
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
Technical specifications verified by the Aspect Plus technical catalog.