Starting Motor Inspection: Armature: Notes

WARNING: This page is about a different car, the 2008 Suzuki Grand Vitara, 2007 Suzuki Grand Vitara, and 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

Inspect commutator for dirt or burn. Correct with sandpaper or lathe, if necessary.

Fig 1: Cleaning Commutator
Courtesy of SUZUKI OF AMERICA CORP.
Check commutator for uneven wear with armature (1) supported on V-blocks (2). If deflection of dial gauge pointer exceeds limit, repair or replace.
NOTE: Below specification presupposes that armature is free from bend. Bent armature must be replaced.

Commutator out of round

Standard: 0.05 mm (0.002 in.) or less

Limit: 0.4 mm (0.016 in.)

Fig 2: Checking Commutator For Wear With Armature
Courtesy of SUZUKI OF AMERICA CORP.
Inspect commutator for wear. If diameter is below limit, replace armature.
Commutator outside diameter

Standard: 29.4 mm (1.16 in.)

Limit: 28.8 mm (1.13 in.)

Fig 3: Measuring Commutator Outside Diameter
Courtesy of SUZUKI OF AMERICA CORP.
Inspect commutator for insulator depth. Correct or replace if below limit.
Commutator insulator depth "a"

Standard: 0.5 mm (0.020 in.)

Limit: 0.2 mm (0.008 in.)

Fig 4: Identifying Commutator Insulator Depth
Courtesy of SUZUKI OF AMERICA CORP.