Part of the Yanmar Parts Manuals.
Swap a leaking hose on the underside of a YB10-2 and you will want the exact adaptor and O-ring numbers in hand before the machine goes back on its tracks. This parts catalog for the Yanmar YB10-2 excavator (publication Y00K2301) is where those numbers live: 97 pages of exploded diagrams keyed to Yanmar part numbers.
It covers machines in both serial ranges, M/#~00780 and M/#00781~, and works section by section through the whole machine: lower frame, crawler belt, idler and crawler adjuster, driving wheel, blade, lower hydraulic piping, turning driving gear, main frame, driving controls, radiator and engine mount, electric parts, main valve, hydraulic oil tank, boom and arm, and the tool list.
Ordering pins, bushes and seals by eye off a worn machine is how you end up with a part that almost fits. Match the diagram, read the number, order once.
What's Inside This Yanmar YB10-2 (Excavator) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Lower Frame | - | Frame Assembly, Covers, Sliders, Bolts |
| Crawler Belt | - | Crawler Assembly, Shoe Plates, Track Pins, Washers |
| Idler & Crawler Adjuster | - | Front Idler Assembly, Shaft, Yoke, Springs, Bolts |
| Driving Wheel | - | Motor Assembly, Sprockets, Socket Bolts, Brake Valve |
| Blade | - | Assembly, Pins, Collars, Bolts, Grease Nipples |
| Lower Hydraulic Oil Piping | - | Hose Assemblies, Adaptors, Elbows, O-Rings, Guides |
| Turning Driving Gear | - | Turning Table Assembly, Bolts, Nuts, Washers, Pins, Bush |
| Main Frame | - | Stand, Covers, Brackets, Levers, Bushes, Springs, Bolts |
| Control Lever (Driving) | - | Brackets, Levers, Rods, Boots, Washers, Shafts, Springs |
| Radiator & Engine Mount | - | Engine Mount, Radiator, Brackets, Bolts, Washers |
| Electric Parts | - | Harness Assembly, Wires, Horn, Lamp, Battery, Cable, Clamp |
| Main Valve & Accessories | - | Adaptors, Connectors, Nipples, Elbows, O-Rings, Bolts |
| Hydraulic Oil Tank | - | Tank Assembly, Flange, Gasket, Plug, Strainer, Gauge |
| Boom & Arm | - | Boom Assembly, Bush, Collar, Cover, Pin, Washer, Spring |
| Tool | - | Driver, Oil Feeder, Remover, Wrench, Plier, Hammer, Grease Gun |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Collar Thickness | 1.6 | p. 11 |
| Nut | M12 | p. 17 |
| Shim Thickness | 1.6T | p. 25 |
| O-Ring Size | 1A P-16.0 | p. 27 |
| Nipple Type | PT1/8 | p. 35 |
Yanmar YB10-2 (Excavator) Common Problems This Manual Covers
Track tension wrong, rollers wearing fast
Tension that is too tight or too loose chews through idlers and rollers on a small excavator. The Idler & Crawler Adjuster section breaks down the front idler assembly, shaft, yoke and springs so you can order the worn adjuster components by part number.
Manual Section: Idler & Crawler AdjusterOne track slower than the other
Uneven tracking usually points to a tired travel motor or its brake valve. The Driving Wheel section lists the motor assembly, sprockets, socket bolts and brake valve, so you can identify exactly what to replace instead of guessing at the final drive.
Manual Section: Driving WheelStretched crawler belt and worn shoe plates
Hours on abrasive ground stretch the chain and round off shoe plates. The Crawler Belt section diagrams the crawler assembly with its shoe plates, track pins and washers for a pin-by-pin rebuild order.
Manual Section: Crawler BeltHydraulic hoses leaking under the frame
Hoses routed low on the undercarriage take the worst of the debris and weep first at the fittings. The Lower Hydraulic Oil Piping section identifies each hose assembly along with its adaptors, elbows, O-rings and guides so the whole run can be renewed in one order.
Manual Section: Lower Hydraulic Oil PipingSloppy boom and arm pins
Play at the boom foot and arm joints means pins, bushes and collars are due. The Boom & Arm section shows every bush, collar, pin, washer and spring in the assemblies so you can tighten the front end back up with the correct parts.
Manual Section: Boom & ArmElectrical faults, dead horn or lamp
Corroded terminals and chafed wiring cause flickering displays and dead circuits on machines this age. The Electric Parts section covers the harness assembly, wires, horn, lamp, battery, cable and clamps for chasing down and replacing the failed piece.
Manual Section: Electric PartsContaminated hydraulic oil, suspect strainer
Dirty oil kills pumps, and the tank strainer and gaskets are the cheap insurance. The Hydraulic Oil Tank section lists the tank assembly, flange, gasket, plug, strainer and gauge by part number.
Manual Section: Hydraulic Oil TankFrequently Asked Questions
Which machines and serial numbers does this catalog cover?
It covers the Yanmar YB10-2 excavator in both serial ranges, M/#~00780 and M/#00781~, under Yanmar publication number Y00K2301. Check the serial plate on your machine against those ranges before ordering parts from the diagrams.
Is this a repair manual with procedures and torque specs?
No, this is the parts catalog. It gives exploded diagrams and Yanmar part numbers for every assembly, from the Lower Frame through the Boom & Arm, so you can identify and order the right components. It does not contain step-by-step repair procedures.
Does it cover the undercarriage in detail?
Yes. The Crawler Belt section lists the crawler assembly, shoe plates and track pins; the Idler & Crawler Adjuster section covers the front idler, shaft, yoke and springs; and the Driving Wheel section covers the travel motor assembly, sprockets and brake valve.
What do I get after purchasing this Yanmar YB10-2 manual?
You get a 97-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print this Yanmar YB10-2 manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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