708-1S-00222 PC30MR-1/PC30UU Hydraulic Pump For Komatsu PC30MR-1/PC30UU excavator

708-1S-00222 PC30MR-1/PC30UU Hydraulic Pump For Komatsu PC30MR-1/PC30UU excavator Featured Image
  • 708-1S-00222 PC30MR-1/PC30UU Hydraulic Pump For Komatsu PC30MR-1/PC30UU excavator

Short Description:

DX520 hydraulic fan motor is aftermarket replacement spare part for Doosan DX520 large mining excavator. It drives radiator fan for machine thermal management system to control engine coolant and hydraulic oil temperature.

Product Detail

Product Tags

description

708-1S-00222 variable piston hydraulic pump is the main hydraulic power unit for Komatsu PC30MR-1 / PC30UU mini excavator, driven directly by engine. It converts mechanical power into hydraulic energy and delivers variable flow to all hydraulic actuators. The swash plate variable control mechanism automatically adjusts displacement to match load requirement. During digging and loading work, pump increases flow to provide powerful digging force; under idle or light-load travel condition, flow reduces to save fuel and reduce heat generation.
The pump uses high-precision piston and valve plate pair with special surface hardening treatment, improving wear resistance when hydraulic oil contains fine contaminants. Ductile cast iron housing undergoes stress relief annealing to eliminate internal stress, resisting vibration and thermal deformation under repeated short-cycle impact loads.High-performance FKM sealing kit provides reliable sealing performance under fluctuating pressure and temperature. Every hydraulic pump passes strict bench test before shipment, including pressure test, flow detection and leakage inspection.

product parameters

Part No：708-1S-00222
Product Type：Variable Displacement Axial Piston Main Hydraulic Pump
Applicable Equipment：Komatsu PC30MR-1 / PC30UU Mini Excavator
Control Mode：Swash plate variable control
Displacement：22 cc/rev
Nominal Working Pressure：21 MPa (210 bar)
Max Instantaneous Peak Pressure：24 MPa (240 bar)
Rated Rotation Speed：2200 rpm
Max Allowable Rotation Speed：2600 rpm
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +105℃
Main Material：Ductile cast iron housing, hardened piston & valve plate, FKM fluorine rubber seal
Surface Treatment：Precision grinding, surface hardening, stress relief annealing, anti-rust coating
Interchangeability：1:1 OEM interchangeable, direct bolt-on installation
Product Condition：Brand new aftermarket part, 100% hydraulic bench tested

advantage

- 22cc compact variable displacement design, perfectly matched for mini excavator power demand
Compact 22cc variable displacement realizes flexible power output, meeting the multi-action combined operation requirement of PC30MR-1/PC30UU mini excavator without excessive power consumption.
- Integrated built-in control valve assembly for load sensing regulation
Built-in load sensing control assembly automatically adjusts pump output flow following load changes, reducing energy loss and lowering system heat generation during compound movements.
- Reinforced hardened piston & valve plate friction pair for long service life
High precision hardened piston and valve plate pair improves anti-wear property, resisting abrasion caused by tiny particles in hydraulic oil under frequent short-cycle operation.
- Mini-size compact housing, specially designed for narrow engine compartment
Small-volume cast housing saves installation space, perfectly fits the compact layout of PC30MR-1/PC30UU engine compartment, easy for disassembly and maintenance.
- Mini excavator cyclic short-load bench reliability test
Each pump undergoes cyclic short impact load bench test simulating frequent digging and swing operation of PC30MR-1/PC30UU, verifying long-term stable performance.

FAQ 

Q1: Which machine does 708-1S-00222 hydraulic pump fit?
A1: This hydraulic main pump fits Komatsu PC30MR-1 and PC30UU mini excavator. Confirm machine serial number before purchase.

Q2: What hydraulic function does this main pump support?
A2: It provides pressurized variable hydraulic oil for boom, arm, bucket, travel and swing hydraulic circuits, to realize all digging and moving actions of mini excavator, widely used in municipal renovation, landscaping and indoor demolition projects.

Q3: What are typical failure symptoms of worn main pump?
A3: Typical symptoms: weak digging force under load, slow combined movements, pressure drop during heavy digging, abnormal internal noise inside pump body, continuous hydraulic oil temperature rise, pump casing oil leakage.

Q4: What inspections should be done before installing new hydraulic pump?
A4: Inspect hydraulic oil quality and filter condition, check the relief valve and control valve block. Fully flush hydraulic tank and pipelines to remove metal debris. Replace degraded hydraulic oil before assembly.

Q5: Why excavator actions remain slow after main pump replacement?
A5: The fault may not come from pump. Check relief valve setting, clogged filter, damaged control valve, air trapped inside hydraulic circuit. Air bleeding must be completed after installation.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

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