85 engine electrical.pdf - Vintage Snow

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ENGINE ELECTRICALBattery ServiceLoad TestNOTE: This test can only be performed on machines equipped with electric start. This test cannot be performedif the engine or starting system is not working properly.A battery may indicate a fully charge condition on the OCV test and the specific gravity test, but still not have thestorage capacity necessary to properly function in the electrical system. For this reason, a battery capacity orload test should be conducted whenever poor battery performance is encountered.To perform the test, hook a multitester to the battery in the same manner as in the OCV test. The reading shouldbe 12.6 volts or greater. Engage the electric starter and view the registered battery voltage while cranking theengine. Continue the test for 15 seconds. During this cranking period, the observed voltage should not drop below9.5 volts. If the beginning voltage is 12.6 or higher and the cranking voltage drops below 9.5 volts during the test,replace the battery.Refilling a Low BatteryThe normal charge/discharge cycle of a battery causes .the cells to give off gases. These gases, hydrogen andoxygen, are the components of water. Because of the loss of these gases and the lowering of the electrolyte level,it will be necessary to add pure, clean distilled water to bring the fluid to the proper level. After filling, charge thebattery to raise the specific gravity to the fully charged position (1 .270 or greater).)Off Season StorageTo prevent battery damage during extended periods of non-use, the following basic maintenance items must beperformed.1. Remove battery from machine and wash the case and battery tray with a mild solution of baking soda andwater. Rinse with lots of fresh water after cleaning. CAUTION: Do not allow any of the baking soda solution toenter the battery or the acid will be neutralized.2. Using a wire brush or knife, remove any corrosion from the cables and terminals.3. Make sure the electrolyte is at the proper level. Add distilled water if necessary.4. Charge at a rate no greater than 1/10 of the battery's amp/hr capacity until the electrolyte's specific gravityreaches 1 .270 or greater.5. The battery may be stored either in the machine Specific Gravity of Electrolyte Freezing Pointwith the cables disconnected, or on a piece of1.265 -75 0 Fwood in a cool place. NOTE: Stored batteries1.225 -35lose their charge at the rate of 1 % per day. TheyFshould be fully recharged every 30 to 60 daysduring a non-use period. If stored during wintermonths, the electrolyte will freeze at highertemperatures as the battery discharges. Thechart indicates freezing points by specific gravity.1.2001.1501.1001.050-1JO F+5 0 F+18 0 F+270 FCharging ProcedureCharge battery with a charger no larger than 1/10 ofthe battery's amp/hr rating for as many hours asneeded to raise the specific gravity to 1.270 or greater.WARNING: The gases given off by a battery areexplosive. Any spark or open flame near a battery cancause an explosion which will spray battery acid onanyone close to it. If battery acid gets on anyone,wash the affected area with large quantities of coolwater and seek immediate medical attention.Battery electrolyte is poisonous. It contains acid!Serious burns can result from contact with the skin,eyes, or clothing.ANTIDOTE:EXTERNAL: Flush with water.INTERNAL: Drink large quantities of water or milk.Follow with milk of magnesia, beaten egg, or vegetableoil. Call physician immediately.EYES: Flush with water for 15 minutes and get promptmedical attention.Batteries produce explosive gases. Keep sparks,flame, cigarettes, etc. away. Ventilate when chargingor using in closed space. Always shield eyes whenworking near batteries.KEEP OUT OF REACH OF CHILDREN.o8/94 4.30
ENGINE ELECTRICALDynamic Testing of Electric Starter SystemCondition: Starter fails to turn motor or motor turns slowly.NOTE: Assure that engine crankshaft is free to turn before proceeding. For this test a digital multitester mustbe used.With tester on VDC, place tester black lead on batterynegative (-) terminal and tester red lead on batterypositive (+) terminal. Reading should be 12.6Vor greater. Is it?No-+Yes~(A) Page 4.32Disconnect red engagement coil wire from start solenoid.Connect black tester wire to an appropriateground and red lead to red harness wire at solenoid.Rotate ignition key to the start position. Metershould read battery voltage. Does it?No-+Yes~Reconnect solenoid, connect tester black lead tobattery positive terminal and red tester lead to solenoidend of battery to solenoid cable. Turn key tostart position. The reading must be less than .1 VDC. Is it?No-+Yes ~(8) Page 4.32Connect black tester lead to solenoid end of batteryto solenoid cable and red tester lead to solenoid endof solenoid to starter cable. Turn key to start position.The reading must be less than .1 V DC. Is it?No-+Yes ~(C) Page 4.32Connect black tester lead to solenoid end of solenoidto starter cable and red tester lead to starter end ofsame cable. Turn key to start position. The readingmust be less than .1 V DC. Is it?No-+Yes ~(D) Page 4.32Connect black tester lead to starter frame. Connectred tester lead to battery negative (-) terminal. Turnkey to start position. The reading should be lessthan .1 V DC. Is it?No-+Yes~(E) Page 4.32If all these tests indicate a good condition, yet thestarter still fails to turn, or turns slowly, the startermust be remove for static testing and inspection.Remove battery, test and/or service. Install a fullycharged shop battery to continue the test.(Continue with left column)With black tester lead on ground, check for voltageat large relay in terminal" circuit breaker in and outterminals, and across both sides (red and red/white)of the ignition switch with switch on start. Repair orreplace any defective parts.Clean battery to solenoid cable ends or replacecable.Replace starter solenoid.Clean solenoid to starter cable ends or replacecable.Clean ends of engine to battery negative cable orreplace cable.c4.31 8/94
Page 1 and 2: CHAPTER 4ENGINE ELECTRICAL "Ignitio
Page 3 and 4: Electronic Control SystemSystem III
Page 5 and 6: 1985 ModelsENGINE ELECTRICALIgnitio
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