Covering both the K008-3 and U10-3 in one 392-page factory document, this Kubota workshop manual PDF (OEM #97899-60730) serves as the full service reference for either mini excavator: machine body, engine, hydraulic system, and electrical, from first bolt to final torque. The hydraulic schematics map the full circuit layout, the wiring diagrams trace the electrical system, and step-by-step procedures walk through undercarriage, boom, and bucket rebuilds alongside troubleshooting charts and a dual-machine torque table. Set the sprocket fixing bolt to 48.0~56.0 N·m, the track roller bolt to 78.0~90.0 N·m, and swap the return filter every 500 hours of normal excavator work. No more hunting specs across three forums at midnight. Bookmarked by section and searchable by keyword, it opens on any device and lands you on the right page in seconds.
What's Inside This Kubota K008-3, U10-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| I. General | 5-33 | Body, Engine, O-ring, Oil seal, Circlip, Roll Pin, Hose, Piping |
| II. Machine body(Mechanism section) | 34-47 | Machine body, Component interchangeability, Machine structure, Bucket, Control linkage, Engine mount, Under carriage |
| II. Machine body(Service section) | 48-99 | Machine body, Front attachment, Upper Structure, Under carriage, Parts weight, Water and Oil Quantity |
| III. Engine(Mechanism section) | 100-129 | Engine Body, Lubricating System, Cooling System, Fuel System, Electrical System |
| III. Engine(Service section) | 130-199 | Engine mount, Engine body, Lubricating system, Cooling system, Fuel system, Electrical system, Cylinder Head, Valves |
| IV. Hydraulic system(Mechanism section) | 200-257 | Main pump, Pilot pump, Control valve, Pilot valve, Swing motor, Rotary joint, Travel motor, Hydraulic circuit |
| IV. Hydraulic system(Service section) | 258-359 | Pump System, Relief Valves, Swivel system, Traveling system, Cylinder system, Pilot valve, Swivel Joint, Hydraulic Hose |
| V. Electrical system(Service section) | 360-392 | Wireharness, Electric Wiring, Electric System, Starter, Panel, Horn, Fuel pump, Working light |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| K008-3, U10-3 | ||
| Sprocket fixing bolt tightening torque | 48.0 ~ 56.0 N·m (4.9 ~ 5.7 kgf·m) | p. 331 |
| K008-3 | ||
| Track roller bolt tightening torque | 78.0~90.0 N·m (7.9~9.2 kgf·m) | p. 94 |
| U10-3 | ||
| G 1/4 adaptors tightening torque | 24.5~29.4 N·m (2.5 ~ 3.0 kgf·m) | p. 294 |
| G 3/8 adaptors tightening torque | 37.2~42.1 N·m (3.8 ~ 4.3 kgf·m) | p. 294 |
| All Models | ||
| Return Filter replacement interval (Normal excavator work) | every 500 Hrs. | p. 31 |
| Return Filter replacement interval (20%, 40%, 60% breaker work) | every 300 Hrs. | p. 31 |
| Fuel filter cleaning interval | Every 200 hrs | p. 31 |
| Engine oil filter cartridge replacement interval (Initial) | 50 Hrs (Intial) | p. 145 |
| Engine oil filter cartridge replacement interval (101 mm oil pan depth) | 150 Hrs | p. 145 |
| Air filter element cleaning interval | Every 100 hrs | p. 31 |
| Air filter element changing interval | every 1000 hrs | p. 31 |
| Battery type | 44B19R | p. 104 |
Kubota K008-3, U10-3 Common Problems This Manual Covers
Kubota K008-3 hydraulic controls feel excessively fast and jumpy, difficult to control at low speed p. 314
Check the hydraulic fluid level first: full system capacity is 18 L (page 63), and aerated or contaminated oil produces erratic speed response. Follow the pilot circuit on the hydraulic schematic, then work through the Pilot Valve Troubleshooting procedures to verify secondary pressure output. If pressure reads too high, the pilot valve relief needs adjustment or replacement.
Manual Section: Pilot Valve TroubleshootingEngine cranks slowly or won't fire after sitting overnight in cold weather p. 372
Measure battery voltage first; good condition sits above 10.5 V (page 372). Inspect the fuse panel next: the timer relay fuse is 15A (page 380) and the fuel pump fuse is 5A (page 384). If both fuses are intact and the battery holds voltage under load, follow the Electrical System Troubleshooting (Engine) procedures for starter-rotating-but-no-start and cold-weather hard-start conditions.
