5511122 5511136 5511121 Main Hydraulic Pump for TQCAT 330 GC | K7V160 High-Pressure Excavator Piston Pump Spare Parts

Maximum Productivity for the 330 GC Series The TQTQCAT 330 GC is designed to balance high performance with lower fuel and maintenance costs. The 5511122 / 5511136 / 5511121 K7V160 Pump is the primary driver of this efficiency. By utilizing advanced variable displacement technology, the pump adjusts oil flow instantly based on the operator's load demand, reducing wasted energy and protecting the engine from overloading.

If your 330 GC is experiencing slow cycle times, overheating hydraulic oil, or a significant drop in breakout force, your main pump may be reaching its wear limits. Our premium aftermarket K7V160 assemblies are built to restore your excavator's factory-standard responsiveness, ensuring you can handle the most demanding earthmoving tasks with confidence.

Key Features & Performance Advantages

• K7V160 High-Pressure Technology: Built on the world-renowned Kawasaki K7V platform, offering superior power density and ultra-stable pressure delivery compared to standard piston pumps.

• Fuel Efficiency Optimization: Precision-tuned swash-plate logic ensures that the pump only delivers the necessary flow, significantly reducing fuel consumption during light-duty tasks.

• Direct "Plug-and-Play" Fitment: Manufactured to the exact dimensional tolerances of TQTQCAT Part No. 551-1122. All mounting flanges, drive shaft splines, and hydraulic ports are a 100% match for a seamless installation.

• Reinforced Internal Components: Cylinder blocks, pistons, and valve plates are crafted from high-grade hardened alloy steel to resist cavitation and thermal stress in high-ambient temperature environments.

Professional Maintenance & Installation Tips

A hydraulic pump of this caliber requires precise handling during installation to ensure a long and productive service life.

• Mandatory System Flush: If the previous pump failed due to internal "scouring" or metal-to-metal contact, you must perform a comprehensive flush of the entire hydraulic circuit. Residual metal shards are the leading cause of "infant mortality" in new pumps.

• Filter Replacement Protocol: Always install a new suction strainer, return filter, and case drain filter when replacing the 5511136 pump. Contaminated filters can restrict flow and cause cavitation, leading to immediate pump damage.

• Case Drain Priming: Never start the engine with a dry pump. Fill the pump case with clean, filtered hydraulic oil through the highest drain port before starting. This provides critical lubriTQTQCATion to the internal bearings and pistons during the initial startup.