PVD-3B

Nachi PVD-3B — variable displacement axial piston pump 66 cm³

Nachi PVD-3B is the largest frame size of the split-flow PVD series manufactured by Nachi. The design features two independent sections in a single housing, each generating an equal flow — synchronous supply to the left and right travel motors prevents the machine from deviating from a straight course without operator intervention. Designed for excavators in the 7–12 tonne class. Within the frame size, variants PVD-3B-54P, PVD-3B-56P and PVD-3B-60 are available — with different displacements and shaft rotation directions (P — right-hand, L — left-hand) while sharing the same rotary group and housing.

Full model range in the section Nachi PVD series

Technical specifications PVD-3B

• Displacement (max.): 33×2 = 66 cm³/rev
• Section configuration (PVD-3B-56P): 28+28+18+4.5 cm³/rev
• Max. pressure: 245 bar
• Max. speed: 2400 rpm
• Nominal speed: 2200 rpm
• Min. speed: 900 rpm
• Shaft: Z=15, centring 127 mm
• Mounting flange: SAE C 2-bolt
• Weight: 27 kg

PVD-3B model code structure

Example: PVD-3B-54P-18G5-4185F

• PVD — split-flow piston pump
• 3B — frame size (largest, max. 66 cm³/rev, SAE C, Z=15)
• 54 / 56 / 60 — maximum total displacement, cm³/rev
• P — right-hand rotation; L — left-hand rotation
• 18 — displacement of the larger gear section (18 cm³/rev)
• G5 — seal type and gear pump configuration
• 4185F / 4191A — serial specification suffix

Installed in equipment

• Kobelco

  • SK60 — Crawler excavator
  • SK75 — Crawler excavator
  • SK75UR — Crawler excavator
  • SK75UR-2 — Crawler excavator
  • SK75UR-3 — Crawler excavator

OEM numbers PVD-3B

• Nachi

  • PVD-3B-54P-18G5-4185F
  • PVD-3B-54P
  • PVD-3B-54L
  • PVD-3B-56P-18G5-4191A
  • PVD-3B-56P-18G5
  • PVD-3B-56
  • PVD-3B-60

Spare parts for Nachi PVD-3B

• Cylinder block Rotor
• Drive Shaft
• Separation Bush
• Ball guide
• Disk Spring
• Snap Ring
• Slider
• Coupling of drive shaft
• Cylinder block press pin
• Charge Pump
• Roller Bearing
• Cradle Bearing Set
• Retainer Plate
• Swash plate (cam rocker)
• Piston shoe
• Rotor Spring
• Seal kit pump
• Shaft Seal
• Wire
• Valve plate
• Ball guide washer
• Pressure Override Valve
• Control Valve Regulator
• Regulator assembly
• Servo Piston

Repair and service PVD-3B

Diagnostics and repair of pump Nachi PVD-3B: monitoring operating pressure and leaks, inspection of the piston group and valve plate, and bench testing after repair.

Contact us — we will repair pump PVD-3B and select genuine spare parts.

Spare Parts Diagram Nachi PVD-3B-54/60

Spare Parts Diagram