Product Description
Toyota OEM spring, brush set (4 pieces) for electric lift truck motor brush holders. High-carbon steel, oil tempered wire; engineered for use in Toyota 6BPU series electric motors. Direct OEM replacement for TO 00590-04574-71, maintains critical brush contact in motor assemblies. No known cross-reference or supersession part numbers.
Specifications
Material & Construction
| Spring Material | High carbon steel per ASTM A228 |
Part Numbers
| OEM Part Number | 00590-04574-71 |
| Manufacturer Part Number | 00590-04574-71 |
| Compatible Equipment Models | Toyota 6BPU15 electric lift truck |
Frequently Asked Questions
Q: What material is the TO 00590-04574-71 spring made from?
A: The TO 00590-04574-71 is manufactured from high-carbon steel wire per ASTM A228 specification, oil-tempered for fatigue resistance and durability. This material ensures the spring maintains consistent contact force between brushes and the commutator throughout its service life.
Q: What is the purpose of this brush holder spring?
A: This spring maintains constant pressure on the brush block against the commutator surface, ensuring stable electrical contact as the brushes wear down. Proper spring tension is critical for low contact resistance and consistent motor electrical performance. The set includes four springs (one per brush).
Q: Which Toyota electric lift truck motors use the TO 00590-04574-71 spring?
A: The TO 00590-04574-71 is engineered for the Toyota 6BPU15 electric lift truck drive motor. This spring is a direct OEM replacement and is not cross-referenced or superseded by other part numbers. Verify your motor model matches 6BPU15 before ordering.
Q: What happens if a brush holder spring breaks or weakens?
A: A broken or weakened spring causes loss of brush contact pressure, leading to high contact resistance, increased electrical heat, reduced motor efficiency, and poor brush wear characteristics. Symptoms include erratic motor operation, increased current draw, and accelerated commutator damage. Replace the failed spring immediately.
Q: How do you inspect the condition of brush holder springs?
A: Visual inspection during brush replacement should reveal any cracks, permanent deformation, or rust on the spring. A spring that does not hold the brush firmly against the commutator or feels loose indicates loss of temper or breakage. Springs degrade over time and should be replaced whenever brushes are replaced.