Upper Con Rod Bearing 1004027FE010XZ STD for JAC N56 Sunray SOLLERS Atlant 2.7D 4DE1-1D — Verified OEM
Key Attributes
Product Summary
Verified OEM upper con rod bearing 1004027FE010XZ STD for JAC N56/Sunray/SOLLERS Atlant 2.7D 4DE1-1D Euro 5. Steel backing with anti-friction alloy overlay, ±0.005mm wall tolerance, 99.4% fitment success. Pairs with lower bearing 1004021FE010XZ. 6-month warranty, neutral or custom packaging.
Product Details
Upper Con Rod Bearing JAC N56
,STD Con Rod Bearing 4DE1-1D
,OEM Con Rod Bearing Sunray Atlant
The Upper Con Rod Bearing with OEM number 1004027FE010XZ is a verified direct-fit replacement for JAC N56, JAC Sunray, and SOLLERS Atlant trucks equipped with the 4DE1-1D 2.7D diesel engine (Euro 5). This is the upper half bearing, installed in the connecting rod big-end, forming the sliding surface for the crankshaft journal together with the lower bearing (1004021FE010XZ). It is critical for maintaining oil clearance and preventing metal-to-metal contact under combustion loads.
- Material Verified: Steel backing with anti-friction alloy overlay (aluminum-tin or equivalent) — verified by metallurgical inspection across 50+ production batches.
- Dimensional Accuracy: Wall thickness tolerance within ±0.005 mm — verified by precision micrometer on 100% of finished goods.
- Installation Success Rate: 99.4% proper fitment and oil clearance — confirmed across 300+ engine rebuild orders with zero sizing returns.
- OEM Cross-Reference Verified: Replaces JAC upper bearing 1004027FE010XZ. Pairs with lower bearing 1004021FE010XZ (sold separately).
- Deep metallic knocking from the lower engine block, especially under load or when cold.
- Oil pressure warning light or gauge reading dropping below specification.
- Metal debris or shimmering particles found in engine oil.
| Feature | Benefit + Verification Signal |
|---|---|
| Anti-Friction Alloy Overlay | Reduces friction and wear under high combustion loads — verified by 500-hour engine dynamometer testing. |
| Precision Wall Thickness (±0.005 mm) | Ensures correct oil clearance and prevents bearing seizure — verified by 100% micrometer inspection. |
| Locking Tab Design | Secures bearing in rod groove, preventing rotation — verified by assembly fit test on OEM connecting rods. |
| Exact OEM Geometry | Direct drop-in replacement, no modification required — verified by CMM comparison against OEM sample. |
| QC Item | Verification Method |
|---|---|
| Wall Thickness | Precision micrometer (±0.005 mm tolerance) |
| Bearing Length | Caliper measurement against OEM specification |
| Material Hardness | Hardness tester (meets OEM alloy specification) |
| Surface Finish | Profilometer (ensures optimal oil retention) |
| Locking Tab Fit | Assembly test on OEM connecting rod |
| Oil Clearance | Plastigauge verification during trial assembly |
- Clean connecting rod big-end and bearing surfaces thoroughly before assembly.
- Install upper bearing (1004027FE010XZ) into rod; ensure locking tab seats correctly in groove.
- Install lower bearing (1004021FE010XZ) into rod cap.
- Lubricate bearing surfaces with clean engine oil.
- Check oil clearance using Plastigauge — must be within OEM specification.
- Torque connecting rod bolts to OEM specification using a calibrated torque wrench.
- Rotate crankshaft by hand to confirm smooth rotation without binding.
- Monitor oil pressure and listen for lower-end knocking at regular service intervals.
- Replace bearings during any engine overhaul or when oil pressure drops below specification.
- Anti-rust paper + individual box + export carton.
- Suitable for: Engine rebuilders, wholesalers, fleet maintenance centers.
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