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.
2004 Lexus IS 300 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Generators & Regulators: Overhaul: Generator: Disassembly
- Remove nut and terminal insulator. Remove plate terminal and rear end cover. See Fig 1. Remove brush holder and voltage regulator. Remove diode (rectifier) holder. Remove rubber insulators. Use generator Pulley Set Nut Wrench Set (SST 09820-63011) to remove generator pulley.
- To remove pulley, install SST "A" and "B" to rotor shaft and tighten SST "B" clockwise to 29 ft. lbs. (39 N.m). See Fig 2. Place SST "C" securely into a vise. Verify that SST "A" is secured to rotor shaft and install SST "A" and "B" and generator into SST "C". Turn SST "A" in correct direction to loosen pulley nut. To prevent damage to rotor shaft, DO NOT loosen pulley nut more than 1/2 turn. Remove generator from SST "C". Turn SST "A" and "B", remove pulley nut and pulley.
- Remove rectifier end frame using Puller (SST 09950-40011). Remove generator washer. Remove rotor from drive end frame (stator).
Factory Service Tools
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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.
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