Product Description
CONTACT SET (SB350 2/0)
Specifications
Product Overview
| Part Number | 00591-51300-81 |
| Product Type | Electrical Contact Set |
Physical Specifications
| Configuration | SB350 2/0 |
| Voltage Rating | 24V / 36V DC |
| Contact Material | Silver-Alloy or Copper-Nickel |
| Typical Service Life | 10,000 to 50,000 switching cycles or 2-3 years |
| Wear Indicators | Contact pitting, oxidation, discoloration, increased resistance |
Compatibility
| Application | Electric Lift Truck Control Circuits, SB350 Chargers, Operator Panels |
Frequently Asked Questions
Q: What is the 00591-51300-81 contact set used for?
A: The 00591-51300-81 is a contact set (SB350 2/0) designed for electric lift truck control circuits. It replaces worn or damaged electrical contacts in the SB350 series charger or operator control panel. Verify your equipment uses the SB350 2/0 configuration before ordering.
Q: Which electric lift truck brands does this contact set fit?
A: The SB350 2/0 contact configuration is used in electric lift trucks from Crown, Toyota, Raymond, and other major manufacturers operating 24V or 36V systems. Confirm your equipment model matches the SB350 2/0 spec before purchase. Contact us with your truck brand and model for exact compatibility verification.
Q: What causes electrical contacts to wear out and need replacement?
A: Electrical contacts wear due to normal switching cycles, thermal cycling, moisture exposure, and arcing under load. After 10000 to 50000 cycles or 2 to 3 years of service, contact surfaces oxidize or pit, causing increased resistance, intermittent operation, or complete circuit failure. Replacement is the only repair option.
Q: What symptoms indicate that the 00591-51300-81 contact set is failing?
A: Replace the contact set if the truck exhibits intermittent lift operation, slow response to control inputs, complete loss of a function (lift, lower, or directional control), or visible pitting and discoloration on the contact surfaces themselves. Electrical testing with a multimeter showing high resistance or continuity loss confirms contact failure.
Q: Is the 00591-51300-81 different from the 00591-51301-81?
A: Both the 00591-51300-81 and 00591-51301-81 are SB350 2/0 contact sets with identical specifications and fit the same control circuits. Part numbers may be cross-references or sequential stock numbers for the same component. Either part is functionally equivalent for replacement.
Q: What material are these contacts made from and does material matter?
A: SB350 2/0 contacts use silver-alloy or copper-nickel compositions selected for low electrical resistance and resistance to arcing. Using only OEM-specification or equivalent contacts ensures proper circuit performance and prevents control malfunctions. Substitute contacts of lower grade material can cause intermittent failures.