中文
PC30-7 Mini Excavator Hydraulic Main Piston Pump Assembly (A10VD17 Type OEM 20S-60-72110 840140003)
Place of Origin:China
Brand Name:HanRui
Model Number:PC30-7
Product Description
Mini Excavator Hydraulic Power Units
HanRui PC30-7 Hydraulic Variable Axial Piston Main Pump (A10VD17 Series)
Precision-engineered direct replacement for 3.0-to-3.5 ton compact excavators. Manufactured to original A10VD17 dual variable displacement axial piston pump standards (Cross Ref: 20S-60-72110 / 840140003). Fully equipped with a rear pilot gear charge pump and hydraulic load-sensing regulators, delivering rapid swashplate stroke response, high volumetric efficiency, and full digging pressure under continuous 26.5 MPa working loads.
⚙️ Pump Model: Uchida Rexroth A10VD17 Dual Piston Pump ⚡ Rated Pressure: 26.5 MPa (3840 PSI) 🛡️ 100% Flow Bench Tested with Pilot Pump
Wholesale Price
$1,250 – $2,400 USD/Unit
Direct factory price — complete turnkey piston pump
MOQ & Dispatch
1 Unit (In Stock)
Ready for worldwide air/sea express dispatch in 1–3 days
Quality Assurance
12 Months
100% flow calibration & pressure holding test verified
A10VD17 Variable Piston Pump Engineering Highlights
⚙️ Dual Variable Swash-Plate System
Twin rotary groups share a single drive shaft, adjusting output displacement dynamically according to pilot load-sensing commands to prevent engine lugging.
🎯 Bimetal Valve Plate & Nitrided Barrel
High-tensile copper-alloy bimetal valve plates paired with mirror-honed nitrided cylinder bores minimize internal clearance leakage under severe 60°C+ thermal conditions.
🚜 Complete Integrated Assembly
Delivered 100% complete with pre-calibrated proportional hydraulic regulators and rear gear pilot pump, eliminating the need for tedious field pressure tuning.
Technical Specifications & Piston Pump Fitment Matrix
| Applicable Machine Models | PC30-7, PC30-7E, PC30R-7, PC35MR-2 (3.0–3.5 Ton Mini Excavator Class) |
| Original Pump Model | Uchida Rexroth A10VD17 Series (Dual Variable Axial Piston Pump) |
| Cross-Reference OEM Numbers | 20S-60-72110, 840140003, 708-1S-00010, 708-1S-00020 |
| Rated Operating Pressure | 24.5 MPa ~ 26.5 MPa (245 – 265 Bar) |
| Flow Delivery Rating | Dual main circuits (~2 × 34 L/min) + rear pilot gear circuit (~12 L/min) |
| Drive Shaft Specification | Standard Involute Spline Shaft with SAE 2-Bolt Pilot Flange |
| Integrated Pilot Pump | Rear-mounted external gear pump for pilot joystick control lines |
| Assembly Status | 100% Complete Plug-and-Play Assembly (Pre-calibrated hydraulic regulators) |
PC30-7 Hydraulic Piston Pump Troubleshooting & Field Diagnostics
Fault 1: Weak Digging Power & Engine Lugs / Stalls Under Heavy Implement Loads
Root Cause: Heavy wear on piston shoes or bimetal valve plates creating severe pressure leakage, or jammed hydraulic regulator spools failing to adjust swashplate angle dynamically.
Field Remedy: Replace the worn unit with a calibrated HanRui A10VD17 main piston pump (20S-60-72110) to immediately eliminate engine overload.
Field Remedy: Replace the worn unit with a calibrated HanRui A10VD17 main piston pump (20S-60-72110) to immediately eliminate engine overload.
Fault 2: Aerated Frothy Hydraulic Fluid & High-Pitched Cavitation Whine
Root Cause: Hardened or damaged drive shaft oil seal allowing negative intake pressure to suck outside air into the main pump suction chamber.
Field Remedy: Inspect suction lines and clamps; if drive shaft groove wear or swashplate bearing play exists, replace the complete pump.
Field Remedy: Inspect suction lines and clamps; if drive shaft groove wear or swashplate bearing play exists, replace the complete pump.
Fault 3: Severe Flow Loss & Sluggish Boom/Arm Cycle Times When Oil Reaches >60°C
Root Cause: High oil temperature lowers fluid viscosity; radial scoring across the cylinder barrel and port plate leads to internal cross-port short-circuiting.
Field Remedy: Flush the hydraulic tank, replace the return filter element, and install a brand-new bench-tested A10VD17 pump.
Field Remedy: Flush the hydraulic tank, replace the return filter element, and install a brand-new bench-tested A10VD17 pump.
Frequently Asked Questions (FAQ)
Q: What is the exact pump model and OEM part number for this PC30-7 main pump?
A: It is manufactured to original Uchida Rexroth A10VD17 dual variable axial piston pump specifications, cross-referenced under OEM part numbers 20S-60-72110 and 840140003.
Q: Does this piston pump assembly arrive complete with the rear gear pilot pump?
A: Yes. It is delivered as a 100% turnkey unit, pre-fitted with the dual-circuit rotary groups, hydraulic pressure/flow regulators, and rear pilot gear pump.
Q: What critical step must be followed before cranking the engine after installation?
A: You must fill the pump housing case completely with clean hydraulic oil through the top case-drain port before startup to avoid dry-friction failure of the pistons and swashplate shoes.
Looking for a Replacement Main Piston Pump for PC30-7?
Share your excavator serial number or pump nameplate photo (A10VD17 / 20S-60-72110) for instant fitment verification, express air shipping rates, and wholesale pricing.
Request Instant Quote & Delivery Schedule
You May Also Like
EX120-5 EX130-5 ZX120 4BG1T 8-97100-388-0 Isuzu 4BG1 Complete Diesel Engine Assembly Compatible with Isuzu Hitachi JCB
Factory-direct wholesale Isuzu 4BG1 4BG1T complete diesel engine assembly (OEM 8-97100-388-0 / 110001810) for Hitachi EX120-5 & ZX120 excavators. Direct Price: $3,800–$6,500 USD (Save 50% vs dealers). 100% dyno tested, 12-month warranty!
SK120-3 SK120-5 SH120-2 MSG-85P YN15V00001F1 KYB MSG-85P Slewing Swing Motor Assembly Compatible with Kobelco Sumitomo Kato
Factory-direct wholesale KYB MSG-85P slewing swing motor assembly (OEM YN15V00001F1 / 18251-09000) compatible with Kobelco SK120-5 & Sumitomo SH120. Direct Price: $2,200–$4,200 USD (Save 50% vs dealers). 100% bench tested, 12-month warranty!
SK330-8 SK350-8 LQ10V00018F1 LC10V00018F1 K3V180DT Hydraulic Main Pump Assembly Compatible with Kobelco
Factory-direct wholesale SK330-8 SK350-8 hydraulic main pump (OEM LQ10V00018F1 / K3V180DT) compatible with Kobelco excavators. Direct Price: $4,500–$8,200 USD (Save 50% vs dealers). 100% bench tested, 12-month warranty!
ZAX200-3 ZX200-3 4653603 4642948 Multi-Way Hydraulic Main Control Valve Assembly Compatible with Hitachi
Factory-direct wholesale ZAX200-3 ZX200-3 main control valve assembly (OEM 4653603 / 4642948) compatible with Hitachi excavators. Direct Price: $2,800–$4,800 USD (Save 50% vs dealers). Solve boom dropping & spool sticking. 100% bench tested!
Contact Us
You Can Contact Us At Anytime!
