System-Matched Seal Sets — Verified against 05G compressor serial variants before dispatch, ensuring the 38mm shaft seal kit arrives with every O-ring and gasket your specific Carrier refrigeration unit requires.
Technical Specifications
| Parameter |
Value |
| Part Number |
17-44145-00 |
| Product Type |
Crankshaft Shaft Seal Kit |
| Cross-Reference |
17-44130-00, 174413000, 17-4414500, 17-44003-00, 17-44003-01, 17-57027-00 (for identification purposes) |
| Machine Fitment |
Carrier Optima, Supra 950MT, 950, X4 7500, Ultima XTC, Ultra XL XTC, XT, Ultra, X2 2100A, 2100R, 2500A, 2500R, Phoenix Ultra, Advantage, Eagle, Extra, Thunderbird, Supra 922, Supra 944 |
| Shaft Size |
38mm |
| Compressor Model |
05G |
| Material |
Nitrile rubber compound with metal reinforcement ring |
| Temperature Range |
-40°C to 120°C |
| Condition |
New Aftermarket |
| Standard |
ISO 9001 |
Application Suitability
| Engine System |
Related Components |
| Compressor Core Sealing |
Crankshaft bearings, O-ring sets, gasket kits, clutch assemblies |
| Refrigerant Containment |
Suction/discharge service valves, shaft sleeve, wear rings |
| Lubrication Circuit |
Oil pump seals, shaft key, snap rings, compressor oil |
| Drive System Interface |
Clutch coil, hub assembly, drive plate hardware |
Why Rebuilt Carrier Compressors Leak Again Within Weeks
A Crankshaft Shaft Seal Kit engine rebuild requires inspecting the mating surfaces that caused the original failure, not just swapping the rubber.
In transport refrigeration, a shaft seal rarely fails in isolation. The 05G compressor's 38mm shaft journal often shows scoring or wear that prevents the new nitrile lip from maintaining contact pressure. When a shop replaces the seal without addressing the shaft condition or swapping the companion O-rings and gaskets, refrigerant returns to the same leak path within a single cooling season [NEED_CITE: transport refrigeration compressor failure analysis protocols]. This crankshaft shaft seal kit engine rebuild approach demands a system-level view where adjacent components receive equal scrutiny.
System Integrity Beyond the Primary Seal
The Crankshaft Shaft Seal Kit engine rebuild process addresses more than the visible leak point. Carrier 05G compressors operate across extreme thermal cycles, from tropical highway hauling to frozen cargo holds, subjecting every elastomer to expansion and contraction stress. This kit belongs to a broader sealing network where failure at any single point compromises the entire refrigeration circuit.
Matched Components Prevent Staggered Failures
When the primary 38mm shaft seal receives new material but surrounding O-rings retain their compressed set, the pressure differential finds the weakest remaining path. Compressor overhaul procedures emphasize replacing all elastomers simultaneously because refrigerant molecules penetrate microscopic gaps that aged gaskets cannot block. A coordinated seal replacement ensures the metal reinforcement ring maintains uniform lip contact against the shaft journal throughout thousands of operating hours [NEED_CITE: compressor overhaul best practices for mobile refrigeration].
Reading the Material Specifications
The nitrile rubber compound specified for this seal kit covers -40°C to 120°C, spanning the full operational envelope from frozen cargo transport to engine bay heat soak. This temperature range matters because the compressor body reaches different thermal zones depending on mounting position and ambient conditions. The metal reinforcement ring prevents lip deformation under sustained pressure differentials, maintaining the interference fit that keeps refrigerant contained within the crankcase.
The Cost of Incomplete Rebuild Documentation
Missing a single O-ring from the kit inventory creates a cascade failure. Shops that receive incomplete seal sets face re-disassembly after the system pressurizes and reveals the gap. This second teardown doubles labor hours, wastes recovered refrigerant, and delays the vehicle's return to cold chain service. The hidden expense isn't the missing part—it's the diagnostic time spent chasing a leak that proper kit verification would have prevented [NEED_CITE: mobile refrigeration service downtime cost analysis].
Procurement Based on Compressor Evidence
Every kit ships with compatibility verification against your specific 05G serial number, because Carrier superseded part numbers across production years without changing the external casting marks. Our technical team confirms shaft diameter and seal profile from your compressor data plate or photograph. Sample units are available for fitment confirmation before you commit to fleet quantities, and the cross-reference chain covers every superseded number variant we've documented through field returns.
Documentation & Verification
- Commercial invoice listing all kit contents by individual part number
- Compatibility sheet mapping your compressor serial to this specific seal variant
- Dimensional inspection record confirming 38mm shaft seal tolerance
- Warranty terms covering manufacturing defects for 3-12 months
- Packing photographs showing sealed kit integrity before dispatch
- HS code classification support for customs clearance
Installation & Rebuild Sequence
- Clean the 38mm shaft journal to bare metal before seal installation
- Verify metal reinforcement ring seats flush without cocking
- Lubricate nitrile lip with compatible compressor oil during assembly
- Torque adjacent fasteners to specification to avoid housing distortion
- Pressure test the complete system before returning to service
Rebuild Information Needed
Provide your Carrier compressor model designation, serial number, and any previous rebuild history so we can confirm which seal variant matches your specific unit. Photographs of the existing nameplate or old seal components help us verify compatibility across the superseded part number chain.
Frequently Asked Questions
Q: What else should be replaced when swapping the crankshaft shaft seal?
A: The complete reseal requires all O-rings, gaskets, and shaft sleeve components that form the sealing boundary. Carrier 05G compressors have specific companion seals that age alongside the primary shaft seal, and replacing only the visible leak source leaves adjacent failure points active. We provide a complete system checklist matched to your compressor serial variant.
Q: My compressor was previously rebuilt — how do I confirm the correct seal variant?
A: Previous rebuilds may have installed oversize shafts or alternate bearing configurations that change seal requirements. Provide the compressor serial number and any rebuild documentation so we can verify whether standard or variant seals are needed. We cross-reference against known rebuild configurations documented in our compatibility database.
Q: Does the kit include all seals and O-rings needed for a complete reseal?
A: Kit contents vary by compressor serial number and production year, because Carrier modified seal configurations across the Supra and Ultima series without changing external part markings. We verify your specific variant and provide a complete contents list before shipment so you can confirm nothing is missing for your particular build.
Q: How do I verify the correct part when multiple cross-reference numbers exist?
A: Carrier superseded part numbers several times across 05G production, creating multiple valid references for the same application. We maintain a complete cross-reference table marked as reference only that maps all known variants to current configurations. Provide your existing part number or compressor serial for definitive confirmation.
Q: Can I order a sample kit to confirm fitment before committing to bulk?
A: Sample kits are available for fitment verification against your actual compressor hardware before you place fleet-level orders. This is particularly important for previously rebuilt units where shaft dimensions or housing configurations may differ from factory specifications. Contact us with your compressor details to arrange sample evaluation.
