Matched Rebuild Sets — Seal grade and crankshaft surface condition verified against 05G compressor serial before dispatch
Technical Specifications
| Parameter |
Value |
| Part Number |
17-44145-00 |
| Product Type |
Shaft Seal |
| Cross-Reference (reference only) |
17-44145-00, 17-44130-00, 17-44003-00, 17-44003-01, 17-57027-00 |
| Machine Fitment |
Carrier Optima, Supra 950MT, Supra 950, Supra 922, Supra 944, X4 7500, Ultima XTC, Ultra XL XTC, Ultra XT, Ultra, Phoenix Ultra, X2 2100A, X2 2100R, X2 2500A, X2 2500R, Advantage, Eagle, Extra, Thunderbird |
| Compressor Model |
05G |
| Shaft Diameter |
38 mm |
| Inner Diameter |
38 mm |
| Material |
FKM (fluorocarbon elastomer) |
| Spring Material |
Hardened stainless steel |
| Temperature Range |
-20°C to +200°C (continuous service) |
| Surface Finish (mating interface) |
Ra ≤ 0.4 μm |
| Condition |
New Aftermarket |
| Warranty |
6 months against manufacturing defects |
| MOQ |
1 piece |
| Standards |
ISO 9001, ISO 6194-1 |
Application Suitability
| Engine System |
Related Components |
| Compressor crankshaft sealing |
Shaft seal, gaskets, O-rings, bearing shells |
| Refrigerant circuit containment |
Service valves, sight glasses, filter driers |
| Lubrication management |
Oil separator elements, crankcase heaters |
| Overhaul planning |
Complete seal kits, piston ring sets, valve plates |
Why Rebuilds Fail Before the Next Service Interval
A single leak often signals broader wear across the 05G compressor assembly. Replacing the 05G crankshaft shaft seal engine rebuild replacement component without checking adjacent bearings and mating surfaces invites early failure. [NEED_CITE: HVAC compressor teardown inspection protocols]
I have opened compressors in Lagos and Mombasa where the shaft journal was scored beyond the Ra ≤ 0.4 μm specification, yet a standard seal was forced in anyway. The unit ran for a week before refrigerant and oil bled out again. Matched tolerances and a full system review prevent that costly repeat teardown.
The Seal's Role in the Compressor Assembly
This shaft seal sits at the critical exit point of the 05G crankshaft, containing both lubricating oil and high-pressure refrigerant during continuous rotation. It is not an isolated wear item; its condition directly reflects the health of the shaft bearings and the alignment of the entire rotating assembly. Addressing the 05G crankshaft shaft seal engine rebuild replacement requirement means evaluating the system, not just the visible leak.
Material Selection and Thermal Demands
Transport refrigeration units face extreme thermal cycling, especially when parked under direct sun or operating in sub-zero cargo holds. The FKM fluorocarbon elastomer resists swelling from R-410A and R-134a refrigerants where standard NBR compounds harden and crack. The hardened stainless steel spring maintains consistent lip pressure across the temperature range of -20°C to +200°C, ensuring the seal tracks minor shaft deflections without losing contact.
Dimensional Tolerance and Surface Finish Requirements
The 38 mm inner diameter is held to ±0.015 mm to guarantee an interference fit that prevents cold flow or galling during pressurization. If the mating shaft surface exceeds Ra 0.4 μm, the seal lip will wear prematurely, generating debris that circulates through the oil system. [NEED_CITE: compressor shaft surface finish standards for dynamic sealing] This is why inspection of the journal is mandatory before pressing in the new component.
The Cost of Overlooking Root Causes
Installing a fresh seal on a shaft with pitting or runout means the next failure is already in motion. I have seen units in mining camps return to the workshop three times in a single season because the underlying bearing wear was never addressed. Each teardown costs labor, refrigerant, and lost cargo integrity. [NEED_CITE: transport refrigeration unit downtime impact on cold chain logistics] A systematic rebuild approach eliminates this cycle.
Why Source Through This Channel
Our technical team confirms the exact seal variant against your compressor serial number, accounting for production run changes. We supply matched gasket and seal sets so the entire job ships as one consignment. The Guangzhou warehouse stocks high-turnover items for fast dispatch, and our quality inspection records document dynamic pressure testing at 2.5 MPa before release. Sample units are available for fitment confirmation before you commit to bulk quantities.
Documentation & Verification
- Commercial invoice detailing 05G seal kit contents and HS codes for customs clearance
- Cross-reference sheet mapping OEM numbers (reference only) to aftermarket equivalents
- Quality inspection record confirming dimensional check and 2.5 MPa pressure test
- Warranty terms covering manufacturing defects for six months from delivery date
- Packing photographs showing seal protection and kit completeness before crate closure
Installation & Rebuild Sequence
- Clean crankshaft journal to Ra ≤ 0.4 μm specification before seal installation
- Verify spring tension and lip orientation match the 05G service manual requirements
- Replace all associated gaskets and O-rings during the same teardown procedure
- Run system for initial break-in period while monitoring for refrigerant migration
Request a Compatibility Confirmation
Provide your 05G compressor serial number and current operating symptoms to receive a verified fitment confirmation. If the nameplate is illegible, share photographs of the existing seal dimensions and mating flange so we can cross-reference the correct variant from our technical database.
Frequently Asked Questions
Q: What else should be replaced when changing the crankshaft shaft seal on a 05G compressor?
A: Best practice involves replacing the complete seal kit including all O-rings, gaskets, and shaft bearings accessible during teardown. Reusing old sealing surfaces invites leak paths that force another full disassembly within months. Matched sets prevent tolerance stacking issues.
Q: How do I confirm the correct seal variant for my Carrier unit serial number?
A: Compressor serial ranges correspond to specific shaft diameters and seal configurations. Provide the serial plate data or photographs of the existing seal dimensions. Our technical team cross-references production records to identify the exact variant, including superseded part numbers.
Q: Does the overhaul kit include all gaskets and seals needed, or are some items sold separately?
A: Complete kits contain every sealing component for the 05G compressor teardown. Individual seals are available for targeted repairs, but we recommend full kits for overhaul jobs to prevent missed leak paths. Specify your rebuild scope when requesting a quote.
Q: What shaft surface condition is required for this seal to perform to specification?
A: The mating shaft journal must meet Ra ≤ 0.4 μm surface finish with no pitting, scoring, or excessive runout. Damaged surfaces require shaft replacement or metal spray and regrind before seal installation. We provide inspection guidance with each order.
Q: How do I identify my compressor model if the nameplate is worn or unreadable?
A: Photograph the compressor mounting pattern, service valve locations, and any visible casting numbers. Shaft diameter measurement and bolt hole spacing often identify the model when labels are missing. Our team maintains reference archives for field identification.
