Description
HPV165 708-2H-00450 Hydraulic Pump Assembly by Tatan Overview
The HPV165 708-2H-00450 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 Komatsu PC400-8, PC400LC-8, and PC450-8 40-ton mining excavators, replacing your worn hydraulic pump with a Tatan complete assembly eliminates electronic engine bogging, restores full 650 L/min multi-function flow speed, and cures internal pressure bypass across demanding quarry and mining applications.
Driven directly by the 257 kW SAA6D125E-5 diesel engine and routing massive volume fluid through the PC400-8 main control valve, this hydraulic main pump incorporates precision micro-lapped bimetal valve plates, heavy-duty 708-2H cast housings, calibrated PC/LS regulator blocks, and an integrated auxiliary pilot gear pump, ensuring 100% direct bolt-on installation with flywheel housings and chassis hydraulic lines.
Key Attributes & Technical Parameters for HPV165 708-2H-00450 Hydraulic Pump
| Product Category | Hydraulic Pump Assembly | Warranty | 1 Year / 12 Months |
| Specific Valve Model | Komatsu HPV165+165 Heavy Tandem Piston Pump | Brand Name | Tatan |
| Compatible Equipment | Komatsu PC400-8 | PC400LC-8 | PC450-8 | OEM Part Number | 708-2H-00450 / 708-2H-00460 |
| Matched Engine Series | Komatsu SAA6D125E-5 Heavy Engine (257 kW) | Place of Origin | Guangdong, China |
| Max Relief Pressure | 34.3 – 37.3 MPa (343 – 373 bar) | Pilot Control Pressure | 3.9 MPa (39 bar) |
| Spool Precision Spec | Micro-Lapped < 0.003 mm Clearance | Quality Status | 100% Brand New Monoblock Assembly |
| Machinery Test Report | Provided (100% Bench Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Hydraulic Fluid Spec | ISO VG 46 / VG 68 Anti-Wear Oil | Packaging | Export Wooden Box Packaging |
Supported Excavator Machinery Brands & Global Coverage
In addition to Komatsu, Tatan manufactures and distributes replacement main hydraulic pumps and rotating components for major equipment brands:
45-Ton Heavy Mining Hydraulic Flow Architecture & High-Pressure Engineering
Delivering over 650 L/min of continuous fluid volume under 37.3 MPa relief peaks requires specialized metallurgical endurance. Tatan supplies heavy-duty complete 708-2H tandem pumps, reinforced nine-hole slipper retainer plates, high-lead bimetal valve plates, and pre-calibrated PC-EPC solenoid blocks across global mining operations:
⚙️ Electronic PC-EPC Modulation
Precision proportional solenoids match pump displacement to 257 kW engine torque curves in milliseconds under heavy rock breakout.
🔄 Anti-Fatigue Slipper Retainers
Heavy-gauge alloy retainer plates resist intense hydraulic shock from 210/220 rock breakers, preventing shoe detachment.
⚡ High-Lead Bimetal Valve Plates
Specialized bronze-alloy diffusion bonded to steel backings prevents face smearing and eliminates casing overheating under 650 L/min flow.
Application Scenarios & Buyer Value
When upgrading or replacing your 40-ton excavator hydraulic heart with our HPV165 708-2H-00450 Hydraulic Pump, buyers achieve maximum operational uptime and flow control:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Komatsu PC400-8 Pump Replacement | 1:1 direct bolt-on installation eliminates engine stalling and restores simultaneous boom, arm, and swing speeds. |
| Hydraulic Overhaul Workshops | Avoids the complex labor of internal lapping; saves mechanic hours with pre-adjusted PC/LS regulator valves. |
| Mining & Quarry Fleet Operations | Heavy-duty bimetal cylinder groups withstand continuous 37.3 MPa relief pressures during heavy rock-breaker operations. |
| Heavy Equipment Parts Stockists | Fast-moving, high-demand 40-ton hydraulic pump inventory ready for immediate shipment to minimize customer downtime. |
HPV165 708-2H-00450 Hydraulic Pump OEM Diagnostic & Troubleshooting Guide
Use this OEM manual hydraulic diagnostic guide to troubleshoot hydraulic pump symptoms on your Komatsu PC400-8 excavator:
| Hydraulic Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Engine stalls / bogs heavily during compound dig (thick black smoke) | PC-EPC proportional solenoid coil degraded or PC regulator spool jammed by oil varnish, failing to destroke pump swashplate under 257 kW peak load. | Test PC-EPC solenoid resistance (7.5-14.5 Ω), recalibrate PC valve spring, or install Tatan pre-calibrated HPV165 unit. |
| 2. Sluggish movement across all cylinders (heavy joysticks) | Self-reducing pressure valve spool seized by contamination, dropping pilot supply below 2.2 MPa (target 3.9 MPa). | Inspect pilot gear pump pressure; clean self-reducing valve spool or replace complete Tatan pump assembly. |
| 3. Bronze glitter & brass shavings in return filter element | Nine-hole retainer plate fatigue cracking or bronze valve plate scoring under continuous 210/220 breaker hammer vibration. | Stop operation immediately; flush hydraulic tank and lines, install Tatan new 708-2H-00450 pump and new return filter. |
| 4. Screeching whining noise and high case-drain heat (> 90°C) | Cradle swashplate support bearings worn or suction hose liner delamination starving rotary barrel suction ports under 650 L/min flow. | Inspect suction line O-rings, replace hydraulic fluid with clean ISO VG 46, 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:
HPV165 708-2H-00450 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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