Description
SBS80 311-7405 Hydraulic Pump Assembly Overview
The SBS80 311-7405 Hydraulic Pump assembly manufactured by Tatan is a heavy-duty dual-tandem variable displacement axial piston unit belonging to our Hydraulic Pump Assembly classification. Engineered specifically for Caterpillar 315D and 315D L 15~17 ton excavators, replacing your worn hydraulic pump with a Tatan complete unit eliminates engine stalling under load, restores fast negative flow control response, and cures internal pressure bypass across demanding earthmoving applications.
Driven directly by the 86 kW Cat C4.2 ACERT diesel engine and delivering high-pressure flow to the main control valve, this hydraulic main pump incorporates precision micro-lapped bimetal valve plates, calibrated power shift regulators, NFC control spools, and an integrated rear auxiliary pilot gear pump, ensuring 100% direct bolt-on installation with flywheel housings and chassis hydraulic lines.
Key Attributes & Technical Parameters for SBS80 311-7405 Hydraulic Pump
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Caterpillar SBS80 Dual Tandem Piston Pump | Brand Name | Tatan |
| Compatible Equipment | Caterpillar 315D | 315D L Excavator | OEM Part Number | 311-7405 / 391-9425 / 10R-9073 |
| Matched Engine Series | Cat C4.2 ACERT Engine (86 kW / 115 HP) | Place of Origin | Guangdong, China |
| Max Relief Pressure | 35.0 MPa (350 bar / 5076 PSI Implement) | Pilot Control Pressure | 4.0 MPa (40 bar Rear Gear Pump) |
| Spool Precision Spec | Micro-Lapped < 0.003 mm Clearance | Quality Status | 100% Brand New Complete Assembly |
| Machinery Test Report | Provided (100% Bench Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | ISO VG 46 Anti-Wear Hydraulic Oil | Packaging | Export Wooden Box Packaging |
Supported Excavator Machinery Brands & Global Coverage
In addition to Caterpillar, Tatan manufactures and distributes replacement main hydraulic pumps and internal rotary components for major construction equipment builders:
Caterpillar Hydraulic Pump Architecture & Core Component Inventory
Operating 15~17 ton medium excavators under tough trenching loads requires strict internal tolerance control. Tatan maintains an extensive warehouse inventory of OEM-grade SBS80 hydraulic components, including regulator blocks, pilot gear pumps, cylinder barrel rebuild kits, bimetal valve plates, and proportional solenoids:
⚙️ Power Shift Regulators
Factory-calibrated NFC and power shift regulator blocks ready for instant drop-in alignment with the Cat C4.2 engine.
🔄 Rotary Barrel Kits
Heavy-duty 80cc bimetal cylinder blocks, piston shoes, retainers, and micro-lapped valve plates for complete overhauls.
⚡ Proportional Solenoids
High-durability PS PRV proportional solenoids ensuring precise swashplate angle destroke under heavy digging loads.
Application Scenarios & Buyer Value
When upgrading or replacing your 15-ton excavator hydraulic heart with our SBS80 311-7405 Hydraulic Pump, buyers achieve maximum operational uptime and flow control:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Caterpillar 315D Pump Replacement | 1:1 direct bolt-on installation eliminates engine stalling and restores fast negative flow control response. |
| Hydraulic Overhaul Workshops | Avoids the complex labor of internal bore lapping; saves mechanic hours with pre-adjusted regulator valves. |
| Utility & Civil Fleet Operations | Heavy-duty bimetal cylinder groups withstand continuous 35.0 MPa relief pressures during heavy bucket breakout. |
| Heavy Equipment Parts Stockists | Fast-moving, high-demand 15-ton hydraulic pump inventory ready for immediate shipment to minimize customer downtime. |
SBS80 311-7405 Hydraulic Pump OEM Diagnostic & Troubleshooting Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot hydraulic pump symptoms on your Caterpillar 315D excavator:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Engine stalls / bogs heavily during compound dig (thick black smoke) | Power shift proportional pressure reducing valve (PRV) coil degraded or regulator spool jammed, failing to destroke pump swashplates under 86 kW peak load. | Check PRV solenoid resistance (17.5-24.5 Ω), inspect regulator control pressure, or install Tatan pre-calibrated SBS80 unit. |
| 2. Sluggish movement across all cylinders (slow boom hoist) | Negative flow control (NFC) differential pressure signal blocked by contaminated pilot orifice, keeping pump at minimum swashplate angle. | Clean pilot line filters, verify 4.0 MPa pilot gear pump pressure, or replace complete Tatan pump assembly. |
| 3. Bronze glitter & brass shavings in return filter element | Piston shoe retaining plate fatigue cracking or bronze valve plate scoring from hydraulic oil contamination. | Stop operation immediately; flush hydraulic tank lines, install Tatan new 311-7405 pump and new 10μm return filter. |
| 4. Screeching whining noise and high case-drain heat (> 85°C) | Cradle swashplate support bearings worn or suction hose liner delamination starving rotary barrel suction ports. | Inspect suction line O-rings, refill clean ISO VG 46 hydraulic fluid, and bolt on new balanced main pump. |
Transport Packaging & Certified Manufacturing Standards
Precision hydraulic piston pumps require zero-vibration transit and absolute cleanliness. Every unit is vacuum-sealed and packaged in solid export timber crates:
SBS80 311-7405 Hydraulic Pump FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
Reviews
There are no reviews yet.