Part of the Yanmar Parts Manuals.
A seized track roller on a Scoppy B03 looks like a cheap fix until you order the part from memory and a lookalike arrives that almost fits. Guessed part numbers waste weeks on a machine this old, which is exactly what this book prevents: it is the Yanmar parts catalog, publication 000Y00K2631-2, for the B03 super-mini crawler backhoe family, covering the B03, Scoppy B03, B03 G, B03 P and B03Y built in 1990 and 1991 with the GA120R-DZB engine.
Across 73 pages you get illustrated exploded diagrams for every assembly, from the rubber crawler undercarriage and hydraulic cylinders to the fuel line, battery and control levers, each component keyed to its Yanmar part number and quantity. Serial number ranges are printed so you can match your exact machine before ordering.
It is a one-time PDF download, yours to keep for the life of the machine.
What's Inside This Yanmar B03 / Scoppy B03 (Crawler Backhoe) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Preface | 1 | Parts Catalog History, Model Names, Painted Colors, Catalog Scope |
| Specifications | 2 | Engine Type, Dimensions, Capacities, Performance Data, Machine Mass |
| Picturesque Index (Main Parts) | 3-4 | Labeling, Engine Components, Hydraulic Components, Undercarriage, Control Systems |
| Wiring Diagram | 5 | Ignition System, Charging System, Starting System, Hour Meter |
| Label | 8-12 | Machine Serial Number Location, Export Labels (France, Germany, English), Caution Labels |
| Engine Mount & Engine Accessory | 14 | Engine Mounting |
| Fuel Tank & Fuel Line | 18 | |
| Battery | 20 | Assembly |
| Accelerator & Electric Part | 22 | |
| Idler, Track Roller & Crawler | 24 | |
| Control Equip. (Operation) | 26 | |
| Hyd. Oil Pump & Pump Mount | 38 | Hydraulic Pump Assembly, Pump Mounts |
| Boom Cylinder | 40 | Cylinder Assembly |
| Driving Motor | 50 | Motor |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic Suction Filter Part Number | 172732-73700 | p. 51 |
| Hydraulic Suction Filter Quantity | 1 | p. 51 |
| Fuel Filter Part Number | 124190-55500 | p. 17 |
| Fuel Filter Quantity | 1 | p. 17 |
| Grease Joint Part Number | 172141-77800 | p. 65 |
| Grease Joint Quantity | 2 | p. 65 |
| Track Roller Assembly Part Number | 772156-37300 | p. 23 |
| Idler Part Number | 172155-37100 | p. 23 |
| Idler Quantity | 2 | p. 23 |
| Sprocket Part Number | 172155-29100 | p. 23 |
Yanmar B03 / Scoppy B03 (Crawler Backhoe) Common Problems This Manual Covers
Weak hydraulics from a starved pump
When the boom slows down and the pump starts whining, a clogged suction filter or return strainer in the hydraulic tank is the usual cause on these machines. The Hyd. Oil Tank section shows the tank, suction filter, strainer and oil gauge as separate orderable parts.
Manual Section: Hyd. Oil Tank p. 52Rubber crawler thrown or worn out
Thirty-year-old rubber tracks crack, stretch and derail, and worn rollers and idlers accelerate the damage. The Idler, Track Roller & Crawler section gives part numbers for the sprocket, idler assemblies, track rollers and the rubber crawler itself.
Manual Section: Idler, Track Roller & Crawler p. 24Engine dies from fuel starvation
A backhoe that starts, runs a few minutes and stalls usually has a plugged fuel filter or perished fuel hoses. The Fuel Tank & Fuel Line section covers the tank assembly, gauge, hoses and filter so you can replace the whole delivery path.
Manual Section: Fuel Tank & Fuel Line p. 18No start or dead electrics
Corroded connections, a failed starter switch or a tired regulator will leave a B03 silent. The Accelerator & Electric Part section identifies the starter switch, hour meter, horn and regulator with their part numbers.
Manual Section: Accelerator & Electric Part p. 22Boom cylinder weeping oil
Oil streaks down the boom cylinder mean the rod seals are done. The Boom Cylinder section breaks the cylinder into piston, head, seals and bushings so you can order a reseal instead of a whole assembly.
Manual Section: Boom Cylinder p. 40Sloppy boom and arm pins
Clunking and visible play at the boom base or arm joint comes from worn pins and bushings. The Boom & Arm section maps every pin and bushing in the digging gear so you replace the right ones the first time.
Manual Section: Boom & Arm p. 68Broken or missing grease nipples
Snapped-off nipples and crushed remote grease hoses quietly starve pins until they seize. The Greasing section lists the grease nipples, hoses and remote greasing points as individual replaceable parts.
Manual Section: Greasing p. 66Frequently Asked Questions
Which machines does this parts catalog cover?
It covers the Yanmar B03 super-mini crawler backhoe family: B03, Scoppy B03, B03 G, B03 P and B03Y, 1990 to 1991, with the GA120R-DZB engine. The Preface lists the model names and catalog scope, and the covered serial number ranges (such as 00501-01477) let you confirm your machine. p. 1
Is this a repair manual with torque specs and procedures?
No, it is the factory parts catalog. You get exploded diagrams, Yanmar part numbers and quantities for every assembly, plus a specifications page and wiring diagram. It is the reference you need to identify and order correct parts, not step-by-step repair instructions.
Does it list part numbers for the hydraulic filters?
Yes. The Hyd. Oil Tank section covers the suction filter (172732-73700) and return strainer (172156-73700) along with the tank, oil gauge and related hardware, so you can cross-reference before buying replacements. p. 52
Does it include a wiring diagram?
Yes. The Wiring Diagram section shows the electrical connections for the ignition, charging and starting systems plus the hour meter, which helps when chasing a no-start or dead gauge on these machines. p. 5
What format is this B03 manual in?
Instant PDF download. You get the full 73-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print specific sections of this B03 Parts Catalog?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Can I find wiring schematics in this B03 manual?
Yes, an electrical wiring diagram is included to help trace the main circuits.
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