Product Overview

This OEM Caterpillar Hydraulic Gear Pump, encompassing part numbers such as 5J3646, 5J4502, 5J4894, 5J5070, and 5J5924, is engineered to deliver reliable and efficient hydraulic power for a wide range of heavy-duty Caterpillar machinery. Designed with precision and built to stringent OEM specifications, these gear pumps are crucial for maintaining the optimal performance and longevity of your equipment.

Caterpillar hydraulic gear pumps are known for their robust construction, utilizing high-end materials and precision tolerances to ensure maximum durability and seamless integration within complex hydraulic systems. They are particularly well-suited for open-center applications requiring increased pressure and temperature capabilities.

Key Product Parameters

• Type: Hydraulic Gear Pump (some models may be vane pump cartridges, e.g., 5J4502, 5J5070)

• Displacement: Fixed displacement (common for gear pumps)

• Material: Durable cast iron or high-quality metal alloys for extreme pressure and temperature resistance

• Construction: Two-piece cast iron design for enhanced durability and prevention of shaft seal leaks

• Operating Environment: Designed for demanding heavy-duty use and harsh environments

• Flow Rate: Varies by model (e.g., 5J5070 cartridge group: 64 L/min (17 GPM))

• Weight: Varies by model (e.g., 5J3646 ~2.5 kg, 5J4894 ~10 kg)

Note: Specific parameters may vary slightly between the exact part numbers listed. Please refer to Caterpillar's official documentation for precise specifications for your model.

Product Advantages and Selling Points

• Guaranteed Compatibility: OEM parts are specifically designed for Caterpillar equipment, ensuring seamless integration and optimal performance.

• Superior Quality: Undergo rigorous testing and quality control processes, translating to enhanced durability, reliability, and long service life.

• High Resistance to Contamination: Engineered to withstand harsh operating conditions and provide consistent performance even with less-than-ideal fluid conditions.

• Extended Component Life: Optimized with features like rugged journal bearings, high-pressure end plates, and high-temperature seals.

• Minimized Downtime: Meets machine specifications out of the box, ensuring quick installation and reliable operation, reducing costly interruptions.

• Cost-Effectiveness: While an OEM investment, the long-term reliability and reduced maintenance contribute to overall lower operating costs.

Applicable Equipment

These Caterpillar Hydraulic Gear Pumps (including 5J3646, 5J4502, 5J4894, 5J5070, 5J5924) are essential components across various Caterpillar heavy machinery, playing a vital role in their hydraulic systems.

• Loaders: Specifically, part number 5J4502 is known to fit Caterpillar Loaders including 980, 980B, 977K, 977L, 988. Part number 5J5070 also fits Wheel-Type Loader 980G.

• Dozers: Part number 5J4502 is applicable to Dozers 824B, 825B, 826B, 834, 835. Part number 5J4894 is a cartridge hydraulic pump for Caterpillar Wheel Dozers. 5J5070 also fits Wheel Dozers 844, 844H.

• Scrapers: Part number 5J4502 fits Caterpillar Scraper 621B. Part number 5J5070 also fits Wheel Tractor-Scrapers 613C, 613C II, 631C, 637, 613G.

• Tractors: Models such as D8H, D9G, DUAL D9G, D8K (associated with similar pump models like 3P-4002).

• General Heavy Equipment: Excavators, other types of loaders, bulldozers, cranes, and agricultural machinery commonly utilize Caterpillar hydraulic gear pumps.

Compatible Engines:

These pumps are designed to integrate with various Caterpillar engines, including but not limited to: 3306, 3406, 3406E, C15, 3116, 3126, 3208, 3406C, 3412D, 3412E, C27, C6.6, and 342.

Application Scenarios and Case Analysis

Caterpillar hydraulic gear pumps are at the heart of the hydraulic systems that enable heavy equipment to perform critical tasks across diverse industries.

• Construction Sites: In bulldozers like the D8K or D9G, these pumps power the blade's lift and tilt functions, crucial for earthmoving, grading, and site preparation. For loaders such as the 980 series, the hydraulic pump drives the bucket's arm and tilt, facilitating efficient material handling and loading operations.

  Case Study: A large infrastructure project relies on Caterpillar 980B Loaders. The consistent hydraulic pressure provided by the OEM 5J4502 pump ensures fast cycle times for loading aggregates into dump trucks, directly impacting project timelines and efficiency. Its robust design minimizes breakdowns, preventing costly delays.

