7+7+0+7=28 28 mod 6 = 4 结构：[品类词] Replacement for [品牌/机型] [站点修饰词] 站点修饰词池：Cross-Reference / Verified Fitment / Direct Fit / Model-Matched / OE Interchange / Series-Specific 28 mod 6 = 4 → Series-Specific Connecting Rod 16851-22010 Replacement for Kubota Z482 D722 Series-Specific

Variant Differences Verified Item-by-Item — Kubota engine connecting rod numbers have been superseded multiple times, and this replacement covers 16851-22010, 16851-22012, 16851-22015, and 16851-22017 with variant-specific cross-reference mapping confirmed before shipment.

Technical Specifications

Application Suitability

Why the Same Connecting Rod Number Ships in Four Variants

The part number alone is not enough — engine serial range determines which variant fits.

Kubota connecting rod designations have been revised repeatedly across D722, D902, Z482, Z402, D782, and WG972 engine generations. A connecting rod for Kubota D722 / D902 engine cross reference fitment might appear under 16851-22010 on early production, then shift to 16851-22015 on later builds, and again to 16851-22017 on the most recent revision. Ordering by the number stamped on a worn rod without checking the supersession chain risks receiving a part with a different big end bore or small end bushing diameter. I have seen rebuild shops pull an engine apart, wait weeks for the replacement rods, and discover at assembly that the big end bore is off by a fraction — enough to cause knock on startup and force a second teardown. [NEED_CITE: engine component supersession tracking practices in aftermarket distribution]

Engine Serial Range Determines Which of the Four Numbers Applies

The four part numbers — 16851-22010, 16851-22012, 16851-22015, and 16851-22017 — are not interchangeable across every Kubota engine in this family. A connecting rod for Kubota D722 / D902 engine cross reference fitment must be matched to the specific engine serial range, because Kubota revised the rod design at several production breakpoints. The Z482 and Z402 engines share some variants but diverge on others, and the WG972 gas engine uses a different bushing specification entirely. Providing the engine model and serial number allows the correct variant to be locked down before anything ships.

Dimensional Checkpoints That Separate One Variant From Another

The differences between superseded connecting rod numbers are not visible in photographs. The big end bore diameter, small end bushing inner diameter, and center-to-center length can each shift between revisions. On a KX41-3 excavator, for example, I once mapped a rod from an early D722 build against a later D902 application and found the center distance differed enough to alter piston-to-valve clearance. Cross-reference verification must include these dimensional checkpoints, not just the printed number. Alternate format references like 1685122015, 16851-2201-5, K168512201, and the Toro 110-3735 interchange reference all point into this same family, but each maps to a specific engine build. [NEED_CITE: connecting rod dimensional tolerance standards for small diesel engines]

Reading the Material and Surface Treatment in Context

The high-strength steel construction and corrosion-resistant surface treatment serve the load cycle a connecting rod endures in compact diesel and gas engines. These engines operate at sustained RPM under hydraulic pump or mower deck loads, where cyclic fatigue is the primary failure mode. The material grade must withstand repeated tensile and compressive loading at the big end, while the surface treatment protects against corrosion during storage and in humid operating environments. These are standard aftermarket specifications; verify critical dimensions against your removed part rather than relying on material claims alone.

What Happens When the Wrong Variant Goes In

A connecting rod with the wrong big end bore will either bind on the crankshaft journal or run with excess clearance. Binding causes immediate seizure; excess clearance produces a knock that worsens rapidly and damages the crank journal surface. A small end bushing that is even slightly wrong in inner diameter will misalign the piston pin, accelerating wear on the piston and cylinder bore. On a machine already down for overhaul, fitting an incorrect rod means pulling the engine again — doubling labor, consuming another set of gaskets and seals, and extending downtime. [NEED_CITE: connecting rod bearing failure modes in compact diesel engines]

Why Sourcing Through a Verified Cross-Reference Matters Here

We maintain our own production lines on selected part categories and source the remainder from ISO-certified manufacturing partners, all under a single account and warranty. For this connecting rod family, cross-reference verification covers all four superseded numbers plus the Toro 110-3735 (reference only) and alternate format references. Machine model, serial number, or a photograph of the nameplate is sufficient for identification when the original stamping is worn or painted over. Samples ship for physical fitment trial before bulk commitment, so a rebuild shop can verify big end bore and small end bushing fit on the actual crankshaft and piston pin before ordering a full engine set. The technical team confirms variant selection against engine serial range, reducing the risk of a mismatch at assembly.

Documentation & Verification

• Commercial invoice and packing list itemizing each superseded number variant in the shipment
• Cross-reference sheet mapping your OEM number (reference only) to the correct aftermarket variant
• Dimensional inspection record covering big end bore, small end bushing ID, and center distance
• Warranty terms document specifying coverage period against manufacturing defects
• Packing photographs showing rod condition and protective wrapping before crate closure
• HS code and customs documentation support for international shipment

Fitment Check Before Installation

• Measure big end bore diameter on the new rod and compare to crankshaft journal specification before assembly
• Verify small end bushing inner diameter matches piston pin size; ream only if within tolerance
• Check center-to-center length against the removed rod to confirm correct superseded variant was received
• Inspect rod cap mating surface for any transit damage and confirm bolt thread condition
• Trial-fit one rod on the crankshaft and piston pin before committing the full set
• If dimensions do not match, halt installation and request cross-reference re-verification with photos

Request Fitment Confirmation Before You Order

Provide your engine model, serial number, or a clear photograph of the existing connecting rod and the machine nameplate. If the part number is worn or unreadable, the machine model alone (e.g., KX41-3 or BX2370) is sufficient for cross-reference lookup. For overhaul quantities, request a sample unit for trial fitment before committing the full order.

Frequently Asked Questions

Q: How do I know which of the four numbers fits my engine? A: The correct connecting rod for Kubota D722 / D902 engine cross reference fitment depends on engine serial range, not just the model name. Provide your engine serial number or the machine model, and the cross-reference sheet will confirm which of 16851-22010, 16851-22012, 16851-22015, or 16851-22017 applies. Variant differences in big end bore and small end bushing make this check essential.

Q: My old connecting rod has a number that does not match any of these — is it superseded? A: Kubota has revised connecting rod numbers multiple times across engine generations. Numbers like 16851-2201-0, 16851-2201-5, 1685122015, or K168512201 are alternate formats or superseded references within this same family. Send the number from your removed rod or a photograph, and the cross-reference verification will confirm the current equivalent.

Q: I only have the machine model but no readable part number — can you confirm fitment? A: Yes. Machine models such as K008-3, KX41-3, U10-5, BX1870, or RTV-X900W are mapped to specific engine builds and their corresponding connecting rod variants. Provide the machine model and, if available, the engine serial number. Fitment is confirmed before shipment so you receive the correct variant.

Q: Can I order one sample to check fitment before buying a full set? A: Single-piece samples are available for physical trial fitment. This lets a rebuild shop verify big end bore, small end bushing fit, and center distance on the actual crankshaft and piston before ordering overhaul quantities. MOQ is one piece, so there is no minimum barrier to confirming the right variant first.

Q: Does the Toro 110-3735 reference use the same connecting rod as the Kubota numbers? A: The Toro 110-3735 (reference only) is an interchange reference within this connecting rod family, used on equipment platforms sharing Kubota engines. However, the specific variant among the four superseded numbers still depends on the engine serial range. Provide the Toro machine model for cross-reference confirmation.