Description
SBS140 322-8733 Hydraulic Pump Assembly Overview
The SBS140 322-8733 Hydraulic Pump Assembly manufactured by Tatan is a heavy-duty tandem variable displacement axial piston main pump belonging to our Hydraulic Pump Assembly classification. Engineered in strict compliance with international ISO industrial fluid power standards, replacing your failing pump with this complete SBS140 322-8733 Hydraulic Pump Assembly unit eliminates sluggish actuator response, high-temperature fluid degradation, and engine stalling under digging loads on Caterpillar 330D, 330D L, 330D LN, and 336D 30-to-36 ton excavators.
Constructed strictly to Caterpillar OEM standards, this unit houses dual 140 cc/rev rotating groups, high-density spheroidal iron cylinder blocks, and precision-ground swashplates. Factory pre-dressed with negative flow control (NFC) and cross-sensing constant power regulators, it delivers an exact match for Cat C9 engine torque curves and main control valve banks.
Key Attributes & Parameters for SBS140 322-8733 Hydraulic Pump Assembly
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Pump Model | Caterpillar SBS140 / SBS140B Tandem Pump | Brand Name | Tatan |
| Compatible Equipment | Caterpillar 330D | 330D L | 336D Excavator | OEM Part Number | 322-8733 / 283-6116 / 315-4400 |
| Displacement per Section | 140 cc/rev x 2 Dual Flow (280 cc Total) | Rated Working Pressure | 34.3 MPa (343 Bar / 4975 PSI) |
| Peak Boost Pressure | 36.8 MPa (368 Bar / 5337 PSI) | Control System | Negative Flow Control & Cross-Sensing PRV |
| Machinery Test Report | Provided (100% Bench Flow Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Drive Shaft Type | Heavy-Duty SAE Involute Spline | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Main Pump Unit | Packaging | Export Wooden Box Packaging |
Supported Machinery Brands & Hydraulic Pump Coverage
In addition to Caterpillar, Tatan manufactures replacement complete hydraulic main pumps, rotating groups, and control regulators for leading machinery brands:
Application Scenarios & Buyer Value
When resolving hydraulic performance degradation with our SBS140 322-8733 Hydraulic Pump Assembly, workshops and equipment owners secure immediate field advantages:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| CAT 330D Main Pump Replacement | Swapping to a complete SBS140 322-8733 Hydraulic Pump Assembly cuts machine repair downtime by up to 75% compared to piecemeal barrel and valve plate overhauls. |
| Hydraulic Service Workshops | Eliminates the risks of uneven hand-lapping on warped bimetal valve plates and uncalibrated swashplate servo pistons. |
| Quarry & Earthmoving Contractors | Restores rapid simultaneous boom hoist and bucket curl speeds without hydraulic cavitation or thermal oil breakdown. |
| International Machinery Stockists | Ready-to-ship replacement main pump inventory supporting high-population Caterpillar 330D and 336D machines worldwide. |
SBS140 322-8733 Hydraulic Pump OEM Diagnostic Guide
Use this technical diagnostic guide to identify main hydraulic pump failures on your Caterpillar 330D excavator:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Sluggish cycle times & weak bucket breakout force | Excessive internal slippage between bronze-faced valve plates and cylinder barrels, reducing working pressure below 25 MPa. | Replace with a complete pre-tested SBS140 322-8733 Hydraulic Pump Assembly. |
| 2. Cat C9 engine bogs down or stalls under heavy digging | Cross-sensing power regulator spool stuck or out of calibration, failing to destroke swashplate angle as working pressure spikes. | Calibrate power control springs, flush pilot circuits, or swap to a pre-adjusted complete pump unit. |
| 3. High-pitched whining noise & pump case vibration | Inlet suction line restriction, dirty tank strainer, or aeration from deteriorated input shaft oil seals causing severe cavitation. | Clean suction strainers, replace return filters, prime the pump casing, and install a brand-new pump unit. |
| 4. Hydraulic oil temperature spikes (>85°C) during light grading | Continuous high-pressure fluid bypassing worn piston slipper pads back to case-drain, generating severe friction heat. | Inspect case-drain flow rates, flush oil cooler passages, and install a new factory-sealed pump assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan SBS140 pump assembly is pre-flushed with hydraulic preservation oil, fitted with threaded steel port caps, wrapped in vapor-barrier film, and bolted inside an export-grade wooden shipping crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy hydraulic assemblies and bulk fleet replenishment.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic components are manufactured under ISO 9001 certified quality control systems and strictly comply with international industrial pressure standards.
SBS140 322-8733 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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