Carrier 5H40-276 Shaft Seal

The Carrier 5H40-276 Shaft Seal is a critical replacement component engineered for high-pressure refrigeration compressor sealing applications. Specifically designed for compatibility with Carrier Carlyle 5H series compressors, including the 5H40, 5H60, and 5H80 models, this crankshaft seal kit ensures a leak-proof barrier for systems utilizing R22 and R12 refrigerants. This two-piece assembly features precision-lapped faces and a robust metal bellows construction, providing a resilient HVAC compressor shaft seal that maintains contact integrity even under fluctuating thermal loads and internal crankcase pressures. By effectively isolating the compressor oil and refrigerant from the atmosphere, the 5H40276 prevents loss of charge, maintaining system efficiency and protecting the open-drive reciprocating compressor from contaminants. Field technicians should note that this assembly replaces several legacy part numbers, including the 5H40-477 and 5H40732, ensuring broad applicability across standard and long-stroke 5H-line units.

Key Benefits:

• Optimized Leak Prevention: Precision-lapped seal faces virtually eliminate refrigerant migration along the rotating shaft.
• Broad Compatibility: Interchangeable with 5H40-276 and 5H40276, fitting a wide range of Carlyle open-drive models.
• Refrigerant Versatility: Specifically rated for the pressure demands of R22 and R12 service environments.
• Enhanced Durability: The metal construction and resilient bellows design withstand high-stress industrial HVAC operating conditions.
• Complete Assembly: Includes the carbon washer and necessary gasket components for a total shaft seal replacement.

Common Questions:

Will this seal fit other Carlyle compressor lines besides the 5H series?
This specific part is engineered for the Carrier 5H series. While construction may appear similar to the 5F series, always verify the crankshaft diameter and mounting plate specifications before installation.

What causes premature failure in these shaft seals?
Continuous operation at housing temperatures exceeding 170°F or improper lubrication during initial installation can lead to rapid hardening and cracking of the seal components. Ensure the compressor crankcase heater is functioning correctly to prevent liquid slugging.

Can I repair individual components of the 5H40-276 assembly?
To maintain the necessary precision for a vacuum-tight seal, it is standard technician practice to replace the entire shaft seal assembly rather than attempting to service individual internal parts.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.