Iseki TU320 Parts Catalog – Factory OEM Parts Breakdown

If you’ve ever stared down a Iseki TU320 Parts Catalog listing and still ordered the wrong filter because you guessed the drive configuration, you know what I mean. This factory document kills that guesswork. 298 pages of OEM part codes, interchangeability symbols, and model-type breakdowns that actually match what’s bolted to your tractor. No aftermarket reinterpretation – just the original Iseki data as printed in Japan for the TU320 tractor line.

Parts Catalog Conventions – Read This Before You Order

The first few pages of this catalog explain how Iseki structures their part numbers. For example, parts starting with ‘V’ or ‘W’ are standard market parts – not special-order. LH and RH are described relative to the machine’s forward travel direction. Quantity column uses ‘M’ for meter-length supply, ‘l’ for liter, and ‘AR’ for adjust-as-required. These aren’t guesses – they’re factory rules. Ignore them and you’ll end up with a suction filter for a 2WD when you own a 4WD model.

Model Codes and Compatibility – Know Your TU320 Variant

Every TU320 tractor carries a model type code that dictates which parts fit. The catalog lists T for 2WD, F for 4WD, H for HST (hydrostatic transmission – not standard transmission), M for mid-PTO, U for power steering, and B for local fitted cab. Then there are tire codes (Agri vs. turf) and area codes (E2 for Germany, E4 for England/Scandinavia, E5 for France/Italy, E6 for Oceania). Page 2 lays this out in a table. If your tractor came from Australia (E6) and you’re trying to use a part listed for E4, stop. The catalog’s model-type columns (TF15, TF17, TF19, T, HC) tell you exactly which assembly each part belongs to.

Interchangeability Symbols – What OLD ← NEW Actually Means

Iseki uses seven symbols under ITC (Interchangeability) to show whether new parts replace old, old replace new, or they’re not swappable. A left arrow (OLD ← NEW) means you can use the new part in place of the old. Right arrow (OLD → NEW) means old parts work in place of the new. Double arrow (OLD ←→ NEW) means they’re not interchangeable – don’t try. This is the kind of detail that prevents you from buying a $200 hydraulic filter that doesn’t thread on. The catalog also marks parts with symbols: * for standard parts, ‘T’ for optional installation, ‘R’ for replacement parts. Ignore these and you’re gambling.

Color Codes and Paint Specifications

Colored parts get a color code number in the catalog, and page 4 includes a color table with spray-type code numbers (e.g., 1300-952-001-10 for Cosmo Blue) and even drum paint quantities. If you’re restoring a TU320 and need the correct factory shade, this section saves you three trips to the paint store. The catalog also lists SET parts – components that must be replaced as a group – with references to the relevant figure number in the Remarks column.

One paragraph that’s short: Get the right filter, not a filter that might fit. The REMARKS column shows alternate manufacturer codes and figure numbers for assembly breakdowns.

Real-world example: page 2 shows a suction filter assembly (1614-508-200-00) with O-ring V721-103-103-50, listed for TF15 and T models. The catalog tells you the exact QTY, model type, and even the figure reference. You can hand that to a parts counter guy and walk out with the right box every time. For related manuals, check the Iseki TS3110 Parts Catalog – Factory OEM Parts Breakdown if you’re working on a different chassis. For HST variants of the same family, see Iseki TXG23 TXG23FH TXG23TH TXG23E 2003 Parts Catalog and Iseki TXG23 Parts Catalog – Factory OEM Parts Breakdown. Those cover different model codes but use the same Iseki parts catalog standards.

Why OEM Parts Catalog Beats Aftermarket Cross-Reference

Aftermarket parts books guess at compatibility. This factory catalog lists every part that Iseki approved for the TU320 platform. If you’re a shop owner trying to reduce comeback time, or a home mechanic who doesn’t want to pull the transmission twice, this 298-page document is the difference between a one-hour job and a three-hour parts chase. The Automotive Industry Overview might give you background on manufacturing standards, but this catalog gives you the specific numbers. For a more general take on how OEM documentation shapes repair reliability, read the Automotive Industry Overview. But for the TU320, you need this catalog.

Frequently Asked Questions

Does this catalog cover both 2WD and 4WD TU320 models?

Yes. The model-type columns (T for 2WD, F for 4WD) are listed for every part. Page 2 explains the codes, and each part row specifies which model variant gets that part.

Are torque specs included in this parts catalog?

No. This is a parts catalog, not a service manual. It lists part numbers and interchangeability data. Torque specs belong in the factory service manual for the TU320.

What do the interchangeability symbols mean?

Iseki uses three set symbols: OLD ← NEW (new part fits old assembly), OLD → NEW (old part fits new assembly), OLD ←→ NEW (not interchangeable). The catalog also marks standard parts with *, optional with T, and replacement with R. The exact definitions are on page 3.

Can I use this catalog to order parts for a TU320 with a cab?

Yes. Model code ‘B’ indicates local fitted cabin. Parts specific to cab versions are called out with the appropriate model-type code. Check the column headings – parts marked with HC or relevant area codes will apply.

You need this on your tablet or printed out before you crack open the TU320. The factory part numbering system is consistent – once you know the conventions, you’ll order right the first time. Download the Factory Manual now from AutoRepairManuals and keep your tractor running without the parts-run circus.