ADAM
Spare Parts & TiresFree calculator

OEM ↔ Aftermarket Cross-Reference for UA Tractors, Combines + GOST↔ISO Bearings + Buy-Decision Ladder (2026)

Cross-check OEM part numbers to verified aftermarket equivalents (SKF / Donaldson / MANN / Bosch), translate GOST ↔ ISO bearings with the 7524 = 32224 correction, and walk a 7-rule buy-decision ladder. Avoid the 80/20 trap: most parts are OEM-rebadged anyway at 2-5× dealer markup. Dealer-lock + sanctions flags included.

< 2 minFree · No sign-up · Instant

Three tools in one calculator

Lookup an OEM part, translate a GOST bearing, or walk the OEM-vs-aftermarket decision ladder. Every result surfaces sanctions, counterfeit tier, and dealer-lock traps.

Paste a JD / CNH / Claas / Fendt / MTZ / KhTZ / КЗС OEM code or an aftermarket PN (e.g. P551433).
  • RE541922filterMedium (5-15%)
    Primary fuel/water separator — SHARED across JD S780 + NH CR10.90 + Case IH 8250 (Donaldson P551433)
    Fits: John Deere S780 · S780 / NH CR10.90 / Case IH 8250
    Dealer uplift
    1.8-2.4× [VERIFY]
    Aftermarket equivalents
    • DonaldsonP551433
    • MANNWK8187
    • FleetguardFS20076
    • BaldwinBF9891-D
    OEM dealer
    ₴2,400
    Premium aftermarket
    ₴1,000–1,300

How the calculation works

Roughly 80% of the parts inside a John Deere / CNH / Claas / Fendt / MTZ dealer box are re-badged Donaldson, MANN, SKF, Bosch, Gates, or Mahle — the same factory, the same documented L10 life, the same certificate, at 2-5× the price. The remaining 20% is non-negotiable OEM: safety-critical systems (brakes / steering / ROPS), machines still in warranty (≤5 years), dealer-locked components (Bosch IMA injectors, post-MY18 CAN alternators, Fendt Vario TCU, JD DPF, NOx sensors, DEF pumps), and precision CVT / closed-centre hydraulics (Fendt Vario internals, Claas CMATIC, Väderstad Tempo seed discs). This calculator bundles three tools behind one widget. (1) OEM lookup: paste a JD / CNH / Claas / Fendt / MTZ / KhTZ / КЗС OEM code and get Donaldson / MANN / SKF / Bosch equivalents, the UA foundry substitute when one is registered (Velesagro, Motordetal-Konotop, SKF Ukraine Lutsk, DIFA), the dealer-lock flag, the counterfeit tier, and OEM-vs-aftermarket price bands. (2) GOST ↔ ISO bearing translator for legacy MTZ / KhTZ / Don fleets — 26 bearings across 4 families (GOST 8338 deep-groove, 27365 tapered, 8328 cylindrical, 5721 spherical). Surfaces the GOST 7524 = ISO 32224 correction (the Batch 1 table had 30313 by error) and three naming-collision warnings. (3) Buy-decision ladder: 7 rules top-to-bottom — (1) safety-critical → OEM, (2) warranty ≤5 years → OEM, (3) dealer-lock → OEM, (4) precision CVT / closed-centre → OEM, (5) engine wear on sanctioned-origin >15 y → UA foundry, (6) tillage wear → UA foundry, (7) default → premium aftermarket. Cross-tab warnings: sanctions advisory on MTZ / Rostselmash / KAMAZ / YaMZ / D-260 / MZKT / Gomselmash / Belshina / Voltyre / Kirov / Yaroslavl (existing-owner parts flow via grey channel + UA foundry substitutes). Counterfeit exposure: Bosch injectors 30-50%, Magneton starters 25-50%, SKF bearings 15-25%, MANN / Donaldson filters 10-15%, JD-branded filters 15-25%, premium tires 1-2%.

