Description

Yanmar B37-2B 1998 Parts Catalog – What the Factory Uses

You pull a part that looks right off the shelf, and it doesn’t fit. Or it fits but it’s the wrong material and you get a seal failure three months later. That’s the cost of buying aftermarket parts by eye instead of using the factory numbers. This 266-page Yanmar B37-2B Parts Catalog from 1998 gives you the part numbers, paint codes, and exploded views direct from the people who built the machine. I’ve been wrenching on these crawler backhoes for enough years to know that you order a Yanmar lift cylinder seal kit from this book or you waste a day swapping the wrong one.

The book is laid out with a preface explaining which market versions it covers: Japan, Australia, and export excluding Europe and USA. The model breakdown includes cabin and canopy specs, front and side lever variations, and the engine – a 3TNE88-B1. Every variant matters because the hydraulic plumbing changes. You order a hose for a canopy spec and your cabin spec machine has a different route – I’ve seen that eat a morning.

PICTURESQUE INDEX: Finding the Right Part

The catalog uses what Yanmar calls a “PICTURESQUE INDEX” – exploded drawings grouped by section. There are sections for main parts, hydraulic section, and then figure numbers 01 through 119 split across multiple bookmarks. Each figure shows components with reference numbers. You find the number, cross it to the part list, and you get the genuine Yanmar part number. No fuzzy aftermarket drawings that skip fasteners. This index is broken into twelve groups of 12 figures each – that coverage means you can locate anything from the final drive to the bucket linkage without flipping through 200 pages blind.

Paint Codes and Color Matches

Page references show the vehicle painted color section with Yanmar New Permanent Yellow (5.2Y8.5/11) and Yanmar Citrus Green (5.84GY8.42/6.99). If you’re restoring a machine or doing body work, you need these Munsell numbers. The catalog lists the color code for each part: deep green on the frame, peacock green on the canopy, greyish green on the undercarriage. Ordering paint without this leads to a mismatch you’ll see from across the lot.

Wiring Diagrams: One Touch Decel System

Two wiring diagram sections are included: the main harness and the One Touch Decel system. If your backhoe’s decelerator isn’t kicking down when you move the travel levers, you trace it through these factory diagrams. Aftermarket diagrams often consolidate circuits and drop pin numbers. This one shows the actual Yammer routing and connector locations. I’ve fixed three decel issues on B37 models using this diagram – every time the problem was a broken wire at the cab hinge, not the control unit.

Specifications and Model Variants

The specs table covers iron and rubber crawler versions, canopy vs cabin, with dimensions in millimeters. Transport length 4810 mm, standard bucket capacity 0.11 m³, max digging depth 3150 mm (3350 with blade). Engine bore x stroke is 88 x 90 mm. The machine mass ranges from 2990 kg to 3210 kg depending on configuration. These numbers matter when you’re ordering undercarriage parts or checking ground pressure. You get the same data the dealer parts counter uses.

Why OEM Source Matters

This is a factory Yanmar parts catalog, not a reprint or a third-party compilation. The preface states: “this parts catalog is not a technical data manual setting forth as servicing procedures” – so don’t buy it for torque specs or repair steps. But if you need the correct part number for a blade cylinder seal kit or a track roller, this is the only book that guarantees the number matches Yanmar’s inventory. Aftermarket catalogs re-use generic illustrations and often mislabel revisions. This one includes the revision history: first edition 1997/7, first revised 1998/11. You get the update, not an obsolete list.

Related factory manuals you might need:

• Ammann Yanmar B12 B17 Parts Catalog
• Yanmar YB271, B27 1994 Parts Catalog – OEM Factory Specs
• Yanmar YB301 YB351 1991 Parts Catalog – 248 Pages OEM

For broader context on construction equipment maintenance standards, see the Automotive Industry Overview and also Automotive Industry Overview.

Does this catalog cover the engine parts for the 3TNE88-B1?

Yes. The engine section is listed under section II with model 3TNE88-B1, production from 1997/5 onward. All engine part numbers are included in the picturesque index figures.

Can I use this for the Yanmar B37-2B with rubber crawler?

Yes. The specifications table separates iron and rubber crawler; the parts illustrations call out track components for both. Make sure you check your machine’s serial number for correct figure group.

What is included in the “WIRING DIAGRAM(ONE TOUCH DECEL)” section?

It shows the complete electrical schematic for the one‐touch deceleration system, including the decel solenoid, travel lever switches, and control unit. Trace voltage drops and opens with factory color codes and connector pinouts.

Are the paint color codes in the catalog still current?

Yanmar updates paint formulas over time, but the Munsell numbers in this 1998 catalog (e.g., Yanmar New Permanent Yellow 5.2Y8.5/11) are the reference that paint suppliers use to mix. For later revision changes, check with Yanmar dealer.

If you’re ordering parts for a B37-2B and you don’t want to chase wrong numbers, this 1998 factory parts catalog is what you need. Access the Factory Manual from AutoRepairManuals and keep it in the shop tablet – you’ll save more than the price on the first correct part order.