All 117 pages of this Yanmar B15 Crawler Excavator Parts Catalog zero in on one machine family: the B15C-AY, B15CR-AY, B15P-AY, B15PR CKD, and B15PR-AY. Inside, you get exploded-view assemblies for every system — engine mount, air cleaner, radiator, hydraulic oil pump and control valve, boom and arm cylinders, turning motor, swivel joint, and the full undercarriage from sprockets to track rollers. Wiring harness diagrams and hydraulic oil piping schematics are included, mapping fluid routing and electrical paths straight to OEM part numbers for the 3TNE68-NBAB engine and beyond. Your NS60 battery, 15A cartridge fuse, and 24V-6W work lamp bulb each appear with exact part numbers, so you order right the first time. Stop calling the dealer just to confirm a part number. Bookmarks take you straight to any assembly; search by keyword, pull the number, place the order.
What's Inside This Yanmar B15C-AY / B15PR-AY (Crawler Excavator) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| LABEL(CABIN) | 7-8 | Cabin Labels, Identification Plates, Warning Decals |
| Air Cleaner & Silencer | 11-12 | Exhaust System, Air Intake Hose, Silencer Components, Gaskets |
| Engine Mount | 15-16 | Engine Mounting Brackets, Rubber Cushions, Bolts, Nuts |
| Fuel Tank & Fuel Line | 19-20 | Fuel Tank Assembly, Fuel Filter, Fuel Cock, Fuel Gauge Unit |
| Electric PART(WIRING) | 23-24 | Wiring Harness, Electrical Components, Fuses, Relays, Grommets |
| Work Lamp | 29-30 | Assembly, Bulb, Wire, Cover Assembly |
| Roller & Adjust | 33-34 | Sprocket, Idler Assembly, Track Rollers, Adjustment Spring, Ball Bearings |
| Control EQUIPMENT(DRIVE) | 39-40 | Drive Pedals, Shafts, Boots, Springs, Nipples, Bolts |
| Control EQUIPMENT(BLADE) | 43-44 | Blade Control Grip, Lock Lever, Gas Spring, Control Cable, Cotter Pins |
| Frame & Turning Bearing | 49-50 | Frame Assembly, Turning Bearing, Covers, Rubber Seals, Bolts |
| Instrument Panel & Seat Mount | 57-58 | Instrument Panel, Seat Mount, Bonnet, Noise Absorber, Gas Spring, Catches |
| HYD.OIL Pump & Joint | 63-64 | Hydraulic Pump Assembly, Coupling, Bleed-Off Valve, Mounting Bolts |
| Boom Cylinder | 65-66 | Assembly, Piston, Rod, Seals, O-Rings |
| HYD.OIL PIPING(TANK-PUMP-VALVE) | 91-92 | Hydraulic Hoses, Fittings, Tank to Pump Lines, Pump to Valve Lines |
| Greasing | 109-110 | Points, L-Joints, Grease Fittings, Hoses, Nipples |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery replacement value | BATTERY NS60 | p. 20 |
| Fuse replacement value | FUSE (15A),CARTRIDGE | p. 24 |
| Fuse Rating | 15A | p. 24 |
| Bulb Voltage/Wattage | 24V- 6W | p. 24 |
| O-Ring Dimension (P-type) | P-38.0 | p. 88 |
| O-Ring Dimension (G-type) | 27X5.7 | p. 38 |
| Grommet Dimension | 16X20X4.5 | p. 22 |
| Cotter Pin Dimension | 3.2X20 | p. 54 |
Yanmar B15C-AY / B15PR-AY (Crawler Excavator) Common Problems This Manual Covers
Yanmar B15 excavator hydraulic hose part number unclear, need correct tank-to-pump line for replacement p. 91
Open the HYD.OIL PIPING(TANK-PUMP-VALVE) exploded view on page 91. Locate your specific hose in the diagram by tracing the routing from the hydraulic tank to the pump inlet, then cross-reference the item number against the parts list on page 92. Verify the hose fitting dimensions match the P-38.0 O-ring spec (page 88) before ordering to confirm compatibility across all B15 model variants.
Manual Section: HYD.OIL PIPING(TANK-PUMP-VALVE)Can't identify correct fuse part number, electrical panel shows blown 15A position p. 23
Turn to the Electric PART(WIRING) section on page 23. The parts list confirms the replacement fuse is a FUSE (15A), CARTRIDGE type (page 24). Cross-reference item positions in the wiring diagram to confirm which circuit the blown fuse protects before ordering. All B15 models use the same 15A cartridge rating for this position.
Manual Section: Electric PART(WIRING)Boom cylinder seal kit part number needed, O-rings leaking at rod end p. 65
Find the Boom Cylinder exploded view on page 65. Identify each seal and O-ring by item number in the diagram, then match to the parts list on page 66. The rod-end area uses a P-21.0 O-ring (page 46); confirm each individual item number before ordering, as seal kits may be listed as separate line items rather than a single kit assembly.
Manual Section: Boom CylinderCorrect battery part number unknown, need OEM spec before ordering replacement p. 19
Reference the Fuel Tank & Fuel Line section parts list on page 20, where the battery is catalogued as BATTERY NS60. Locate the battery item in the diagram and confirm the part number shown. Cross-check the Parts Number List to verify the current part number supersession status before placing the order.
Manual Section: Fuel Tank & Fuel LineTrack roller or idler part number needed, undercarriage components worn and unidentified p. 33
Go to the Roller & Adjust exploded view on page 33. The diagram breaks out the sprocket, idler assembly, track rollers, and adjustment spring as individual items. Find the worn component in the diagram, note its item number, and pull the part number from the page 34 parts list. The adjustment spring area uses a P-14.0 O-ring (page 32) — confirm this detail if ordering idler-related seals.
Manual Section: Roller & AdjustHydraulic pump coupling or mounting bolt part number required after pump removal p. 63
Locate the HYD.OIL Pump & Joint diagram on page 63. The exploded view covers the full pump assembly including coupling, bleed-off valve, and all mounting hardware as separate catalogued items. Match each component by item number to the parts list on page 64. Confirm the correct O-ring sizes using the P-34.0 spec (page 36) for any pump-joint interface seals before finalizing your order.
Manual Section: HYD.OIL Pump & JointDocument Quality
This is a scanned document with an OCR layer, allowing you to search and copy text throughout the file. The text is generally crisp and readable, and the diagrams are clear raster images with readable labels, though they will pixelate if zoomed in significantly. Page condition is mostly clean, with occasional minor scan artifacts, slight skewing, or faint lines present on some pages. Please note that there are numerous blank pages interspersed throughout the document, particularly after many of the illustrated parts breakdowns.
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