Description

Zetor 3321, 3341, 4321, 4341, 5321 2003 Parts Catalog

I’m Mike Callahan, 28-year ASE Master Tech. I’ve seen too many jobs stop dead because a parts guy cross-referenced the wrong bearing or a farmer ordered a clutch disc that didn’t fit. That’s why I don’t trust aftermarket parts catalogs. This Zetor 3321, 3341, 4321, 4341, 5321 2003 Parts Catalog is the factory document – 408 pages of original OEM part numbers, exploded diagrams, and group indexes. If you’re trying to rebuild a Zetor Super tractor without this, you’re guessing. And guessing costs time and money.

Engine Group Coverage: Crankcase to Cylinder Head

The engine section starts on page 18 with “002 KLIKOVÁ SKŘÍŇ” (crankcase) and moves through “003 KLIKOVÉ ÚSTROJÍ” (crankshaft assembly), “04 ROZVOD” (timing), “005 HLAVA VÁLCE” (cylinder head), “07 MAZACÍ SYSTÉM” (lubrication system), and “009 PALIVOVÝ SYSTÉM” (fuel system). Page 26 shows the crankshaft assembly breakdown. Each group lists every bolt, seal, and gasket with the OEM part number. Need a piston ring set for a 4321? It’s there. The catalog also includes the injection pump subsystem (009a) and the mechanical governor (009b) on page 47 and 51 respectively. This is not a repair manual – it’s a parts bible. But you can’t order the right part without it.

Transmission and PTO – 7 Subsystems Documented

Starting on page 77, the transmission section covers “122 SKŘÍŇ PŘEVODOVKY” (gearbox housing), “122a PŘEVODOVÉ ÚSTROJÍ” (gearing), “126 NÁSOBIČ TOČIVÉHO MOMENTU” (torque multiplier), “128 REDUKTOR PRO PLAZIVÉ RYCHLOSTI” (creeper gear reducer), “129 REVERZACE” (reverser), and “131 132 VÝVODOVÝ HŘÍDEL” (PTO shafts at 540/750/1000 rpm). Seven distinct breakdowns. If you’ve got a 5321 Super with a bad PTO bearing, you need to know which bearing – the catalog gives you the exact Zetor part number, not a generic interchange. I’ve seen too many guys order a “universal” PTO shaft and end up with a weekend wasted.

Does This Manual Cover the Fuel Injection Pump?

Yes. Section “009a VSTŘIKOVACÍ ČERPADLO” runs from page 47. It includes the injection pump assembly, the delivery valves, and the hydraulic head parts. The “009b MECHANICKÝ VÝKONNOSTNÍ REGULÁTOR” starts on page 51 – that’s the mechanical governor. If you need the fuel lift pump, that’s “009d DOPRAVNÍ ČERPADLO” on page 56. The catalog also covers the pre-filter and single-stage filter (009c and 009e). One place, all parts listed. No flipping between aftermarket cross-references that show a different pump.

408 Pages of Factory Part Numbers

This is a 2003 publication, so it’s the final OEM revision for the Super series. 408 pages of part numbers in Czech, German, English, French, and Spanish. The English column is there – you don’t need to learn Czech. I’ve used these catalogs for years. The indexing is by group number, not alphabetically. You get used to it. The benefit: every part number is verified by the manufacturer. There is no “equivalent” or “substitute” unless Zetor says so. That’s the only way to avoid ordering a wrong main bearing for a 3341 and then having to pull the crank again.

Why OEM Beats Aftermarket Cross-Reference

I don’t care how good your aftermarket catalog software is. It will not show you the difference between a 3321 and a 4321 crankshaft seal if the geometry changed slightly. The OEM catalog does. One example: the clutch group “11 SPOJKA DVOJITÁ” on page 60 lists the exact dual-clutch assembly for each model. An aftermarket listing might lump them together. That’s how you end up with a clutch that doesn’t disengage. This catalog gets you the right part the first time. And if you’re working on a 7341 Super turbo, the turbocharger section “15 PŘEPLŇOVÁNÍ Z 7321, 7341” is on page 73. The water pump is on page 75. All factory.

For more background on diesel engine fundamentals, see the Internal Combustion Engine article. And if you’re interested in the broader agricultural machinery sector, the Automotive Industry Overview provides context.

Frequently Asked Questions

What years does this catalog cover?

This is the 2003 edition, which covers all Zetor Super tractors from the early 2000s production run. It includes models 3321, 3341, 4321, 4341, 5321, and also 5341, 6321, 6341, 7321, 7341.

Does it include part numbers for the 5321?

Yes.

Can I use this for the 7341 Super turbo?

Yes. The catalog explicitly includes the 7321 and 7341 Super turbo models, with a dedicated section for turbocharging on page 73. The water pump and other components are listed separately.

Is the manual in English?

The catalog is multilingual: Czech, German, English, French, Spanish. The English column is clearly labeled, but the headings and group names are in Czech. That’s standard for OEM Zetor catalogs. You navigate by group number, not language. The part numbers are the same regardless of language. If you need a part name in English, it’s there in the third column. For example, ‘KLIKOVÁ SKŘÍŇ’ is ‘crankcase’ in English. So if you can follow a numbered list, you’ll find what you need. It takes a few minutes to get used to, but once you understand the group numbering, you can find any part. The English translation is provided for each group title.

If you work on multiple Zetor models, you might also need the Zetor Super Parts Catalog – OEM 102-Page Tractor Parts Breakdown for the earlier Super versions, or the Zetor 5711-6711 Parts Catalog 1976 | OEM Factory Manual for older series. And of course, this same 2003 catalog is referenced as Zetor 3321 3341 4321 4341 5321 Parts Catalog 2003 – it’s the one you’re looking at now.

Stop ordering parts blind. Access the Factory Manual and get the exact Zetor part numbers before you turn a wrench.