Caterpillar 307B Mini Hyd Excavator Service Repair Manual
Caterpillar hydraulics deliver power and control to keep material moving at high volume.
Dramatically increased control responsiveness aids operation and improves cycle time.
■ Control movements better matched to hydraulic action for improved operator performance.
■ Improved swing damping restrains drift and improves positioning during finishing and lifting applications.
Hydraulic cross-sensing system
improves productivity with faster implement speeds and quicker, stronger pivot turns.
■ 100 percent of engine horsepower deliverable as hydraulic power.
■ Full power to a single motor for strong, fast turns. Balanced power to two pumps for straight travel.
Cylinder block is cast iron for improved wear resistance. The upper part is laser hardened to reduce oil consumption and internal component wear.
Heat resistant aluminum alloy pistons have a short compression height, reducing weight and improving efficiency. The piston ring set consists
of three rings, which are treated for wear resistance. Forged, high carbon steel connecting rods with smaller connecting rod to crank radius ratio results in a lightweight, powerful, compact engine.