Matched Seal Sets — This 05G Crankshaft Seal Kit 17-44145-00 ships with all rotating-assembly sealing components verified against the compressor serial variant to prevent refrigerant leakage during rebuild.
Technical Specifications
| Parameter |
Value |
| Part Number |
17-44145-00 |
| Product Type |
Crankshaft Seal Kit |
| Compatible Compressor |
05G |
| Shaft Size |
38 mm |
| Condition |
New Aftermarket |
| Warranty |
3-12 months against manufacturing defects |
| Cross-Reference |
17-44130-00, 17-44145-00, 17-44003-00, 17-44003-01, 17-57027-00 (reference only) |
| 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 |
| Standards |
ISO |
Application Suitability
| Engine System |
Related Components |
| Compressor Crankshaft Sealing |
Shaft seal, O-rings, gaskets, and retaining hardware required for the 05G rotating assembly |
| Refrigerant Containment System |
Adjacent housing gaskets and bearing seals that interface with the crankshaft seal during operation |
| Compressor Overhaul Kit |
Full seal and gasket sets needed when the 05G unit is opened for bearing or piston service |
| Fleet-Level Rebuild Stocking |
Seal kits for Carrier Supra, Ultima, and Ultra transport refrigeration units maintained in rotation |
When a Compressor Seal Fails, the System Is Already Compromised
A leaking crankshaft seal on an 05G compressor rarely fails in isolation — it signals wear across the entire rotating assembly that must be addressed together.
In the Yangtze River Delta cold-chain logistics corridor, I have watched repair centres replace a crankshaft seal only to have the unit leak again within a season because adjacent O-rings and housing gaskets were already degraded. The 05G Crankshaft Seal Kit engine rebuild process demands that every sealing surface in the shaft interface zone be renewed simultaneously. Skipping any one component in this system means the next failure is already scheduled [NEED_CITE: compressor shaft seal failure root cause analysis in transport refrigeration].
This is not a part you swap and forget. The 38 mm shaft interface on the 05G compressor operates under continuous thermal cycling and refrigerant pressure, conditions that age every elastomer in the seal chamber at roughly the same rate. A 05G Crankshaft Seal Kit engine rebuild that addresses only the visibly failed component leaves the remaining original seals as the weakest link in a system that cannot afford a second teardown.
The Sealing System Behind the Crankshaft Interface
The crankshaft seal sits at the point where the rotating shaft exits the compressor housing, making it the primary barrier against refrigerant escape. On the 05G platform used across Carrier Supra and Ultima series units, this seal operates in conjunction with housing O-rings and bearing-side gaskets that share the same thermal and pressure environment. Replacing the crankshaft seal without renewing these adjacent components leaves aged elastomers in the sealing chain. A complete 05G Crankshaft Seal Kit engine rebuild approach ensures every sealing element in the shaft zone is matched in age and material specification.
Serial Variants and the Dimensions That Change Between Builds
Carrier produced the 05G compressor across multiple serial ranges, and internal dimensions at the shaft interface are not identical in every build. Previous overhauls may have introduced non-standard tolerances or alternate-grade components that affect how the current seal kit seats. Before committing to a bulk order, the compressor serial number must be cross-checked against the kit compatibility table. I have seen workshops order standard seal kits for units that had already been machined or sleeved during a prior rebuild, resulting in a shaft seal that physically fits but cannot hold pressure [NEED_CITE: compressor serial variant dimensional differences in transport refrigeration units]. Verifying the serial range and any documented rebuild history prevents this category of mismatch.
What the 38 mm Shaft Specification Means for Seal Performance
The 38 mm shaft diameter defines the inner sealing lip geometry and the spring tension required to maintain contact under operating conditions. On the 05G compressor, this shaft size correlates with specific refrigerant pressure ranges and rotational speeds typical of transport refrigeration duty cycles. The seal material must tolerate the refrigerant type and lubricant chemistry circulating through the system, and any deviation in lip compound or spring rate leads to either excessive friction or inadequate sealing force. Kit contents include the shaft seal, mating O-rings, and installation hardware dimensioned for this specific shaft specification. Correct material selection at this interface is critical for maintaining system pressure integrity over the service interval [NEED_CITE: elastomer compatibility standards for refrigerant compressor shaft seals].
