Bulldozers: D41A-6, D50A-2/-3 (auxiliary pump).
Excavators: PC120-6, PC200-6 (as a pilot pump for main piston pumps).
Driven Systems:
Pilot control valves for precise blade/ripper positioning.
Lubrication of transmission components in bulldozers.
Oil cooling circuits in excavator hydraulic systems.
Installation & Maintenance
Installation Notes:
Ensure a tight seal on inlet/outlet ports to prevent air ingestion (vacuum pressure ≤0.3 bar).
Align the drive shaft with ≤0.1 mm radial and ≤0.2° angular misalignment.
Maintenance Tips:
Filtration: Use a 25-micron suction filter and 10-micron return filter.
Oil Contamination: Monitor for metal particles (indicates gear wear) using a magnetic drain plug.
Oil Viscosity: Cold-start viscosity should not exceed 1,000 cSt to avoid pump cavitation.
