Description

Iseki TE4270, E20, 40, 50 Parts Catalog

You are rebuilding a TE4270 engine and the head gasket is leaking. The aftermarket parts book you grabbed says “compatible” but the bolt pattern is off by half a millimeter. That’s a waste of a Saturday and a ruined cylinder head. The difference between a job that holds and a job that leaks comes down to using the right part number the first time. This Iseki TE4270, E20, 40, 50 Parts Catalog is the original factory document from Iseki – not a reprint, not a third-party guess. It is the same 186-page book the dealer parts counter uses. If you need to identify a piston ring, a timing gear, or a fuel injector line, the numbers here are the ones that fit.

Cylinder Head and Block – Figure 1 and Figure 2 Coverage

Page 1 starts with the cylinder head. Every valve, guide, and seal is listed with a 12-digit Iseki code. The same for the cylinder block on page 3 – you get the liner part number, the main bearing cap bolts, and the freeze plug sizes. No “refer to similar model” nonsense. If your engine is an E40 (E3E1-B03K) the parts listed are the exact ones Iseki put in the crate. The catalog uses exploded-view figures so you can see how the oil pan (Fig. 4) and oil pump (Fig. 5) stack together. That alone saves you time because you don’t have to tear down twice to figure out you missed a thrust washer.

Engine Overhaul: Pistons, Valves, and Timing Gear

Going deeper into the short block? Figure 6 covers the piston assembly – rings, wrist pin, and circlip. Figure 7 lays out the valve mechanism: rocker arms, pushrods, and valve springs. The timing gear case on Figure 3 shows the cam gear, crankshaft gear, and idler. Each part gets its own reference number. The manual also includes interchange symbols (N-O for new can replace old, N for not interchangeable). That is critical when you order a camshaft and need to know if the new part fits an older TE4270 block. I have seen guys order the wrong timing gear set because the aftermarket catalog merged two revisions. This catalog keeps them separate.

7 Systems Covered: Fuel, Electrical, Hydraulics

The chassis section (starting at page 37) breaks down the radiator, air cleaner, muffler, bonnet, frame, and steering. Figures 26 and 27 show the power steering and front axle for 2WD and 4WD. The front transmission case (Fig. 34) and gear sets (Fig. 35–37) are all there. If you are swapping a clutch, Figure 41 gives the clutch disc and pressure plate part numbers. The fuel system (Fig. 12) and injection pump (Fig. 14, 18) are covered with internal parts like plunger and delivery valve. The electrical section (Fig. 15) lists the starter and generator components. Having the factory part number for a 12V-35A generator diode means you order the right diode instead of buying a whole new unit.

Source Validity: Why OEM Documentation Matters

This is a scan of the original Iseki parts catalogue printed in Tokyo, Japan. It was never intended for the aftermarket. The part numbers are computer-controlled 12-digit codes – the same system Iseki uses today. When you call a dealer and say “I need part 123456789012” they pull it. If you show up with a generic description they shrug. The catalog also includes a “How to Use” section (page 2) that explains the Ref. No., Parts No., Description, Quantity, and Remarks columns. There is a full abbreviation list so you know “ASSY” means assembly, “BKT” means bracket. This is the standard that keeps parts ordering from turning into a guessing game. Automotive Industry Overview and Automotive Industry Overview both reference the wider context of OEM parts documentation – but this manual is the real deal, not a Wikipedia summary.

Who Needs This Catalog?

If you own an Iseki TE4270, E20, E40, or E50 tractor and you do your own repairs, this catalog belongs in your shop. Same if you run a small ag shop and customers bring in old Iseki models. The parts breakdown covers both 2WD and 4WD versions. A beginner can use the exploded views to see how the front axle (Fig. 28) comes apart. A professional mechanic uses it to quote the exact bearing for a final case (Fig. 30). Even if you have the service manual, you need the parts catalog to order the correct seal or gasket. Without it you are measuring and guessing, which costs money every time you get it wrong. Related manuals worth checking: Iseki TE4270 Tractor Parts Catalog (this one), the ISEKI TRACTOR TE4270 Operator’s Manual, and ISEKI Parts Catalogue for TRACTOR Models for other series.

FAQ

Does this catalog include torque specifications?

No. This is a parts catalog, not a service manual. It lists part numbers, quantities, and assemblies. Torque values are found in the factory service manual.

Can I use this catalog to identify parts for an E20 model that has a different engine code?

The catalog covers models E20, E40, and E50 for the TE4270 chassis. Each engine section is labeled (e.g., E40 uses E3E1-B03K). If your engine code matches one of the figures, the part numbers are correct. If not, you need the specific catalog for that engine variant. Check the Fig. numbers in the table of contents to see if your model is listed. If it is not, the page references will not apply.

You have the tractor, you have the tools. Now get the part numbers that match the factory build. Access the Factory Manual and keep this 186-page reference on your tablet or printed out. Every time you order a part, you know it is the right one.