85 engine electrical.pdf - Vintage Snow

ENGINE ELECTRICALElectric Starter System Testing (Static)Starter Motor Static TestingIGNIT IONSW ITCHI GN IT JON SW ITCHSYSTEMBRN-GROUNDIGNIT ION WIRE COLORSG TERMINAL - BROWN - GROUNDB TERMINAL - RED - BATTERYM TERMINAL - BLACK - IGNIT IONS TERMINAL - RED/WHITE - STARTEROFF RUN START::~:RBR/WIGNIT I ON SW ITCHSCOLOR CODER 0 REDBRN 0 BROWNBLK 0 BLACKY 0 YELLOWR/W 0 RED WITH WHITE TRACERALTERNATOROUTPUTII~:RECT IF IERI:-=- BATTERY1 - I~ _P:!~~E _G~Q _____ __ JR '--- - - R' W--- - -.C I RCU IT BREAKER(8 AMP )//, -",," -:::::R(C)/ STARTER RELAY- ------- - (8) CHASS IS GNO 1,------- - ---(E) _ _ ____ __ _ 1 _I ENGINE GND -=I -A-E See page 4.316. Remove starter motor and disassemble. Mark end covers and housing for proper reassembly.7. Remove pinion retaining snap ring, spring and pinion gear.8. Remove brush end bushing dust cover.9. Remove housing through bolts.10. Slide brush end frame off end of starter. NOTE: The electrical input post must stay with the field coil housing.11. Slide positive brush springs to the side, pull brushes out of their guides and remove brush plate.12. Clean and inspect starter components. NOTE: Some cleaning solvents may damage the insulation in thestarter. Care should be exercised when selecting an appropriate solvent. The brushes must slide freely intheir holders. If the commutator needs cleaning, use only an electrical contact cleaner and/or a non-metallicgrit sandpaper. Replace brush assembly when worn to 5/16" (.8 cm) or less.Starter Housing and Field Coil Inspection1. Using a digital multitester, measure resistance between starter input terminal and insulated brushes. Thereading should be .3 ohms or less.2. Measure resistance between insulated brushes and field coil housing. The reading should be infinite.3. Inspect insulated brush wire and fi eld coil insulation for damage. Repair or replace components as required.Armature Testing1. Using a digital multitester, measure resistance between each of the segments of the commutator. Thereading should indicate .3 ohms or less.2. Measure resistance between commutator and armature shaft. Reading should be infinity.3. Place armature in a growler. With the growler on, position a hacksaw blade lengthwise 1/8" (.03 cm) abovearmature coil laminates. Rotate armature 360°. If hacksaw blade is drawn to the armature on any pole, thearmature is shorted and must be replaced.8/94 4.32