Delco 27SI Testing and Adjusting – Brush Length – Check

Brush holder

(1) Brushes

(2) Brush length

1. Measure the length of brushes (1). The minimum brush length (2) is 7.6 mm (0.30 inch). New brush length (2) is 21.9 mm (0.86 inch).

2. Replace the brush holder if the brush length (2) is near the minimum length.