5504341 5511121 5511122 5511135 20R9713 K7V180 Hydraulic Main Pump Assembly 550-4341 551-1121 551-1122 551-1135 20R-9713 for CAT E336 E340 E345GC Excavator

The K7V180 Hydraulic Main Pump Assembly is a high-performance OEM replacement designed for Caterpillar E336, E340, and E345GC excavators.

This complete hydraulic pump assembly combines a high-efficiency axial piston main pump with an integrated pilot (piggyback) pump, delivering stable hydraulic flow and pressure for all machine functions. Manufactured with precision-engineered components and premium materials, it ensures outstanding reliability, smooth operation, and extended service life in demanding construction and mining environments.

Every pump is professionally tested before shipment to guarantee dependable performance and immediate installation.

This is a complete hydraulic pump assembly supplied ready for installation, including the main piston pump and integrated pilot pump.

OEM Part Numbers:

• 550-4341
• 551-1121
• 551-1122
• 551-1135
• 20R-9713

Designed with advanced axial piston technology, the K7V180 pump provides:

• Stable hydraulic pressure
• High flow efficiency
• Fast hydraulic response
• Powerful digging performance
• Smooth machine operation

Helping maximize excavator productivity while reducing fuel consumption.

Manufactured from premium-quality alloy steel and high-strength cast housing, ensuring:

• Excellent wear resistance
• High-pressure capability
• Superior sealing performance
• Long operating life
• Reliable performance under harsh working conditions

Suitable for mining, quarry, road construction, and heavy earthmoving applications.

Every component is machined using advanced CNC equipment to maintain OEM-level precision.

Benefits include:

• Accurate hydraulic output
• Low operating noise
• Reduced vibration
• Improved system efficiency
• Longer component lifespan

Every hydraulic pump undergoes strict quality inspection before shipment.

Testing procedures include:

• Hydraulic Pressure Test
• Flow Rate Test
• Leakage Inspection
• Rotation Test
• Final Performance Verification

Each unit is shipped ready for installation.

Compatible with Caterpillar Excavators

• CAT E336
• CAT E340
• CAT E345GC

OEM Part Numbers

• 550-4341
• 551-1121
• 551-1122
• 551-1135
• 20R-9713

If you are unsure about compatibility, please provide your machine model, serial number, or original part number for confirmation.

At JISION, we specialize in supplying premium hydraulic components for construction machinery worldwide.

Our Advantages

• Over 10 Years of Industry Experience
• OEM & Aftermarket Solutions
• Competitive Factory Pricing
• Strict Quality Control
• 100% Performance Tested
• Fast Worldwide Shipping
• Professional Export Packaging
• Technical Support Available
• Large Inventory Ready for Delivery

Each hydraulic pump is carefully packed to ensure safe international transportation.

Packaging Includes:

• Anti-rust protection
• Plastic protective film
• Shockproof foam protection
• Heavy-duty export carton
• Wooden case available for sea freight

Shipping Options:

• DHL
• FedEx
• UPS
• TNT
• Air Freight
• Sea Freight

Worldwide shipping available.

Yes. This product is supplied as a complete K7V180 hydraulic main pump assembly with the integrated pilot pump, ready for direct installation.

This is a premium OEM replacement hydraulic pump manufactured to OEM specifications, offering reliable performance and excellent value.

Absolutely. Every hydraulic pump is individually tested for pressure, flow, leakage, and overall performance before delivery.

Simply send us:

• Machine Model
• Machine Serial Number
• Original Part Number

Our technical team will verify compatibility before shipment.

Yes. Most popular hydraulic pumps are available in stock for fast worldwide delivery.

Looking for reliable hydraulic components for your excavator?

JISION supplies a complete range of construction machinery hydraulic parts, including:

• Hydraulic Main Pumps
• Hydraulic Fan Pumps
• Swing Motors
• Travel Motors
• Main Control Valves
• Final Drives
• Hydraulic Cylinders
• Hydraulic Spare Parts

Contact us today for factory-direct pricing, professional technical support, and fast worldwide delivery.