BRUSH STATE OF HEALTH CHECK (AGAIN) DUE TO OIL SEAL FAILURE 21-7-2021 Total miles 130185

 A few miles after refilling the SA18 gearbox I noticed oil dripping from the brush inspection cover on the bottom of the motor. - oil seal at left end of motor failed.

The problem with this is the oil contaminates the brushes and commutator causing sparking, high brush wear poor power output and other bad things.

Re-assembled with springs brushes screws etc:-

Close up of double becu spring

Brushes checked before reassembly

Check brush length 40mm left

Cleaned up commutator surface using white spirit and a rag

Rotating commutator to check all bars