Description
PSVL-42CG 266-6943 Hydraulic Pump Assembly Overview
The PSVL-42CG 266-6943 Hydraulic Pump assembly manufactured by Tatan is an integrated multi-flow variable displacement axial piston unit belonging to our Hydraulic Pump Assembly classification. Engineered specifically for Caterpillar CAT 303.5, 303.5C CR, 303.5D, and 303.5E 3.5-ton mini excavators, replacing your worn pump with a Tatan complete assembly eliminates compound motion deceleration, restores digging breakout power, and cures internal thermal bypass across demanding utility trenching and landscaping projects.
Driven directly by the diesel engine assembly and routing pressure flow through the C0170 main control valve, this PSVL-42CG 266-6943 Hydraulic Pump combines dual variable piston pumps (2 × 21 cm³/rev) with an integrated auxiliary gear pump, ensuring 100% direct bolt-on installation with flywheel drive couplings and chassis hydraulic hard lines.
Key Attributes & Technical Parameters for PSVL-42CG 266-6943 Hydraulic Pump
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | KYB PSVL-42CG / PSVL-42CG-9 Variable Pump | Brand Name | Tatan |
| Compatible Equipment | Caterpillar CAT 303.5 | 303.5C CR | 303.5D | 303.5E | OEM Part Number | 266-6943 / 284-8038 / 374-2025 |
| Matched Engine Series | Mitsubishi S3Q2 / Cat C1.8 Diesel (23.6 kW) | Place of Origin | Guangdong, China |
| Max Operating Pressure | 24.5 MPa (245 bar / 3553 PSI Continuous) | Peak Overload Pressure | 27.5 MPa (275 bar / 3988 PSI Peak) |
| Spool Precision Spec | Micro-Lapped Bimetal Plate < 0.003 mm | Quality Status | 100% Brand New Assembly with Regulators |
| Machinery Test Report | Provided (100% Bench Flow Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | ISO VG 46 Anti-Wear Hydraulic Oil | Packaging | Export Wooden Box Packaging |
Comprehensive Hydraulic Pump & Component Inventory
Tatan maintains extensive factory inventory of complete tandem piston pumps, regulators, pilot gear pumps, cylinder block rebuild kits, and bimetal valve plates across global machinery lines:
Supported Excavator Machinery Brands & Global Coverage
In addition to Caterpillar compact excavators, Tatan manufactures and supplies replacement hydraulic main pumps, regulators, and rotating barrel groups across global equipment brands:
Application Scenarios & Buyer Value
When contractors search to compare Caterpillar 303.5 hydraulic pump replacement cost and upgrade their machine with our PSVL-42CG 266-6943 Hydraulic Pump, they achieve direct machine uptime and lower cost per hour:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Caterpillar 303.5 Pump Replacement | 1:1 direct bolt-on installation eliminates tracking pull and restores full digging power on boom and arm cylinders. |
| Compact Machinery Repair Workshops | Avoids the complex labor of internal lapping; saves mechanic hours with pre-tested, factory-calibrated dual flow balance. |
| Landscaping & Drainage Contractors | Maintains stable 24.5 MPa operating pressures during continuous auxiliary auger drilling and rock-breaking hammer tasks. |
| Equipment Parts Stockists | High-demand 3.5-ton hydraulic pump inventory packaged in solid export wooden crates ready for immediate global dispatch. |
PSVL-42CG 266-6943 Hydraulic Pump Diagnostic & Troubleshooting Guide
Use this technical guide to diagnose common hydraulic pump symptoms on Caterpillar 303.5 series mini excavators:
| Hydraulic Fault Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Boom hoisting slows down accompanied by engine bogging | PSVL regulator power-limiting control spool sticking failing to destroke pump displacement as pressure exceeds 20 MPa. | Replace with Tatan complete PSVL-42CG 266-6943 Hydraulic Pump assembly with factory-calibrated regulators matched to S3Q2 engine output. |
| 2. Single track pulls to one side during simultaneous blading | P1 or P2 rotary group volumetric loss or swashplate servo piston seal degradation causing uneven flow output. | Install Tatan new tandem pump with precision-matched dual rotating barrel groups; flush contaminated oil lines. |
| 3. Fine bronze glitter & copper dust in return filter element | Piston slipper pads worn thin or separated from swashplate thrust plate due to contaminated hydraulic fluid under heavy hammer vibration. | Stop machine immediately to prevent control valve contamination; install fresh complete pump and clean suction strainers. |
| 4. Digging breakout fades rapidly once oil reaches 75°C | Excessive clearance between cylinder barrel face and bimetal valve plate allowing high-pressure fluid to bypass into casing. | Install Tatan new hydraulic pump with micro-lapped bimetal valve plates (< 0.003 mm tolerance) and new suction O-rings. |
Transport Packaging & Certified Quality Assurance
Precision multi-flow hydraulic pumps require absolute shock protection. Every Tatan unit is sealed and packaged in solid export timber crates:
✈️ Express Air Courier
Partnered with DHL, FedEx, and UPS for 3-7 day priority delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL container ocean freight for bulk equipment parts replenishment.
📦 Export Wooden Crates
Solid fumigated timber cases lined with thick shockproof foam to prevent transit damage.
PSVL-42CG 266-6943 Hydraulic Pump FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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