Printed by Kobelco as document YCUK93S001OM-00, this 140-page Kobelco SK300 III, SK300LC III operator manual PDF is the factory book for both versions of this hydraulic excavator. Hydraulic and electric circuit diagrams sit in the reference chapter with working ranges, attachment combinations and component weights, so your pilot circuit and harness layout are on paper when a fault shows up. Maintenance takes the largest share of the book: pre-work checks, the service interval schedule and a lubrication and filter chart, followed by a troubleshooting table, transport preparation and hydraulic breaker precautions. Blow out the air cleaner element at under 100 psi (7 kg/cm²), and torque the hydraulic tank return filter cover to 80 ± 11 ft·lbs. Filter day should not stall on one missing number. Chapter bookmarks and a live text layer find it in seconds, and your excavator is swinging a full bucket again before lunch.
What's Inside This Operator Manual
| System | Pages | Key Topics |
|---|
| Safety Operation | 4-31 | Safety Procedures (Recognize Safety Information, Understand Signal Words, Follow Safety Instructions) |
| Operating Equipment | 32-49 | Location of Components, Arrangement of Operating Controls, Operating Controls, Cab, I.T.C.S |
| Operation | 50-65 | Starting and Stopping the Engine, Operating Procedure, Method of Selecting the Mode Change Over Switch, Operating Methods for Improving Efficiency |
| Maintenance | 66-105 | Introduction, Pre-Work Check, Regular Maintenance (Items and Intervals, Lubrication and Filter Chart), Maintenance Under Special Conditions |
| Transportation | 106-109 | Preparing for Transportation |
| Reference Documents | 110-121 | Overall Specifications, Specifications and Performance, Types of Attachments and Combinations, Working Ranges of Attachments, Weight of Components, Hydraulic Circuit Diagram |
| Heater | 122-125 | Controls and Operation |
| Troubleshooting | 126-131 | Troubleshooting Table |
| Breaker & Optional Attachments | 132-137 | Hydraulic Breaker, Hydraulic Breaker Precautions |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Air cleaner element | 2446R353S3 (Outer), 2446R273S1 (Inner) | p. 71 |
| Manifold block filter tightening torque | 7~8 kgf-m (50.6~57.8 ft-lbs) | p. 85 |
| Hydraulic tank cover mounting (Return filter) torque | 11 ± 1.5 kgf·m (80 ± 11 ft·lbs) | p. 101 |
| Compressed air pressure for cleaning air cleaner element | less than 7 kg-cm2 (100 psi) | p. 88 |
| Travel motor cover mounting torque | 8.5 ± 0.5 kgf·m (61 ± 4 ft·lbs) | p. 101 |
| Travel motor mounting torque | 95 ± 9.5 kgf·m (686 ± 69 ft·lbs) | p. 101 |
| Battery mounting torque | 1.0 ± 0.2 kgf·m (7 ± 2 ft·lbs) | p. 101 |
| Pilot circuit select valve screw key size | 3mm | p. 133 |
| Pilot circuit select valve wrench size | 17mm | p. 133 |
| Hydraulic Tank Capacity | 282L | p. 73 |
| Engine Oil Pan Capacity | 34L | p. 73 |
| Swing Gear Sump Grease Capacity | 14kg | p. 73 |
