Description

Iseki 48E20, 48E20S, 48E40, SG17H-48C, 48E50 Parts Catalog

Ordering the wrong part because you guessed from a blurry online photo – that burns time and money. This Iseki 48E20, 48E20S, 48E40, SG17H-48C, 48E50 Parts Catalog is a factory document, not a reprint. 189 pages of exploded diagrams, part codes, and interchangeability notes. If you’ve ever stared at a box of random bolts wondering what goes where, this is the map.

Directions for Use: How This Catalog Is Organized

Page 2 lays out the model coverage table. You’ll see which engine (E374-G or E374-G01) matches each tractor variant. The catalog uses a single numbering system for all listed models: 48C, 48E20, 48E20S, 48E40, 48E40S, 48E50, plus the V-series. Each part gets a KEY number, a PART CODE, DESCRIPTION, QTY, and a set of columns marked with asterisks or letters that tell you if the part is standard, optional, or replaces an older one. I’ve seen guys grab the wrong suction filter because they ignored the model code – page 2 shows exactly which filter fits which machine.

Understanding the Part Number System

The OCR excerpt from page 3 explains the KEY column: it points to the location in the illustration. Part codes starting with ‘V’ or ‘W’ are standard market parts. Left and right (LH/RH) are defined relative to the machine’s forward direction. QTY is per one unit – unless it shows ‘M’ (meter length) or ‘l’ (liter) or ‘AR’ (adjust on installation). Pay attention to the symbol column: * = standard, T = optional, R = replacement. Miss that T and you’ll order a part that doesn’t fit the base model. Page 3 also shows the ITC (interchangeability) codes – old vs new compatibility. Don’t skip that.

7 Model Variants Covered

The catalog lists these base models: SG17H-48C, 48E20, 48E20S, 48E40, 48E40S, 48E50, 48E50T, plus the 48RE and V-series. Each gets its own section in the language table (Japanese, German, English, French, Italian). That means you get the original OEM part numbers for your specific tractor, not a generic cross-reference. For example, the 48E20 uses the E374-G01 engine – same as the 48E20S – but the mower deck parts differ. This catalog keeps you from mixing them up.

Interchangeability (ITC) Codes Explained

Page 3 spells it out. Three symbols: O↔NEW (new part replaces old bi‑directionally), →OLD→NEW (old can replace new but not vice‑versa), O↔OLD↔NEW (no interchange – don’t try). If a part shows an ITC code, read it before ordering. I’ve seen a mechanic bolt on a replacement steering sector that looked identical – until the splines didn’t match. The ITC column would have saved him the headache. This catalog includes those codes for every applicable part.

Color Codes and GRP Replacement Columns

On page 4, the catalog lists color codes for painted parts – referenced to a color list later in the book. The GRP column marks parts that can be replaced as a set. Example from the OCR: parts marked A can be replaced by parts marked B, D for circle marks, etc. If you’re restoring a 48E40 and need a matched set of decals or trim, the GRP column tells you which parts come as a set. That’s the kind of detail aftermarket catalogs leave out.

Real-world use: Say your 48E50’s hydraulic filter leaks. Find the key number, look up the part code (like 1614-538-205-00), check the model column for your tractor, verify the ITC symbol – done. No guesswork. This catalog works in the shop, not on a coffee table.

I trust OEM documentation over third-party reprints because factory specs don’t lie. This catalog came straight from Iseki’s parts department. The diagrams are scanned from the original print, not redrawn by some intern. If it’s a V48E20S, you get the V‑series parts list – not a generic SG17H sheet. For the guy working on a fleet of lawn tractors, this is the difference between one order and three returns.

Related manuals: Iseki SG15H Lawn & Garden Tractor Parts Catalogue covers earlier models; Iseki SG153H, 48E20, 48E20S, 48E40, SG153H-E20S Parts Catalog shares some drivetrain parts; Iseki TS3110 Parts Catalog – Factory OEM Parts Breakdown for compact tractors. For background on the broader agricultural equipment industry, see Automotive Industry Overview and Automotive Industry Overview.

Does this cover the 48E50T version?

Yes. The model list on page 1 includes 48E50T (French and Italian language sections). All parts for that variant appear with the correct model code columns.

What engine information is in the catalog? I need to order a head gasket.

The catalog lists the engine model (E374-G or E374-G01) in the language table on page 2. It does not include overhaul specs or torque values – that’s a service manual job. For a head gasket, you’ll find the part number in the engine section of this catalog. But to install it, grab the Iseki SG17H service repair manual. This parts catalog gives you the number; the service manual gives you the procedure.

Stop chasing ghosts through aftermarket parts books. Get the factory document that lists every screw, seal, and bearing for your Iseki tractor. Access the Factory Manual and keep it on your bench – right next to the torque wrench.