Product Description
High-performance thermostat and gasket assembly designed for Hyster and Yale electric lift trucks equipped with GM 4.3L engines. Maintains precise 180°F (82°C) coolant temperature setpoint with stainless steel thermostat element and durable high-temperature fiber gasket. Engineered for reliable engine thermal management and emission compliance in demanding lift truck duty cycles.
Specifications
Material
| Material Specification | Gasket: cellulose fiber; Thermostat frame: 300 series stainless steel |
| Operating Environment | Engine coolant, glycol-water blend |
Performance
| Setpoint Temperature | 180°F (82°C) |
| Maximum Coolant Pressure (continuous) | 20 PSI |
| Construction Material | Stainless steel element and high-temperature fiber gasket |
Part Information
| Part Number | 1450643 |
| Application Type | Electric lift truck applications utilizing GM 4.3L engines |
| Compatible Equipment | H70XMK005, H80XMK005, H90XMK005, H100XMK005, H110XMK005, H120XMK005, S100XMBCSE004-GM, S100XME004-GM, S110XME004-GM, S120XME004-GM, S120XMSE004-GM, S70XME004-GM, S80XMBCSE004-GM, S80XME004-GM, S90XMBCSE004-GM, S90XME004-GM, S80XMF004-GM, S90XMBCSF004-GM, S90XMF004-GM, S70XMF004-GM, S80XMBCSF004-GM, S100XMBCSF004-GM, S100XMPRSF004-GM, S120XMSF004-GM |
Frequently Asked Questions
Q: What Hyster models use the 1450643 thermostat and gasket assembly?
A: The 1450643 is designed for Hyster electric lift trucks (models H70XMK005, H80XMK005, H90XMK005, H100XMK005, H110XMK005, H120XMK005) equipped with GM 4.3L engines. It is also compatible with Yale S-series models S70XME004-GM, S100XMBCSE004-GM, S100XME004-GM, S110XME004-GM, S120XME004-GM and related variants.
Q: What is the operating temperature setpoint of the 1450643?
A: The 1450643 thermostat maintains a coolant temperature of 180 degrees Fahrenheit (82 degrees Celsius). This setpoint is optimized for GM 4.3L engine performance and emission compliance in lift truck duty cycles.
Q: What materials make up the 1450643 thermostat and gasket assembly?
A: The 1450643 features a stainless steel thermostat element for corrosion resistance and precision temperature control. The gasket is constructed from high-temperature fiber material rated for sustained engine compartment conditions. Both components are engineered for original equipment fit and durability.
Q: When should the 1450643 be replaced?
A: Replace the 1450643 if coolant temperature runs continuously below 160 degrees Fahrenheit (indicating sluggish warm-up), if temperature exceeds 200 degrees Fahrenheit (indicating restricted flow), or if visible coolant leaks appear at the gasket seal. OEM replacement interval is typically 1,500 operating hours or every two years.
Q: Are there alternative part numbers for the 1450643 thermostat?
A: The 1450643 is the OEM manufacturer part number for this application. Cross-compatibility with aftermarket thermostats depends on matching the 180-degree Fahrenheit setpoint, stainless steel construction, and GM 4.3L engine block connection specifications. Verify exact dimensions and mounting orientation before substituting alternative parts.