Part of the Kubota Operator Manuals.
This is the operator manual for the Kubota U25 and U25-3S compact excavator, powered by the Kubota D1105-E3 diesel engine. Across 85 pages it walks owners and operators through safe operation, daily and interval maintenance, machine controls, and the reference data needed to keep the machine working.
You get the full sequence for running the excavator: starting the engine, reading the warning lamps and LCD display, using the Two Pattern Selection System, and operating the boom, arm, bucket, and dozer. The maintenance sections cover engine oil and filter changes, hydraulic filter service, track adjustment, and fuse locations.
The manual also includes transport and lifting procedures, cold-weather and long-storage guidance, a troubleshooting chart, and specification tables for capacities, main dimensions, and lifting performance. It is a downloadable PDF you can read on any device or print for the shop.
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| List of Abbreviations | 2 | Api, Astm, Cece, Din, En, Front |
| General Symbols | 3 | Safety Alert Symbol, Alarm Lamps, Operation Directions, Read Operator's Manual |
| Foreword and Safety First | 4 | Excavator Introduction, Safety Alert Symbol, Danger, Warning, Caution Definitions |
| Safe Operation | 9-19 | Before Operation, Starting of the Excavator, After Operation, Safe Loading and Transport, Danger/Warning/Caution Labels |
| Machine Overview (Dealer Service, Technical Data, Parts, Controls) | 21-25 | Serial Numbers, Engine Specifications, Machine Components, Instrument Panel, Control Levers |
| Pre-Operation Checks | 26-29 | Daily Checks, Seat Adjustment, Opening/Closing Parts, Safety Devices, ROPS/OPG |
| Engine Operation | 30-35 | Starting the Engine, Display Selector Switch, Warning Lamps, Cold Weather Starting, Stopping the Engine, Auxiliary Battery |
| Excavator Operation | 36-45 | Running-In, Adjusting Seat, Lock Lever, Two Pattern Selection System, Boom/Arm/Bucket/Dozer Operation, Driving, Turns, Parking |
| Transport and Lifting | 46-49 | Loading on Truck, Securing, Lifting Procedure, Tackle, Max Load |
| Maintenance | 50-56 | Maintenance Schedule, Lubrication Chart, Oil Level Checks, Grease Points, Filter Locations |
| Regular Checks and Maintenance Work | 57-69 | Engine Oil Change, Fuel Filter, Air Filter, Hydraulic Filter, Track Tension Adjustment, Fuses |
| Other Adjustments and Replacements | 70-73 | Bucket Tooth Replacement, Blade Adjustment, Slew Ring Lubrication, Belt Inspection |
| Troubleshooting | 74-76 | Engine, Hydraulic System, Drive System, Kubota I.C.S. Messages, Service Hour Meter |
| Environmental Operations and Storage | 77-79 | Cold Weather Preparation, Post-Operation Procedures, Long Storage, Periodic Component Replacement |
| Reference Data (Oils, Dimensions, Capacity, Specs) | 80-85 | Recommended Oils, Main Dimensions, Lifting Capacity Tables, Engine Output, Hydraulic Flow, Operating Weight |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Hydraulic hose replacement interval | Every 2 years or 4000 hours | p. 79 |
| Fuel hose replacement interval | Every 2 years or 4000 hours | p. 79 |
| Air filter element (Outer element) cleaning interval | every 200 hrs | p. 50 |
| Air filter element (Outer element) replacement interval | every 1000 hrs | p. 50 |
| Engine oil filter replacement interval | every 250 hrs | p. 50 |
| Coolant change interval | every 2 years | p. 50 |
| Radiator capacity | 2.4 L | p. 69 |
| Hydraulic oil change interval | every 1000 hrs | p. 50 |
| Hydraulic tank capacity | 22.5 L | p. 66 |
| Operating weight (including operator's) | 2550 kg | p. 22 |
| U25 | ||
| Engine power SAE gross | 15.5 kW | p. 22 |
| U25-3S | ||
| Engine Output (SAEJ 1995 gross) | 20.9 HP | p. 85 |