  1. 1

    Pick the tab

    OEM lookup (you have a PN), GOST translate (legacy bearing), or buy-decision ladder (OEM vs aftermarket?).

  2. 2

    OEM lookup: paste the PN

    Paste an OEM (RE541922 / DZ115391 / 240-1109080 / 84228488) or an aftermarket PN (P551433). The normalizer strips spaces / dashes / slashes and matches by exact PN first, then starts-with, then fuzzy over aftermarket equivalents.

  3. 3

    OEM: read the price delta

    Compare ₴OEM dealer vs ₴Premium aftermarket — the 2-5× dealer uplift is shown in a yellow pill. UA foundry substitute (when registered) sits in a green callout. Grey-market price flags render in a red frame.

  4. 4

    GOST translate: pick family + bore

    GOST 8338-75 deep-groove / 27365-87 tapered / 8328-75 cylindrical / 5721-75 spherical / 24696-81 spherical-sleeve. Bore 20 / 25 / 30 / 35 / 40 / 45 / 50 / 60 / 65 / 75 / 85 / 100 / 120 mm.

  5. 5

    GOST: watch for the 7524 correction

    For tapered × 120 mm the calculator surfaces a yellow callout: GOST 7524 = ISO 32224 (120×215×61.5), NOT 30313 as older UA parts catalogs sometimes listed. This is a specific post-2022 correction from Batch 3.

  6. 6

    Buy-decision ladder: fill the 6 inputs

    System type, machine age, warranty, safety-critical flag, dealer-lock flag, precision class. The calculator walks 7 rules top-to-bottom and highlights the one that fires. The verdict card on top shows OEM / aftermarket / UA foundry + a bilingual rationale.

When to use this tool

  • Verify a dealer quote for JD 6155M fuel filter RE541922 = Donaldson P551433 equivalent at 1/3 the price
  • Translate GOST 7524 tractor bearing for a 1980 MTZ repair — avoid the classic 30313 vs 32224 catalog trap
  • Decide OEM vs aftermarket for an out-of-warranty Case IH Puma transmission part
  • Check if a 'Bosch' injector at 50% below market price is likely counterfeit (very_high tier 30-50%)

Limitations

The v0.1 catalog covers the top 15 tractor parts + 9 combine parts + 8 implement brands + 26 GOST↔ISO bearings. The long tail (~2 000 UA-relevant SKUs) lives in the AI agronomist RAG tool layer — ask the Chat for unlisted part numbers. Bearing translation covers the 4 main GOST families; legacy specialty bearings may still need a manual GOST-standard cross-reference. Price bands are a [VERIFY] Q1 2026 snapshot, ex-VAT; pricing moves with EUR/UAH, shipping, and channel. The buy-decision ladder is the 80/20 baseline — a dealer + independent-shop quote is still the right final step on any UAH 50K+ replacement. Counterfeit risk tiers are category-level, not SKU-level — each bag still needs the physical check (MANN Secure QR via verify.scantrust.com, SKF Authenticate app, protect.bosch.com KeySecure). The sanctions list is a 2026 snapshot; re-verify at quote time against war-sanctions.gur.gov.ua + sanctionsmap.eu. YMYL: a single mis-sourced IMA-coded Bosch injector (UAH 15-28K OEM vs UAH 6-9K grey) can cost UAH 200K+ in downstream DPF replacement + limp-mode downtime.

