Bosch Alternator Repair Manual
Bosch Alternator, Overhaul Remove and disassemble alternator, see corresponding operation. Cleaning petrol can be used as a cleaning agent. Electrical windings should only brought into contact with the cleaning agent briefly. Cleaned parts should be immediately blown dry with compressed air. Wash out ball bearing.
Volkswagen DESCRIPTION Bosch alternators are conventional 3-phase, self-rectifying. Repair or replace alternator. OVERHAUL DISASSEMBLY 1) Remove nut, lock washer, and pulley. Note position of. Bosch alternator part numbers are preceded by the. ALTERNATOR & REGULATOR - BOSCH Article Text (p. Factory Approved Alternator Service Manual, 1978, for Bosch, Chrysler, Ford, etc See more like this. Volvo 850 S70 V70 C70 service & repair manual. ALTERNATOR & REGULATOR. 1995 Volvo 850. 1995-96 STARTING & CHARGING SYSTEMS Volvo Alternators & Regulators 850 NOTE: Some Volvos are equipped with a Nippondenso generator. Testing information on these generators is not available from the manufacturer.
Replace defective ball bearings. Clean housing parts. Clean stator and claw pole rotor.
Bosch Alternator Rebuild Parts
Check all phases of stator winding for short circuit to ground using ohmmeter. Ohmmeter should indicate infinity. Replace stator with short circuit to ground. Check all phases of stator winding for short-circuited windings using ohmmeter (ohmic resistance).
Resistance between two phases is measured. Hold probes alternately on ends of windings. See Technical Data for test values Replace stator with short-circuited winding. Check rotor winding and slip rings for short circuit to ground using ohmmeter. Ohmmeter should indicate infinity. Replace rotor with short circuit to ground. Check rotor winding for short-circuited winding using ohmmeter (ohmic resistance).
How To Rebuild Bosch Alternator
Resistance of excitation winding from slip ring to slip ring is measured. See Technical Data for test values Replace rotor with short circuit. Clean and polish slip rings with fine emery paper (grain 500-600) - on lathe. Turn down uneven slip rings; dimensions, see Technical Data. When doing this, only remove as much material as is necessary to even out the worn sections. Afterwards, slip rings should again be polished and blown dry. Diodes, Check Circuit diagram of an electronically-regulated alternator 1 Rectifier diodes 2 Excitation diodes 3 Stator winding 4 Excitation winding 5 Electronic voltage regulator (connected) 6 Battery 7 Ignition lock 8 Charge telltale With the diode test described in the following, individual diodes can be tested for continuity, interruption, short circuit and blocking action.
The test result allows only qualitative statments to be made about the effectiveness of the diode or the condition of the barrier layer. If an exact check of the diodes is required, use diode-checking equipment - observe manufacturer's instructions. If any diode is faulty, replace diode plate completely. When checking diodes using test lamps, only use equipment up to 24 volts DC. Negative Diodes (1), Check Individually Hold positive probe (2) to diode housing and other probe (3) to diode connection. Test lamp must light up. Excharge probes and check again.
Test lamp must not light up. Negative diodes show continuity from housing to connection and block in the reverse direction. If any diode is faulty, replace diode plate completely. Positive Diodes (1), Check Individually Hold positive probe (2) to diode connection and other probe (3) to diode housing. Test lamp must light up. Exchange probes and check again.
Test lamp must not light up. Positive diodes show continuity from connection to housing and block in the reverse direction. If any diode is faulty, replace diode plate completely. Excitation Diodes (1), Check Individually Excitation diodes are checked in the same way as positive diodes. The positive probe (2) must be held to the diode connection and the other probe to the contact rail (3).
If any diode is faulty, replace diode plate completely. Carbon Brushes, Check Replace carbon brushes if worn down to minimum dimension - see Technical Data. When soldering in new carbon brushes, maintain projection - see Technical Data. Important: Solder must not run up strand. Check new brushes for ease of run in the brush holders. Related Literature Units - Bosch Alternator, Overhaul.