What is the lubricant specified for all fire apparatus hydrostatic systems?

The lubricant specified for all fire apparatus hydrostatic systems is AW-68. This is due to its optimal viscosity and performance characteristics, which are essential in the challenging operating conditions that fire apparatus encounter. AW-68 provides adequate lubrication at various temperatures and pressures, ensuring smooth operation of the hydrostatic systems.

Using the correct hydraulic oil is critical for preventing wear and tear on components, enhancing efficiency and reliability in emergency situations. Each oil option has different viscosity grades—AW-68 being a medium viscosity oil that balances protection and performance. Other weight options like AW-32 or AW-46 may not provide the same level of thermal stability or lubrication under heavy loads typically experienced in fire apparatus, while AW-100, being much thicker, could lead to decreased efficiency in fluid movement within the system.