Frequently asked questions

Why is the 'OEM' filter often cheaper elsewhere?
Because it's the same filter. OEM brands (John Deere, CNH, Claas, Fendt, Caterpillar) mostly don't produce filters themselves — they buy them from Donaldson, MANN-Hummel, Fleetguard, Baldwin, Hengst, or WIX and re-label them. JD RE539279 ≡ Donaldson P551808; JD RE541922 ≡ Donaldson P551433 (Batch 2 documents how a single Donaldson P551433 cartridge services JD S780 + NH CR10.90 + Case IH 8250 — three brands, one filter). The dealer markup on that rebadging is 2-5×. Buying directly from Donaldson / MANN gets you the same physical part, the same L10 life, the same certificate — just without the dealer margin. This is Rule 7 in the ladder, the 80% case.
What's a 'diagnostic lock' and how does it affect my choice?
A diagnostic (or dealer) lock is a component that needs a dealer tool (JD Service ADVISOR + EDL, CNH EST + DPA5, Claas CDS, AGCO EDT + FenDias) to activate after install. Examples: Bosch common-rail injectors need IMA/IQA/ISA codes; post-MY18 CAN alternators, Fendt Vario TCU, JD DPF, NOx sensors, and DEF pumps all need authenticated writes. Aftermarket parts fit mechanically but don't communicate with the ECU → limp mode (40% power) until a dealer visit. If the calculator flags dealer-lock in red, it's OEM channel only (Rule 3). Chinese EDL clones at USD 200-500 exist, but carry OTA-bricking risk (May 2022 precedent: Agrotek remote-disabled 27 stolen tractors in Chechnya; the 2023 US Right-to-Repair MOU has no legal force in Ukraine).
GOST 7524 — is it 30313 or 32224?
It's 32224. A 120×215×61.5 mm single-row tapered roller bearing. Older UA parts catalogs sometimes listed 30313 by error — that was a mapping mistake in the Batch 1 table. The correct value per GOST 27365-87 (single-row tapered rollers) and ISO 355 is GOST 7524 = ISO 32224 — the heavy-duty series for bores above ~100 mm. ISO 30313 is a different code entirely: it's the ISO equivalent of GOST 7313 (65×140×36 mm). The calculator surfaces the correction in a yellow callout whenever you select the tapered family at 120 mm bore. This is a common trap on heavy disc cultivators and combine grain-loader trunnions: order 30313 when you needed 32224 and the part physically won't fit the housing — UAH 200-500 in scrap plus a 2-week downtime window.
How do I spot a counterfeit Bosch injector?
Six markers (Batch 3 §A4 + Batch 1 §NH T7.165). (1) Acetone test on the laser data-matrix: a real Bosch code is laser-etched and survives acetone; an ink-jet print wipes off with a cotton swab. This alone catches ~80% of fakes. (2) KeySecure 16-digit code (post-2018): scan at protect.bosch.com. A green 'first scan' = genuine; a yellow 'scanned many times' = counterfeit (someone else already scanned that same code on a different parcel). (3) Price under 50% of dealer ≈ automatic fail. A real Bosch 0445120348 for the NH T7.165 / Case IH Puma sits at UAH 12 000-22 000 in premium aftermarket and UAH 15 000-28 000 at the OEM dealer; anything below UAH 9 000 is a grey-market flag. (4) Repeated IMA codes across a 4-pack: real injectors have unique factory-lasered codes. (5) Packaging: real Bosch has a hologram, a serial number, and an EU or Japan origin; 'Made in PRC' with a 'Bosch' stamp is fake. (6) If it fits mechanically but stays in a fault code after CNH EST IQA/ISA coding → 99% counterfeit. Return + file a chargeback. On a 500-ha operation with 2-3 combines, this is a UAH 200K+ exposure per injector.

Sources & references

  1. 1Donaldson part finder — OEM cross-reference (oil / air / fuel filters)
  2. 2SKF Authenticate — bearing counterfeit verification (covers FAG, NSK, NTN, Koyo, Timken)
  3. 3MANN-FILTER Secure — ScanTrust QR verification
  4. 4Bosch KeySecure — injector + diesel-component authentication
  5. 5Війна та санкції (GUR of Ukraine) — official sanctions registry for MTZ / Rostselmash / YaMZ / Belshina etc.
  6. 6EU sanctions map — cross-check for Belarusian / Russian parts origins
Weekly briefing

Get the Monday morning farmer briefing.

Seasonal timing alerts, price-window flags, authoritative agronomic reads — 3 links, every Monday.

Free. No spam. Unsubscribe in one click.