WASHER 0131016 - Caterpillar

Electrical System
Most of the electrical system testing can be performed on the engine. The wiring insulation must be in satisfactory condition, the wire and cable connections both clean and tight and the battery fully charged. An "on-engine" test that indicates a defective component usually requires component removal for further testing.Battery
5P300 Electrical Tester.9S1990 or 1P7470 Battery Charger Tester.5P957 or 5P3414 Coolant and Battery Tester. Make reference to Special Instruction (GEG02276) and to the instructions inside the cover of the tester, when testing with the 5P300 Electrical Tester.9S1990 Battery Charger Tester.The storage battery circuit represents a continuous, although variable, electrical load to the charging unit. If the circuit, positive or negative is opened or broken while the charging unit is charging, the loss of the battery load will result in the charging voltage rising to unsafe levels.High voltage will damage the charging unit and regulator and may damage other electrical components or instruments.NEVER DISCONNECT ANY CHARGING UNIT CIRCUIT OR BATTERY CIRCUIT CABLE FROM BATTERY WHEN THE CHARGING UNIT IS PRODUCING A CHARGE.A load test should be made on a battery that discharges very rapidly when in use. To do this apply a resistance of (for 6 volt, two times and for 12 volt, three times) the ampere/hour rating of the battery across the battery main terminals. Allow the resistance to discharge the battery for 15 seconds and immediately test the battery voltage. A 6 volt battery in good condition will test 4.5 volts; a 12 volt battery in good condition will test 9 volts.The instructions included with the 9S1990 Battery Charger Tester covers completely the battery testing subject.Charging System
5P300 Electrical Tester. Make reference to Special Instruction (GEG02276) and to the instructions inside the cover of the tester, when testing with the 5P300 Electrical Tester.The condition and state of charge of the battery at each regular inspection will indicate if the charging system is operating efficiently. An adjustment is necessary when the battery is always in a low state of charge or an excessive amount of water must be added to the battery (more than one ounce of water per cell per week or per every 50 service hours).Charging units and voltage regulators should be tested on the engine when possible, using wiring and accessories that are a permanent part of the system. Bench testing will provide the technician with an operational test of the charging unit or voltage regulator. Pre-repair testing will advise the depth of needed repairs. Final testing will prove the units are restored to their original operating efficiency.Before starting the on-engine test the charging system and battery must be checked as stated in the following steps to eliminate possible difficulty.1. Battery must be at least 75% (1.240 Sp. Gr.) full charged and properly secured in the carrier. The carrier must not place excessive physical strain on the battery.2. Cables between the battery, starter and engine ground must be of recommended wire size. Wires and cables must be free of corrosion with cable supporting clamps to reduce strain