Matched Rebuild Sets — Connecting rod 17311-22014 ships with verified bearing grade and piston match based on your crankshaft journal measurement history.
Technical Specifications
| Parameter |
Value |
| Part Number |
17311-22014 |
| Product Type |
Connecting Rod |
| Cross-Reference |
17311-22012, 17311-22013, 17331-22010 (reference only) |
| Machine Fitment |
Kubota KX91-3, KX121-3, KX161-3, L3400DT, M4900DT, U35, U45S |
| Condition |
New Aftermarket |
| Warranty |
3-12 Month |
| Engine Compatibility |
Kubota D1403, D1703, D1803, V1903, V2003, V2203 |
Application Suitability
| Engine System |
Related Components |
| Cylinder Block Assembly |
Con rod bearings, main bearings, thrust washers |
| Piston and Ring Group |
Piston pin, circlips, compression and oil rings |
| Lubrication Circuit |
Oil pump, relief valve, crankshaft journal condition |
| Cooling and Thermal Load |
Cylinder head gasket, overhaul seal kit |
Why Engines Come Back After a Bottom-End Rebuild
Sending a connecting rod for a Kubota D1703 engine rebuild without confirming crankshaft journal history leads to mismatched bearing clearances and repeat failures within hours of restart.
In our workshop experience across Shandong, teardowns often reveal that a previous mechanic already ground the crankshaft to an oversize dimension, yet the next rebuild kit arrives with standard-grade shells. The oil film collapses under load. Rod knock follows almost immediately. A connecting rod replacement must be paired with measured journal data and the correct bearing grade, otherwise the Connecting Rod engine rebuild becomes an expensive cycle of repeated disassembly [NEED_CITE: engine bearing clearance standards for diesel overhaul].
Matching the Rod to the Engine Build History
Every Kubota V2203 or D1803 that enters a rebuild bay carries its own service history. Some blocks have never been opened; others have seen two or three overhauls with progressive crankshaft grinding. The connecting rod itself must match the piston weight class and the bearing shell grade selected for that specific journal diameter. When sourcing a Connecting Rod engine rebuild component, the rod bushing bore and big-end diameter must align with the pin and crankshaft dimensions currently in the block, not the dimensions listed in a factory manual for a zero-hour engine.
Superseded Numbers and Serial Variants
Kubota has revised the 17311-22014 connecting rod designation across production runs, with earlier references including 17311-22012 and 17311-22013. Engines from different serial ranges within the D1703 and V1903 families may require different rod bolt torque specifications or bushing interference fits. Cross-reference verification against the engine serial plate prevents installing a rod variant that physically fits but operates outside intended clamping load [NEED_CITE: Kubota engine serial variant identification for D and V series].
Dimensional Grades and Crankshaft Journal Condition
The connecting rod big-end bore must accept the correct bearing shell thickness to achieve specified oil clearance. Available in STD, 0.25 and 0.50 oversize configurations, the selection depends entirely on measured crankshaft journal diameter after any prior grinding. Installing a standard rod with standard bearings on a journal that was previously ground to 0.25 results in excessive clearance, low oil pressure, and rapid shell wear. Each Connecting Rod engine rebuild demands micrometer measurement before any parts are ordered.
The Cost of Skipping Root-Cause Diagnosis
A connecting rod rarely fails on its own. Oil starvation from a clogged pickup screen, a collapsed bearing shell from contaminated lubricant, or chronic overloading beyond the engine rating all produce rod damage that looks identical on the bench. Replacing the rod without addressing the underlying fault guarantees the new component will fail in the same manner. Shops that skip system-level diagnosis during a Connecting Rod engine rebuild absorb the cost of a second teardown, new gaskets, and lost machine availability [NEED_CITE: diesel engine connecting rod failure root cause analysis].
Sourcing from a Single Accountability Point
XUNPO produces selected engine component lines in-house and sources the remainder from qualified ISO-certified manufacturing partners, with both carrying identical quality control and warranty terms. Eight product categories allow a complete D1703 overhaul kit — rods, bearings, pistons, gaskets, seals — to ship under one account and one consignment. Minimum order starts at one piece for emergency single-cylinder repairs. Guangzhou warehouse stock enables fast dispatch on common items. The technical team confirms bearing grade, cross-reference accuracy, and engine serial compatibility before dispatch, reducing fitment surprises on the rebuild bench.
Documentation & Verification
- Commercial invoice listing rod part number and matched bearing grades
- Cross-reference sheet confirming 17311-22012 and 17311-22013 interchange (reference only)
- Dimensional inspection record for big-end bore and bushing ID
- Warranty terms covering material and manufacturing defects
- Packing photographs showing rod protection and kit consolidation
- HS code and customs documentation for international engine parts shipment
Installation & Rebuild Sequence
- Verify crankshaft journal diameter with micrometer before selecting bearing grade for the 17311-22014 rod
- Match piston pin diameter to rod bushing bore; replace bushing if interference fit is out of tolerance
- Torque rod bolts to Kubota specification in staged increments using calibrated tooling
- Check big-end bearing clearance with Plastigauge before final assembly of the Connecting Rod engine rebuild
- Prime lubrication system and verify oil pressure at idle before applying load during initial run-in
Request a Matched Rebuild Quote
Provide your engine model, serial number, and any known crankshaft grinding history so we can confirm the correct connecting rod variant, bearing grade, and matched overhaul components for your specific Kubota D1703 or V2203 build.
Frequently Asked Questions
Q: What oversize grade do I need if the crankshaft has already been ground?
A: The correct grade depends on the current measured journal diameter, not the original specification. If the crankshaft was previously ground to 0.25 mm oversize, you need 0.25 undersize bearing shells paired with the connecting rod to maintain proper oil clearance. Always measure before ordering rebuild components.
Q: Does the overhaul kit include the correct con rod bearings for my engine serial?
A: We verify the engine serial number against the applicable bearing specification and cross-reference list before packing. The overhaul kit contents are reviewed to confirm that rod bearings, main bearings, and gaskets all match the same engine build variant, preventing mismatches on the rebuild bench.
Q: How do I confirm which superseded part number applies to my D1803 or V2003?
A: Provide the engine serial number from the identification plate. We cross-reference it against the superseded number chain including 17311-22012, 17311-22013, and 17311-22014 (reference only) to confirm which variant your specific engine requires, then verify dimensional compatibility before shipment.
Q: What else should I replace when one connecting rod has failed?
A: Inspect the crankshaft journal for scoring, check the oil pump and pickup screen for blockage, and examine remaining rod bearings for shell collapse. Replace the matched bearing set and overhaul gaskets at minimum. Addressing only the damaged rod without diagnosing oil starvation or contamination leads to repeat failure.
Q: Can I order a single rod and bearing set without a minimum order quantity?
A: Yes. Single-piece orders are accepted for emergency repairs where only one cylinder requires attention. The rod and matched bearing set ship together from Guangzhou warehouse stock, with cross-reference verification completed before dispatch to ensure fitment accuracy on your specific engine serial.
