Section 12 (Starting System & Charging System (H6DO)): Generator: Inspection: Brush

2014 Subaru Legacy 2.5i, Automatic CVT TransSECTION Brush
WARNING: This page is about a different variant/trim than selected.
  1. Measure the length of each brush. Replace the brush if wear exceeds service limits. There is a service limit mark (A) on each brush.

    Brush length: 

    Standard (1) 22.5 mm (0.886 in) 

    Limit (2) 5.0 mm (0.197 in) 

    Fig 1: Identifying Brush Length
    G06648715Courtesy of SUBARU OF AMERICA, INC.
  2. Using a spring pressure indicator, push the brush into the brush holder until its tip protrudes 2 mm (0.08 in). Then measure the pressure of brush spring. If the pressure is 2.648 N (270 g, 9.52 oz) or less, replace the brush spring with a new part. 4.609 - 5.786 N (470 - 590 g, 16.58 - 20.810 oz) pressure is required on the new spring.
    Fig 2: Measuring Pressure Of Brush Spring
    G07910127Courtesy of SUBARU OF AMERICA, INC.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.