Final Drive PC40-7 PC50MR PC55MR IHI40JX EC45 DH55 SK40SR SK50 CAT305.5 PC45R-8 Genuine Parts

Aftermarket Brand New Final Drive comes with one year manufactuer warranty. Fully assembled hydraulic Travel Motor and reduction/planetary gearbox, filled with oil, ready to bolt on and go.

Nachi hydraulic final drive gear oil typically requires a combination of hydraulic oil and gear oil. The hydraulic oil, often VG46 or VG32 anti-wear hydraulic oil, circulates to drive the final drive motor and provide lubrication and cooling. The gear oil, typically SAE 80W/90 with a GL5 grade, lubricates the reduction gears and bearings. The specific grade and type may vary depending on the application and operating conditions. 
Hydraulic Oil:

•     Purpose: Powers the hydraulic motor, ensuring rotation and providing lubrication and cooling. 
• Common Grades: VG46 or VG32 anti-wear hydraulic oil. 
• Viscosity: Measured in centistokes (cSt), with 32 being the thinnest and 68 being the thickest. 
• Temperature Range: Typically suitable for -20 to 90 degrees Celsius. 

Gear Oil:

•     Purpose: Lubricates the gears and bearings within the final drive reduction. 
• Common Grade: SAE 80W/90 with GL5 rating. 
• Viscosity: Around 120 centistokes at 100°F (38°C). 
• EP Additives: Gear oils often contain extreme pressure (EP) additives, which may have a sulfurous smell. 
• Checking and Changing: Gear oil levels should be checked regularly (e.g., every 100 working hours) and changed when necessary.