TO 00591-39666-81

Frequently Asked Questions

Q: What is the Toyota Contact Kit TO 00591-39666-81?
A: The TO 00591-39666-81 is an OEM electrical contact assembly designed for direct replacement in Toyota electric lift truck contactors. The kit includes silver alloy contacts mounted on a copper backing plate, engineered to meet Toyota OEM maintenance standards for reliable electrical switching under high-current load conditions.

Q: Which Toyota lift truck contactor models accept the TO 00591-39666-81 contact kit?
A: The TO 00591-39666-81 is manufactured as an OEM Toyota contactor repair component. Fitment depends on contactor size, terminal layout, and voltage rating. Verify compatibility by matching the contactor model number, coil voltage, and amperage rating with your equipment before ordering. Contact our parts team with your truck model and serial number for confirmation.

Q: What materials are used in the TO 00591-39666-81 contact kit?
A: The TO 00591-39666-81 features silver alloy contacts bonded to a copper backing plate. Silver alloy provides superior arc resistance and electrical conductivity compared to standard copper contacts. The copper backing plate ensures solid mechanical support and efficient heat dissipation during switching cycles.

Q: How long do the silver alloy contacts in TO 00591-39666-81 last?
A: Under normal intermittent duty in lift truck applications, silver alloy contacts typically provide 500,000 to 1,000,000 electrical cycles before replacement is necessary. Lifespan depends on load current, switching frequency, and arc erosion rate. Contacts showing visible pitting, blackening, or causing sluggish contactor operation require replacement.

Q: What symptoms indicate that the TO 00591-39666-81 contacts need replacement?
A: Worn contacts cause intermittent electrical connection, resulting in slow or hesitant lift acceleration, reduced hoist speed, chattering sounds from the contactor, or complete loss of motor power until the contactor is cycled again. Visible contact pitting or severe discoloration also indicates replacement is needed.

Q: Are cross-reference part numbers available for the TO 00591-39666-81 contact kit?
A: The TO 00591-39666-81 is a Toyota OEM part. No superseding or cross-reference part numbers are available. For compatibility with other brands or contactor types, consult your equipment documentation or provide your contactor model specifications to our parts team for guidance.