• Mining Operations: In challenging mining environments, heavy machinery like large wheel dozers (e.g., 844H) depend on powerful hydraulic systems. The gear pumps manage the steering and braking, as well as the operation of specialized attachments for ore extraction and material movement.

  Case Study: In an open-pit mine, a Caterpillar 844H Wheel Dozer with an OEM 5J4894 hydraulic pump operates continuously in abrasive conditions. The pump's precision engineering and high-temperature resistance ensure stable hydraulic power for precise dozing and pushing operations, even under extreme load and dust, contributing to safe and productive mining.

• Agricultural Applications: While less common for the largest pumps, smaller Caterpillar machinery used in agriculture, such as some compact track loaders or telehandlers, also rely on hydraulic gear pumps for tasks like operating attachments, steering, and lifting.

  Case Study: A large-scale farm uses a Caterpillar 613C Wheel Tractor-Scraper equipped with the 5J5070 hydraulic pump for land leveling and ditching. The pump's consistent flow rate enables precise control of the scraper blade, essential for efficient water management and field preparation, directly boosting crop yields.

Related and Similar Products

Beyond the specific models listed, Caterpillar offers a comprehensive range of hydraulic pumps, including other gear pumps, piston pumps, and vane pumps, each designed for specific applications and equipment types.

• Piston Pumps: Known for high-pressure capabilities and efficiency.

• Common Models: Examples include 200-3406 (for Excavators 322C, 325C), 2966714 (for Backhoe Loaders 414E, 416E, 422E, 428E), A10VD43SR (for Excavator E70B).

• Applicable Equipment: Excavators (e.g., 322C, 325C, E70B), large loaders, and machinery requiring variable displacement and high pressure.

• Vane Pumps: Valued for smooth operation and compact design, often used in less demanding applications or as cartridge kits.

• Common Models: 3G7663, 7J0558, and similar to 5J5070 which is a vane pump cartridge.

• Applicable Equipment: Steering systems, auxiliary circuits, and some smaller to medium-sized construction equipment.

• Other Gear Pumps: Similar in principle to the 5J series, offering robust performance for various applications.

• Common Models: 3P-4002, 217-2595, 5M-6701, 3P-6293, 217-2597 (for Tractors D8H, D9G, D8K), 315-3145 (for Wheel Loader 992K), 292-8767 (for Wheel Loaders 962H, 950H).

• Applicable Equipment: Tractors, various wheel loaders, pipelayers, and other machinery requiring consistent flow rates.

Installation and Maintenance: Common Issues & Solutions

Proper installation and regular maintenance are critical for maximizing the lifespan and performance of your Caterpillar Hydraulic Gear Pump.

Common Issues:

• Cavitation: Formation and collapse of vapor bubbles, causing internal damage and noise.

• Fluid Contamination: Particles, water, or air (aeration) in the hydraulic fluid can cause wear and reduce efficiency.

• Excessive Temperature/Overheating: Leads to fluid degradation, seal failure, and premature wear.

• Improper Fluid Viscosity: Fluid too thin or too thick can impair pump performance and cause wear.

• Fluid Leaks/Failing Seals: External or internal leaks lead to pressure loss and reduced efficiency.

• Pump Not Self-Priming/No Delivery: Often due to incorrect rotation, clogged filters, or lack of fluid.

• Wear and Stuck Components: Internal component wear or sticking can cause noise and inefficiency.

• Overpressure and Overloading: Exceeding design limits can severely damage the pump.

Solutions:

• Regular Fluid Analysis: Monitor hydraulic fluid cleanliness and condition, replace filters, and ensure correct viscosity.

• Maintain Proper Fluid Levels and Cooling: Prevent overheating by ensuring adequate fluid levels and proper cooling system function.

• Inspect and Replace Seals: Regularly check for leaks and replace worn seals, gaskets, and O-rings.

• Verify Rotation Direction: During installation, always confirm the correct direction of rotation for the pump.

• Pre-fill Pump Before Installation: Always add hydraulic oil to the pump before installation to ensure proper priming.

• Regular Inspections: Periodically check for abnormal noise, vibrations, or temperature spikes that may indicate issues.

• Adhere to Operating Limits: Do not exceed the pump's designed pressure and flow limits.

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