PVD-1B

Nachi PVD-1B — variable displacement axial piston pump 34 cm³

Nachi PVD-1B is a split-flow variable displacement axial piston hydraulic pump of the PVD series. It generates two equal independent flows from two sections within a single housing, ensuring synchronous supply to the left and right travel motors and guaranteeing straight-line travel of the crawler undercarriage without operator correction. The next frame size in the series after PVD-0B, designed for larger-class mini excavators. Variants within the frame size (PVD-1B-28P, PVD-1B-29BP, PVD-1B-32P, PVD-1B-32BP and others) differ in displacement while sharing the same rotary group and housing. Right-hand (P) and left-hand (L) shaft rotation variants are available.

Full model range in the section Nachi PVD series

Technical specifications PVD-1B

• Displacement (max.): 17×2 = 34 cm³/rev
• Section configuration: 16+16+10.5+4.5 cm³/rev
• Max. pressure: 245 bar
• Max. speed: 2700 rpm
• Nominal speed: 2500 rpm
• Min. speed: 900 rpm
• Shaft: Z=13, centring 101.6 mm
• Mounting flange: SAE B 2-bolt
• Weight: 15 kg

PVD-1B model code structure

Example: PVD-1B-32P-11G5-4191A

• PVD — split-flow piston pump
• 1B — frame size (max. 34 cm³/rev)
• 28 / 29 / 30 / 31 / 32 / 34 — maximum total displacement, cm³/rev
• B (optional) — gear section or porting variant (PVD-1B-32BP vs PVD-1B-32P)
• P — right-hand rotation; L — left-hand rotation
• 11G5 / G8 — gear section and seal configuration code
• 4191A / 4521G — serial specification suffix

Installed in equipment

• Caterpillar

  • 302.5C — Mini excavator
  • 6040 — Mining shovel
  • 6040 FS — Mining shovel
  • RH170 — Mining shovel
• Hitachi

  • EX35 — Mini excavator
  • ZX25 — Mini excavator
  • ZX27U-2 — Mini excavator
  • ZX27U-3F — Mini excavator
  • ZX29U-3 — Mini excavator
  • ZX30 — Mini excavator
  • ZX30U — Mini excavator
  • ZX30U-2 — Mini excavator
  • ZX30UR-2 — Mini excavator
  • ZX30UR-3 — Mini excavator
  • ZX35U-2 — Mini excavator
  • ZX40 — Mini excavator
  • ZX50 — Mini excavator
• JCB

  • JS8030 — Mini excavator
• Komatsu

  • PC30 — Mini excavator
• Kubota

  • KX61-3 — Mini excavator
• Yanmar

  • VIO30 — Mini excavator
• Yuchai

  • YC35-6 — Mini excavator
  • YC45 — Mini excavator

OEM numbers PVD-1B

• Nachi

  • PVD-1B-20L
  • PVD-1B-24P
  • PVD-1B-28P
  • PVD-1B-29BP-11G5-4521G
  • PVD-1B-29P
  • PVD-1B-30L
  • PVD-1B-31BP
  • PVD-1B-32P-11G5-4191A
  • PVD-1B-32P-11G5
  • PVD-1B-32P-G8
  • PVD-1B-32BP
• Caterpillar

  • 241-7972
• JCB

  • 20/925683

Spare part numbers PVD-1B

• JCB

  • 20/925683
  • 20/901873
  • 20/951484
  • 20/951485
  • 333/P8281
  • 333/P8285
  • 333/P8287
  • 333/P8289
  • 333/P8290
  • 333/P8292
  • 333/P8293
  • 333/P8294
  • 333/P8295
  • 333/P8296
  • 333/P8297
  • 333/P8298
  • 333/P8299
  • 333/P8300
  • 333/P8303
  • 333/P8304
  • 333/P8306
  • 333/P8307

Spare parts for Nachi PVD-1B

• 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-1B

We accept pump Nachi PVD-1B for repair: full diagnostics of hydraulic parameters, assessment of wear of pistons and cylinder block, seal inspection and bench testing after restoration.

Contact us — we will repair PVD-1B and provide spare parts with quality warranty.

Spare Parts Diagram Nachi PVD-1B

Spare Parts Diagram