Manual Section: Electrical System Troubleshooting (Engine)Machine tipped on its side during operation, engine runs rough or won't restart p. 143
Drain the engine oil and inspect it before any restart attempt; crankcase capacity is 2.2 L (page 63). Look for frothy, milky, or fuel-contaminated oil left by the tip-over. Confirm oil pressure reads 196~441 kPa at rated speed (page 143). With no automatic low-oil shutdown on these machines, internal wear may already be present even if the engine fires back up.
Manual Section: Engine Troubleshooting (General)Hydraulic oil leaking from fittings or hoses, puddle visible under machine after operation p. 303
Trace the leak to its source before wiping anything down. Torque 1/8 in. union nuts to 7.8~11.8 N·m (page 16) and G1/4 washer elbows to 25~30 N·m (page 19). Any hose that shows cracking or swelling needs replacement; the scheduled interval is every 2 years or 4000 hours (page 32). Renew all O-rings at every disassembly (page 303).
Manual Section: IV. Hydraulic system(Service section)Return filter overdue for service, all hydraulic functions running sluggish and slow p. 31
Swap the return filter every 500 hours for standard digging, or every 100 hours when a breaker runs more than 80% of the time (page 31). Refill the hydraulic system to 18 L after service (page 63). If the sluggishness persists after fresh oil and a new filter, work through the Hydraulic System Troubleshooting procedures in the hydraulic service section.
Manual Section: IV. Hydraulic system(Service section)Temperature gauge climbing high during normal work, oil pressure warning lamp illuminating p. 143
Inspect the engine oil level first; crankcase capacity is 2.2 L (page 63), and even a small shortfall drops pressure fast. Normal oil pressure at rated speed runs 196~441 kPa (page 143). Clear debris from the radiator fins and confirm the coolant level, then work through the Engine Troubleshooting (General) section for overheating and deficient output. Remember these machines carry no automatic low-oil shutdown.
Manual Section: Engine Troubleshooting (General)Frequently Asked Questions
What are the torque specs for Kubota K008-3/U10-3 track motor or undercarriage bolts?
On the wheel motor adaptor, the sprocket fixing bolts (Code No: 01311-11025) torque to 48.0 ~ 56.0 N·m (4.9 ~ 5.7 kgf·m), and the motor-frame fixing bolts torque to 48.1~55.9 N·m (4.9 ~ 5.7 kgf·m).
How do I reset the Kubota K008-3/U10-3 hydraulic system after maintenance?
After maintenance, bleed the U10-3 hydraulic operating unit like this: set the attachment operating lock lever to "Lock", run the engine at full speed for 1-2 minutes, then move the lever to "Unlock" and work the attachment with the operating lever. Repeat two or three times if needed.
What are the replacement specifications for hydraulic oil filter?
Under normal excavator work, change the return filter every 500 hours and the suction filter every 1000 hours. Running a hydraulic breaker shortens the return filter interval from 300 hours (20-60% breaker work) to 100 hours (more than 80%), while the suction filter stays at 1000 hours.
What are the replacement specifications for fuel filter?
Clean the fuel filter every 200 hours and change the fuel filter element every 400 hours. At the first 50 hours of operation, change the oil filter cartridge as well.
How quickly can I access this Kubota K008-3, U10-3 manual after buying?
Download is instant. The full 392-page searchable Workshop Manual is yours immediately after payment, ready to open on a laptop, tablet, or phone right in the shop.
Are there any print restrictions on this Kubota K008-3, U10-3 manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this Kubota K008-3, U10-3 manual include hydraulic schematics?
Full hydraulic system diagrams are included, covering circuits, valve locations, and hydraulic component specs for the Kubota K008-3, U10-3.
Document Quality
This document is a scanned PDF, providing an OCR layer that allows you to search and copy the full text content. The text is generally crisp and readable throughout. Diagrams and illustrations are raster images, which are clear at normal viewing but may show some pixelation if zoomed in significantly; labels within them are readable. Pages are mostly clean, though some minor scan artifacts are present, and some pages include black bars on the side, likely from the scanning process. Notably, pages 4, 35, and 49 are largely blank, and page 131 explicitly states that several subsequent pages are missing from the manual.
Reviews
There are no reviews yet.