Caterpillar 300.9D Mini Hydraulic Factory Service & Shop Manual


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Complete workshop & service manual with electrical wiring diagrams for Caterpillar 300.9D Mini Hydraulic. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

This service manual for Caterpillar 300.9D Mini Hydraulic is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

UENR5416 – Schematic (300.9D Mini Hydraulic Excavator Electrical System)
UENR0478 – Specifications (300.9D Mini Hydraulic Excavator)
UENR0478 – Systems Operation (300.9D Mini Hydraulic Excavator)
UENR0478 – Testing & Adjusting (300.9D Mini Hydraulic Excavator)
UENR1774 – Schematic (300.9D Mini Excavator Hydraulic System)
UENR2937 – Specifications (300.9D VPS Mini Hydraulic Excavator Machine Systems)
UENR3279 – Disassembly & Assembly (3TNV70 & 3TNV76 Engines for Caterpillar Built Machines)

EXCERPT:
Cooling System – Check
This engine has a pressurized cooling system. A pressurized cooling system has two advantages. The cooling system can be operated in a safe manner at a temperature higher than the normal boiling point (steam) of water.
This type of system prevents cavitation in the water pump. Cavitation is the forming of low-pressure bubbles in liquids that are caused by mechanical forces. The formation of an air pocket or a steam pocket in this type of cooling system is difficult.