Power train, axles, differentials and final drives get the heaviest treatment in this 849-page Komatsu WA250-5H, WA250PT-5H shop manual PDF (OEM ID VEBM230102), and the wheel loader coverage widens from there into engine, electrical and hydraulic work. Hydraulic and electrical circuit diagrams close out the book, putting pump-to-loader-valve routing beside the harness layout you trace when a circuit drops out. Testing and Adjustment fills roughly two fifths of the pages, with engine and chassis standard value tables, error codes and troubleshooting charts, while Disassembly and Assembly carries you through fuel injection pump, cylinder head and complete engine removal. Confirm twin 24 V 110 Ah batteries and a 24 V 60 A alternator before condemning the starter, and torque a No. 10 O-ring boss plug to 11.27 ± 1.47 Nm. Guessing on a final drive buys you a second teardown. Your bookmarked, text-searchable copy prints clean, so the pages can go to the bench and take the grease.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| General | 27-36 | General Assembly Drawings, Specifications, Weight Table |
| Structure, Function and Maintenance Standard | 37-280 | Power Train, Axle, Differential, Final Drive |
| Testing and Adjustment | 281-616 | Standard Value Table for Engine, Standard Value Table for Chassis, Tools for Testing, Adjusting, And Troubleshooting |
| Disassembly and Assembly | 617-830 | Removal, Installation of Fuel Injection Pump Assembly, Installation of Cylinder Head Assembly, Installation of Engine Assembly |
| Others | 831-849 | Hydraulic Circuit Diagram, Electrical Circuit Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| O-ring boss plugs torque (Nominal No. 08) | 7.35 ± 1.47 Nm | p. 17 |
| O-ring boss plugs torque (Nominal No. 10) | 11.27 ± 1.47 Nm | p. 17 |
| Starting motor | 24 V 4.5 kW | p. 30 |
| Alternator | 24 V 60 A | p. 30 |
| Battery | 24 V 110 Ah x 2 pcs. | p. 30 |
| Engine mounting bolt torque | 610-765 Nm {62.5-78 kgm} | p. 651 |
| Radiator pressure valve opening pressure | 68.6 kPa | p. 40 |
| Radiator vacuum valve opening pressure | 0-4.9 kPa | p. 40 |
| Set pressure of high-pressure relief valve | 44.1 MPa {450 kg/cm2} | p. 46 |
| Set pressure of high-pressure cut-off valve | 41.2 MPa {420 kg/cm2} | p. 46 |
| Hydraulic tank bypass valve setting pressure | 0.2 MPa {2.04 kg/cm2} | p. 150 |
| Breather air intake valve set pressure | 3.0 ± 0.3 kPa {0.03 ± 0.003 kg/cm2} | p. 151 |
