All 73 pages of this B03 Parts Catalog cover the 1990-1991 B03. You get figure-indexed exploded views for every assembly from boom and arm cylinders to the driving motor, rubber crawler, and hydraulic oil tank, plus a wiring diagram covering ignition, charging, and starting circuit connections. Part numbers run the full machine: engine mounts, fuel lines, control levers, grease nipples, and the hydraulic circuit from pump mount to control valve. Your hydraulic suction filter is #172732-73700, the return strainer is #172156-73700, and the fuel filter is #124190-55500. Factory numbers, not forum guesses. Bookmarked and searchable; pull any figure up on your tablet, read the part number off the exploded view, and order exactly what your machine needs.
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 | Electrical Connections, 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, Vibration Dampeners, Hoses, Clamps |
| Fuel Tank & Fuel Line | 18 | Fuel Tank Assembly, Fuel Gauge, Fuel Hoses, Fuel Filter |
| Battery | 20 | Assembly, Cables, Clamp, Nuts |
| Accelerator & Electric Part | 22 | Throttle Lever, Starter Switch, Hour Meter, Horn, Regulator |
| Idler, Track Roller & Crawler | 24 | Sprocket, Idler Assembly, Track Rollers, Rubber Crawler |
| Control Equip. (Operation) | 26 | Control Levers, Grips, Bushings, Spring Washers, Bolts |
| Hyd. Oil Pump & Pump Mount | 38 | Hydraulic Pump Assembly, Pump Mounts, Couplings, Keys |
| Boom Cylinder | 40 | Cylinder Assembly, Piston, Head, Seals, Bushings |
| 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 |
| Track Roller Assembly Quantity | 2 | p. 23 |
| Idler Part Number | 172155-37100 | p. 23 |
| Idler Quantity | 2 | p. 23 |
| Sprocket Part Number | 172155-29100 | p. 23 |
| Sprocket Quantity | 2 | p. 23 |
Yanmar B03 / Scoppy B03 (Crawler Backhoe) Common Problems This Manual Covers
Yanmar B03 hydraulic suction filter and return strainer look identical on the machine, need correct part numbers for each p. 52
Find the hydraulic tank exploded view on page 52. The two filters serve different circuits: the suction filter is part #172732-73700 and the return strainer is part #172156-73700. Both are single-quantity items per machine. Order by part number, not by appearance, since the two assemblies interchange in the parts list but not on the machine.
Manual Section: Hyd. Oil TankTrack roller assembly part number needed, undercarriage exploded view shows several roller-style components p. 24
Open the chassis parts diagram on page 24. The track roller assembly is part #772156-37300, qty 2 per machine. The idler assembly (part #772155-37100, qty 2) and sprocket (part #172155-29100, qty 2) appear in the same exploded view. Identify which component you are replacing before ordering, as all three are distinct line items with separate part numbers.
Manual Section: Idler, Track Roller & CrawlerGrease nipple stripped or missing on control linkage pins, need correct thread size and part number p. 66
Check the greasing diagram on page 66 for nipple positions across the machine. The PT1/8 thread nipple is part #24761-020000 and the MT6X1 thread version is part #24761-060000, both listed on page 31. Gauge the hole thread before ordering: these two nipples are not interchangeable. Remote grease joints (part #172141-77800) are a separate line item listed on page 65.
Manual Section: GreasingFuel filter part number needed, tank assembly diagram shows filter inline with multiple fuel system components p. 18
Pull the fuel tank and fuel line diagram on page 18. Locate the filter callout in the exploded view and confirm part #124190-55500, qty 1 per machine. The fuel gauge, hoses, and clamps in the same diagram carry different item numbers, so verify the specific callout number on the exploded view before placing the order to avoid pulling a hose or fitting by mistake.
Manual Section: Fuel Tank & Fuel LineBoom cylinder leaking, need to identify which seal and bushing parts to order from the exploded view p. 40
Open the boom cylinder diagram on page 40. Each sub-assembly, piston, head, and rod, carries its own line items for seals and bushings. Match the item callout numbers in the exploded view to the parts list column to identify each seal by position. Order by individual part number rather than requesting a generic kit, since the catalog lists each component separately.
Manual Section: Boom CylinderBattery cables corroded, need part numbers for terminals, clamps, and cables from the parts catalog p. 20
Open the battery assembly diagram on page 20 to locate part numbers for the cable, clamp, and mounting hardware. Cross-reference with the wiring diagram on page 5 to confirm positive and negative cable routing before ordering. Positive and negative cables carry separate part numbers, so check all callouts in the exploded view rather than ordering a single generic cable.
Manual Section: BatteryFrequently Asked Questions
What are the replacement specifications for hydraulic filters?
The manual identifies the hydraulic suction filter with part number 172732-73700 (item 6). However, specific replacement intervals or detailed procedures for this filter are not provided in this parts catalog.
How do you fix yanmar B03 hydraulic suction filter and return strainer look identical on the machine, need correct part numbers for each?
Find the hydraulic tank exploded view on page 52. The two filters serve different circuits: the suction filter is part #172732-73700 and the return strainer is part #172156-73700. Both are single-quantity items per machine. Order by part number, not by appearance, since the assemblies interchange in the parts list but not on the machine.
How do you fix track roller assembly part number needed, undercarriage exploded view shows several roller-style components?
Open the chassis parts diagram on page 24. The track roller assembly is part #772156-37300, qty 2 per machine. The idler assembly (part #772155-37100, qty 2) and sprocket (part #172155-29100, qty 2) appear in the same exploded view. Identify which component you are replacing before ordering, as all three are distinct line items with separate part numbers.
How do you fix grease nipple stripped or missing on control linkage pins, need correct thread size and part number?
Check the greasing diagram on page 66 for nipple positions across the machine. The PT1/8 thread nipple is part #24761-020000 and the MT6X1 thread version is part #24761-060000, both listed on page 31. Gauge the hole thread before ordering: these two nipples are not interchangeable. Remote grease joints (part #172141-77800) are a separate line item listed on page 65.
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.
Document Quality
This document is a mixed PDF, featuring both scanned images and native digital text. The preface, specifications, and all parts lists are native digital text, meaning you can search and copy text from these sections, and the text is crisp and clear. However, all diagrams and their associated labels are raster images from a scan, so while generally readable, they are not perfectly sharp at high zoom levels, and text within these images is not searchable. The pages are clean with no notable scan artifacts, stains, or skewed content, and there are no blank or filler pages.
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