Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSMAZDA1991626 DX, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALSTARTER - GEAR REDUCTIONBENCH TESTING (DISASSEMBLED)COMMUTATOR TESTING
1991 Mazda 626 DX, Automatic
Commutator Testing
1991 Mazda 626 DX, AutomaticSECTION Commutator Testing
- Clean surface and polish with No. 400 sandpaper if required. If surface is scored, out of round or pitted, turn commutator in a lathe.
- Maximum commutator runout and minimum diameter of commutator must not exceed specification after turning. See COMMUTATOR SPECIFICATIONS table.COMMUTATOR SPECIFICATIONS
Application Maximum Runout In. (mm) Minimum Diameter In. (mm) B2200 (A/T), MX-3 V6, MX-6, Protege (A/T), RX7, 626 & 929 .004 (.10) 1.13 (28.8) B2600i (M/T) .002 (.05) 1.08 (27.4) B2600i (A/T) .002 (.05) 1.24 (31.4) MPV 4-Cylinder Engine Standard (M/T & A/T) .004 (.10) 1.08 (27.4) Heavy Duty (A/T) .004 (.10) 1.24 (31.4) V6 Engine .004 (.10) 1.13 (28.8) - Commutator mica undercut depth should be .02 -.03" (.5 -.8 mm). Minimum mica undercut depth is .008" (.20 mm). If not within specification, undercut to standard depth.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.