The Cost of a Mismatched Seal Kit
Ordering a crankshaft seal kit that does not account for the specific compressor build variant leads to one of two outcomes: the kit does not fit at all, requiring a return and a second machine-down period, or it fits loosely enough to install but fails under pressure within weeks. Both scenarios compound the original repair cost with additional labour, refrigerant recovery, and vehicle downtime. For fleet operators running Carrier Supra or Ultra units in temperature-controlled transport, a single mis-sealed compressor can compromise an entire load. The hidden expense is never the part itself — it is the second teardown, the spoiled cargo, and the lost confidence in the repair [NEED_CITE: cold chain cargo loss from transport refrigeration compressor failure].
Why Source This Kit Through a System-Level Supplier
Our Guangzhou facility consolidates engine-system components under a single warranty and a single dispatch, meaning this crankshaft seal kit ships alongside any adjacent gaskets, bearing seals, or overhaul kit items the same 05G rebuild requires. Part identification is confirmed from the compressor serial number, a photograph of the nameplate, or the existing part number, with cross-reference verification covering superseded numbers like 17-44130-00 and 17-57027-00. We supply from one piece upward, so a workshop facing a single machine-down event is not blocked by minimum order quantities. Sample kits are available for fitment confirmation before a fleet-level commitment, and our technical team verifies shaft dimensions and seal material against the specific compressor build to prevent grade or size mismatches.
Documentation & Verification
- Commercial invoice and packing list itemizing every seal kit component by line
- Compressor compatibility and cross-reference sheet marked reference only for OEM numbers
- Dimensional inspection record confirming 38 mm shaft seal tolerances
- Warranty terms covering manufacturing defects for 3 to 12 months
- Packing photographs documenting kit contents before crate closure
- HS code classification support for customs clearance of refrigeration compressor parts
Installation & Rebuild Sequence
- Clean the crankshaft bore and housing seat to remove all previous seal residue before kit installation
- Verify shaft diameter measures within tolerance for the 38 mm specification using a calibrated micrometer
- Lubricate the seal lip with system-compatible oil to prevent dry-start scoring on initial compressor run
- Install retaining hardware to specified torque values to avoid housing distortion that breaks the seal plane
- Run the compressor through a pressure-hold test to confirm zero leakage at the shaft interface before recharging
Request a Compatibility Confirmation
Provide the Carrier compressor model, serial number, and any documented rebuild history so we can verify which variant of the 05G Crankshaft Seal Kit engine rebuild package matches your unit. If the nameplate is worn or painted over, a photograph of the compressor housing and shaft area is sufficient for our technical team to identify the correct kit configuration. For fleet-level stocking inquiries, share the range of Supra, Ultima, or Ultra unit serial numbers in your operation to receive a consolidated seal kit recommendation.
Frequently Asked Questions
Q: What components are included in this crankshaft seal kit?
A: The kit contains the primary crankshaft shaft seal dimensioned for the 38 mm interface, all mating O-rings and housing gaskets required at the seal chamber, and the retaining hardware needed for installation. Every component is matched to the 05G compressor platform to ensure the entire rotating-assembly sealing zone is renewed in a single service event.
Q: Does this kit fit all 05G compressor variants?
A: The 05G compressor was produced across multiple serial ranges, and internal dimensions at the shaft interface can vary between builds. We cross-check the compressor serial number against our compatibility table before dispatch to confirm the kit matches your specific unit, including any units that may have been modified during a previous overhaul.
Q: What adjacent seals should be replaced at the same time?
A: Housing O-rings, bearing-side gaskets, and any shaft-adjacent elastomers that share the same thermal and pressure environment should be renewed together with the crankshaft seal. These components age at similar rates, and leaving any original seal in place creates a weak point that will likely fail before the next scheduled service interval.
Q: How do I confirm the correct kit if my compressor was previously rebuilt?
A: Previous overhauls may have introduced non-standard tolerances or alternate-grade components. Provide the compressor serial number and any available rebuild documentation so our technical team can verify whether the standard kit applies or whether a variant configuration is needed to match the current internal dimensions.
Q: Can I order a sample before committing to a fleet quantity?
A: Yes, we supply single-piece sample kits for fitment verification before you commit to a bulk order. This allows your workshop to confirm physical compatibility with your specific 05G compressor variant and validate the installation sequence before scheduling fleet-wide seal replacements.
