Product Overview

Revitalize your equipment's hydraulic system with our premium replacement Hydraulic Vane Pump 35VQ38 Cartridge Kit. Designed to meet or exceed OEM specifications, this kit is a cost-effective solution for repairing worn or damaged Vickers 35VQ series pumps commonly found in CAT excavators and other heavy machinery. It includes essential internal components to restore your pump's performance and efficiency.

Part Numbers: 1U3953, 1002961, 1U2667, 1U2669

Specifically engineered for the 35VQ38 model, this cartridge kit provides a reliable and durable alternative to complete pump replacement.

Product Specifications

While specific performance can vary based on the overall pump condition and system, this 35VQ38 cartridge kit is designed to restore performance characteristics typical of the series. General specifications for the 35VQ38 series include:

• Displacement: Approximately 7.4 cu.in./rev (122 cc/rev)

• Maximum Continuous Pressure: Up to 2000 PSI (138 Bar)

• Maximum Speed: Up to 2400 RPM

• Flow Rate (at Max Speed & Pressure): Approximately 69 GPM (263 L/min)

• Type: Balanced Vane Pump Cartridge Kit

• Interchangeability: Direct replacement for Vickers/Eaton 35VQ38 cartridges

Note: Performance figures are typical for the 35VQ38 series and actual results may vary depending on system conditions and other factors.

Advantages and Selling Points

• Cost-Effective Repair: Repairing a pump with a new cartridge kit is significantly less expensive than replacing the entire pump unit.

• Restores Peak Performance: Replacing the worn cartridge revitalizes pump efficiency, pressure, and flow rate, bringing your hydraulic system back to optimal operation.

• High-Quality Components: Manufactured with precision and durable materials to ensure long service life in demanding environments.

• Direct Replacement: Engineered for perfect fit and function within existing Vickers 35VQ38 pump housings.

• Minimizes Downtime: A cartridge replacement is generally quicker than a full pump overhaul or replacement, reducing equipment downtime.

Applicable Equipment

This 35VQ38 Cartridge Kit is designed for use in Caterpillar (CAT) excavators and other heavy machinery that utilize Vickers/Eaton 35VQ series hydraulic vane pumps. While specific models can vary, the 35VQ series is commonly found in various CAT equipment requiring reliable hydraulic power, including but not limited to certain series of excavators, loaders, and other construction or mining vehicles.

Application Scenarios and Case Analysis

Hydraulic vane pumps like the 35VQ series are critical in the hydraulic circuits of heavy equipment, providing power for various functions. This cartridge kit is essential for maintaining these systems in demanding applications such as:

• Construction Sites: Powering the boom, stick, bucket, and travel functions of excavators and loaders for digging, lifting, and material handling. A worn pump can lead to slow cycle times and reduced lifting capacity. Replacing the cartridge kit quickly restores these vital functions.

• Mining Operations: Used in excavators and shovels for overburden removal and ore loading. High pressure and flow are necessary for efficient operation in harsh conditions. A failing pump cartridge can severely impact productivity.

• Material Handling: In larger forklifts or specialized handling equipment, hydraulic pumps provide power for lifting and tilting. Consistent and strong hydraulic pressure is key to safe and efficient operation.

Case Study Snippet: An older CAT excavator on a construction site was experiencing noticeably slow hydraulic response and reduced digging force. Diagnostics revealed low pressure output from the main hydraulic vane pump (a 35VQ38). Instead of the costly and time-consuming process of sourcing and replacing the entire pump, the owner opted for a replacement cartridge kit. A trained technician installed the new cartridge, which significantly improved the pump's performance, restoring the excavator's speed and power to near-original levels, minimizing project delays and saving significant repair costs.

Related and Similar Products

Beyond the 35VQ38, other Vickers/Eaton VQ series cartridge kits and related hydraulic pump parts are commonly used in similar equipment. These may include:

• Other VQ Series Cartridge Kits: Such as 20VQ, 25VQ, 35VQ (other displacements), 45VQ, and double pump configurations (e.g., 3520VQ, 4525VQ). These are used in a wide range of mobile and industrial hydraulic applications, often in larger or different capacity machines.

• Complete Vane Pumps: Including single and double configuration VQ series pumps for cases where the entire pump housing is damaged or a complete replacement is preferred.

• Seal Kits: For repairing minor leaks in the pump housing.

• Shafts and Bearings: Other internal wear components that might need replacement during a pump repair.

These related products are often found in various CAT, Komatsu, John Deere, and other heavy machinery requiring reliable hydraulic vane pump power.

Common Installation and Maintenance Issues & Solutions

Proper installation and maintenance are crucial for the longevity and performance of your hydraulic vane pump cartridge kit. Here are some common issues and their solutions:

• Issue: Pump fails to prime or has low flow after installation.        
  Solution: Ensure the pump and lines are properly filled with hydraulic fluid before starting. Check for air leaks in the suction line connections. Verify the direction of rotation is correct.

• Issue: Low pressure or erratic pressure.        
  Solution: This can indicate internal leakage within the new cartridge if not installed correctly, or issues with system relief valves. Ensure the cartridge is seated properly and all bolts are torqued to specification. Check system filters for clogging.

• Issue: Excessive noise or vibration.        
  Solution: Can be caused by air in the system (cavitation), misalignment during installation, or fluid contamination. Bleed air from the system. Ensure the pump is correctly mounted and aligned with the drive. Check fluid cleanliness and filter status.

• Issue: Premature wear of the cartridge.        
  Solution: Often due to contaminated hydraulic fluid or operating the pump outside its recommended temperature or pressure limits. Implement a strict fluid maintenance schedule, including regular filter changes and fluid analysis. Ensure the system's relief valve is set correctly.

• Issue: Leaks around the pump seals.        
  Solution: Ensure all seals and O-rings in the cartridge kit and pump housing are correctly installed and not pinched. Verify that mounting bolts are properly tightened.

Recommendation: Installation should be performed by trained personnel following the manufacturer's service manual to ensure correct procedures and torque specifications are adhered to.