connector
plug terminals
1
and
3.
Press the pushbutton switch to crank the engine
and then release switch as soon as the engine
starts.
Hold commutator stone (Onan
tool
#420-0259)
against rotating slip rings until carbon is removed
and all grooves or roughness is smoothed out.
Contact
wifh
rotating machin-
IliEEEl
ery can cause severe personal
injury. Keep
hands
and fingers clear while ser-
vicing slip rings.
Remove jumper wire from remote connector
Plug.
Remove insulating material from ends of brush
lead wires and then install brush block. Follow
steps
5
through
10
in Brush Replacement in this
section.
8-1
2
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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