Starter/Starter 20. Remove armature (A) and lever (B). Inspect armature for signs of dragging against pole shoes. Inspect lever for cracks or excessive wear. Replace if defective. M37131 -UN-25JAN90 Inspect commutator. Look for roughness, burned bars, or any material which might cause short circuits between bars. If necessary, clean and touch up with 400 sandpaper. Never use emery cloth. Clean all dust from armature when finished. M98,2060K,50 -19-05NOV85 21. Test for grounded windings using an ohmmeter or test light. Touch probes on armature core and commutator bar. Armature windings are connected in series, so only one commutator bar needs to be checked.
M37132 -UN-25JAN90 If test shows continuity, a winding is grounded and the armature is defective. M98,2060K,51 -19-05NOV85 CTM2 (19APR90) 60-20 16, 18, 20 & 24HP Onan Engines AllTractorManuals.com 130495 22. Test for open circuited windings using an ohmmeter or test light. Touch probes on two different commutator bars. If test shows no continuity, there is an open circuit and the armature is defective. -UN-25JAN90 M37133 M98,2060K,52 -19-05NOV85 60 20