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PC20-7 Mini Excavator Hydraulic Triple Gear Pump Assembly (Shimadzu SBR14 Type OEM 705-41-08070 705-41-08160)
Place of Origin:China
Brand Name:HanRui
Model Number:PC20-7
Product Description
Mini Excavator Hydraulic Power Units
HanRui PC20-7 Mini Excavator Hydraulic Triple Gear Pump (Shimadzu SBR14 Type)
Factory-direct replacement engineered for 2.0-to-2.2 ton compact excavators. Manufactured to original Shimadzu SBR14 / SGP1 3-stage triple pump specifications (Cross Ref: 705-41-08070 / 705-41-08160). Features precision-machined alloy gears and high-load bronze bushings, ensuring high volumetric efficiency, responsive multi-implement coordination, and quiet hydraulic operation under continuous 24.5 MPa working loads.
⚙️ Pump Model: Shimadzu SBR14 / SBR(1) ⚡ 3-Stage Triple Pump (11-Tooth Spline) 🛡️ 100% Flow & Volumetric Bench Tested
Wholesale Price
$290 – $680 USD/Unit
Direct factory price — complete 3-section gear pump
MOQ & Dispatch
1 Unit (In Stock)
Ready stock for instant worldwide express delivery
Quality Assurance
12 Months
100% dynamic pressure holding and flow calibration tested
Shimadzu-Standard Manufacturing & Quality Features
⚙️ Micro-Honed Alloy Gears
Gears are forged from premium chrome-molybdenum alloy steel with mirror-finished flanks, reducing fluid cavitation and mechanical gear whine.
🛡️ Pressure-Compensated Bushings
Features low-friction DU composite lead-bronze bushings and floating thrust plates that maintain micro-clearance sealing even when oil temperatures exceed 60°C.
🚜 3-Stage Independent Delivery
Three independent pump chambers cleanly isolate flow between left/right travel circuits, boom/arm digging, and dozer/swing pilot commands without mutual interference.
Technical Specifications & Pump Fitment Matrix
| Applicable Machine Models | PC20-7, PC20MR-2, PC15-3, PC10-7 (2.0–2.2 Ton Mini Excavator Class) |
| Original Pump Model | Shimadzu SBR14 / SBR(1) Series (Triple External Gear Pump) |
| Cross-Reference OEM Numbers | 705-41-08070, 705-41-08160, 705-41-08080, 705-41-08010 |
| Drive Shaft Specification | 11-Tooth Involute Spline Shaft (Standard SAE 2-Bolt Pilot Flange) |
| Rated Working Pressure | 20.6 MPa ~ 24.5 MPa (206 – 245 Bar) |
| Direction of Rotation | Clockwise (Right-Hand Rotation / CW) viewed from shaft front |
| Installation Standard | 100% Direct Bolt-On OEM Replacement (Oil ports match original layout 100%) |
PC20-7 Hydraulic Gear Pump Field Diagnostic Guide
Fault 1: Weak Digging Force & Boom Lift Hesitation When Handling Heavy Soil
Root Cause: Severe wear on the internal side thrust plates or gear tooth tips, creating radial bypass and collapsing volumetric discharge efficiency.
Field Remedy: Replace with a brand-new calibrated HanRui PC20-7 triple gear pump (705-41-08070) to immediately restore original hydraulic power.
Field Remedy: Replace with a brand-new calibrated HanRui PC20-7 triple gear pump (705-41-08070) to immediately restore original hydraulic power.
Fault 2: Aerated Frothy Hydraulic Fluid & High-Pitched Pump Whine
Root Cause: Hardened or aged drive shaft oil seal allowing negative pressure to draw outside air into the intake port during initial start-ups.
Field Remedy: Inspect suction hose clamps; if drive shaft scoring or bushing play is evident, replace the entire pump assembly.
Field Remedy: Inspect suction hose clamps; if drive shaft scoring or bushing play is evident, replace the entire pump assembly.
Fault 3: Abnormal Oil Overheating (>65°C) & Compound Travel / Swing Slowdown
Root Cause: High-pressure oil internally short-circuiting back to the low-pressure suction chamber, turning engine work into extreme heat.
Field Remedy: Flush hydraulic circuits, install new return filters, and swap in a fresh pump to prevent thermal fluid degradation.
Field Remedy: Flush hydraulic circuits, install new return filters, and swap in a fresh pump to prevent thermal fluid degradation.
Frequently Asked Questions (FAQ)
Q: Is this pump a direct bolt-on match for the PC20-7 excavator?
A: Yes. It matches the standard SAE 2-bolt pilot mounting flange, 11-tooth involute drive spline, and original hydraulic flange port locations with zero modifications required.
Q: What is the original manufacturer model for this pump?
A: It is built to the exact blueprint of the original Shimadzu SBR14 / SBR(1) triple external gear pump architecture.
Q: What critical step should be taken before starting the machine after installation?
A: Always prime the pump body with clean hydraulic oil through the port before cranking the engine to ensure proper initial hydrodynamic lubrication of the bushings and gear teeth.
Looking for a Replacement Hydraulic Gear Pump for PC20-7?
Share your machine serial number or old pump nameplate photo (705-41-08070 / 705-41-08160) for immediate fitment verification and competitive wholesale pricing.
Request Instant Quote & Delivery Time
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