This is the full workshop manual for the Caterpillar 259B3 compact track loader, model years 2011 to 2015. It covers every system on the machine: the C3.4 basic engine, fuel, cooling, air inlet and exhaust, lubrication, the complete hydraulic system, power train, final drives, undercarriage, electrical and starting, operator station, frame, implements and work tools. You get the actual factory test values, not guesswork - fan drive relief at 4725 kPa (685 psi), the 5 micron hydraulic filter spec, filter bypass valve opening at 345 kPa (50 psi), cooler bypass check valve at 172 kPa (25 psi). There is a dedicated Torque Specifications section, plus Service Equipment and Supplies so you know which tools the procedures call for before you pull the machine apart. Electrical schematics (Cat 326-6377, UENR2643) are at pages 2158-2194 and also provided as a separate 37-page PDF. Hydraulic schematics (Cat 326-5540) follow at pages 2195-2206.
What's Inside This Caterpillar 259B3 Repair Manual
| System | Pages | Key Topics |
|---|
| Air Inlet and Exhaust System | 2 | Air Cleaner, Turbocharger, Exhaust Manifold |
| Basic Engine | 47 | Cylinder Head, Camshaft, Pistons |
| Cooling System | 373 | Radiator, Water Pump, Thermostat |
| Electrical and Starting System | 474 | |
| Engine Arrangement | 497 | Engine Mounts, Engine Assembly |
| Frame and Body | 579 | Frame, Guards, Body Panels |
| Fuel System | 602 | Fuel Injection Pump, Injectors, Fuel Filter, Fuel Lines |
| Hydraulic System | 690 | Control Valve |
| Implements | 1104 | Loader Linkage, Coupler, Bucket |
| Lubrication System | 1155 | Oil Pump, Oil Pan, Oil Filter |
| Machine Arrangement | 1200 | Component Locations, Machine Layout |
| Operator Station | 1216 | |
| Power Train | 1638 | Hydrostatic Drive, Final Drives, Drive Motors |
| Service Equipment and Supplies | 1974 | Special Tools, Fluids, Consumables |
| Torque Specifications | 1992 | Tightening Torques, Bolt Specifications |
| Undercarriage | 2040 | Rollers, Idlers, Track Tension |
| Work Tools | 2146 | Attachments, Auxiliary Hydraulics |
| Electrical System Schematics | 2159-2194 | Cab Wiring, Chassis and Engine Wiring, Cid / Mid / Fmi, Electrical Schematic Symbols |
| Hydraulic System Schematics | 2195-2206 | Fluid Power Symbols, Component Locations, Tap Locations, Implement Pilot Control, S-Turn Resolver Block |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Fan drive gear motor relief valve setting | 4725 +/- 100 kPa (685 psi) | p. 702 |
| Hydraulic oil filter rating | 5 micron | p. 703 |
| Filter bypass valve opening pressure | 345 kPa (50 psi) | p. 704 |
| Filter bypass switch closing pressure | 290 +/- 15 kPa (42 psi) | p. 704 |
| Hydraulic oil cooler bypass check valve opening | 172 kPa (25 psi) | p. 711 |
