Onan MJA Series Service Manual page 115

REVOLVING ARMATUREGENERAT0R
113
),
~
,,-- ­
I
" ­
NOT USED WITH FLICKER
RESISTOR
51
,
,,. I' " ...... "
r------r
\ I
F2
4."~~
(USED WITH ..
~
FLICKER RESISTOR)...)
FIG 5.F - SCHEMATIC, REVOLVING ARMATURE GENERATOR
3. Separate the parallel field windings (at F+) and check each for
open circuit.
4. *Check for open circuit in the series winding with ohmmeter. Touch
probes to lead Sl and connection F+. If there is an open circuit
isolate each coil and check it.
5. *Test for short circuit between the starter windings and the shunt
windings. Before dOing this separate all windings at F
+.
WOODEN BLADE). ,
AW HANDLE _. • ,
HABCtAT,~Oc:0~,_ ~ ~IGHT. ~~~~8
.~.
~"MICA
_
I
WAY TO GRIND
TEETH OWARD GRIND TEETH
PO~NJJLE TE~T8~ADE
TO
GRI~TH
OF MICA
WI .
COMMUTATOR
BARS WORN BE ­
LOW LEVELOF MICA
SEPARA'TORS CAUSE
SPARKING.JUMPlNeG,
NOISY BRUSHES
FIG 5. G- UNDERCUTTING COMMUTATOR MICA
*
Doesn't apply to 5MJB Beginning SpecF
47Z
'
L-'
MICA PROPERLY
UNDERCUT