Repair and Testing Instructions for T1 Page 16
Alternator 0120 689 552
Edition 001
All rights rest with Robert Bosch Corp, including patent rights. All rights of use of reproduction and publication rest with R. B. Corp.
UA/ASV
04.12.98
T1ALTFinal.DOC
9.2.1 Brush Replacement
1. The exposed length of the carbon brushes must be measured to determine if they require replacement.
Measure the length of each brush. If the exposed brush length is less than 7 mm (0.276"), the brush must
be replaced. (Figure 7)
2. To replace the brushes, the brush lead must be unsoldered and the brush removed from the regulator.
3. Insert the new brush into the regulator and solder the brush lead to the regulator.
Note: Use only rosin-core solder to attached the brush lead.
4. Check the brushes for freedom of movement after they are soldered.
5. Measure the exposed length of the new brushes. The exposed length should be 16 mm (0.630")
9.3 Noise Suppression Capacitor Testing and Removal
1. Disconnect the suppression capacitor from terminal B+.
Figure 6 Voltage Regulator (1) and Suppression Capacitor (2)
Figure 7 Brush Length Measurement
