Hydraulic Main Pump Assy 708-1L-00390 for Komatsu D275 Series
1. Product Overview
The Hydraulic Main Pump Assy 708-1L-00390 is a crucial component designed to deliver high-performance hydraulic power to Komatsu D275A-5R, D275AX-5, and D275AX-5EO bulldozers. As the heart of the hydraulic system, this main pump ensures efficient and precise operation of the machine's work equipment, including blade control, ripper functions, and steering, enabling optimal productivity in demanding environments.
2. Key Features and Selling Points
Superior Performance: Engineered for high flow rates and precise pressure control, ensuring responsive and powerful hydraulic functions.
Exceptional Durability: Constructed from high-grade alloy steels and precision-machined components to withstand extreme operating conditions, heavy loads, and prolonged use.
Reliable Operation: Designed to meet or exceed OEM specifications, providing stable and consistent hydraulic output for uninterrupted work.
Optimized Efficiency: Contributes to improved fuel efficiency and reduced operational costs by minimizing energy loss within the hydraulic system.
Perfect Compatibility: Directly compatible with Komatsu D275A-5R, D275AX-5, and D275AX-5EO models, ensuring seamless integration and optimal system performance.
3. Technical Specifications
| Parameter | Description |
|---|
| Part Number | 708-1L-00390 |
| Product Type | Hydraulic Main Pump Assy |
| Applicable Models | Komatsu D275A-5R, D275AX-5, D275AX-5EO |
| Pump Type | Variable Displacement Axial Piston Pump (Typical for Main Hydraulic Pumps) |
| Material | High-Grade Alloy Steel, Precision Components |
| Condition | New / Remanufactured (availability may vary) |
| Weight (approx.) | ~1200 kg (Note: This weight can vary and often includes packaging. Please confirm exact weight with supplier.) |
| Warranty | Varies by supplier, typically 6-12 months |
4. Applicable Equipment & Application Scenarios
The Hydraulic Main Pump Assy 708-1L-00390 is specifically designed for Komatsu D275A-5R, D275AX-5, and D275AX-5EO bulldozers. These heavy-duty crawler dozers are renowned for their powerful engines, robust construction, and ability to handle large-scale earthmoving tasks. They are primarily used in:
Mining Operations: Used for overburden removal, coal seam stripping, and maintaining haul roads in large open-pit mines. Their immense pushing power makes them indispensable in these environments.
Large-Scale Construction Projects: Essential for site preparation, land clearing, road building, dam construction, and creating foundations for major infrastructure projects.
Quarrying: Efficiently move large quantities of rock and aggregate, contributing to the extraction process in quarries.
Land Reclamation & Environmental Projects: Utilized for moving soil and reshaping landscapes in large-scale reclamation efforts.
Case Study Example: In a major highway construction project, a Komatsu D275AX-5 equipped with a reliable 708-1L-00390 hydraulic main pump demonstrated superior efficiency in cutting and spreading fill material across challenging terrain. The pump's consistent pressure and flow ensured smooth and precise blade control, significantly reducing operational time and improving the overall project timeline. Its robust design allowed for continuous operation, minimizing downtime even under heavy load conditions.
5. Related & Similar Products
In addition to the 708-1L-00390, Guangshu Supply Chain (CGSC) also offers a wide range of hydraulic components for Komatsu heavy machinery. These similar products serve similar functions (providing hydraulic power) but are tailored for different machine models or specific hydraulic circuits:
Other Komatsu D275 Series Pumps: For D275A-5R, D275AX-5, D275AX-5EO, other part numbers like 705-52-30250, 708-1L-00310, 708-1L-00340, 708-1L-00300, 708-1L-00370 are also available, serving different hydraulic circuits or model variations.
Komatsu Excavator Main Pumps: Such as those for PC200-6, PC200-7, PC300-7, PC400-7 series excavators. These pumps (e.g., 708-2L-xxxx series) are vital for the boom, arm, bucket, and swing functions of excavators.
Komatsu Smaller Bulldozer Hydraulic Pumps: Pumps for models like D65EX, D85EX, D155AX, which operate in medium-to-heavy earthmoving tasks.
Auxiliary Hydraulic Pumps & Parts: Including gear pumps, steering pumps, and various hydraulic pump repair kits and spare parts for a wide range of Komatsu equipment.
Our team can assist you in finding the exact hydraulic component required for your specific Komatsu equipment model.
6. Common Installation & Maintenance Issues and Solutions
Proper installation and regular maintenance are critical for maximizing the lifespan and performance of your Hydraulic Main Pump Assy 708-1L-00390. Here are common issues and their solutions:
Issue: Reduced Hydraulic Power/Slow Response
Problem: Could be due to internal pump wear, clogged filters, low hydraulic fluid level, or air in the system.
Solution: Check hydraulic fluid level and quality, replace hydraulic filters regularly, inspect for leaks, and bleed air from the system. If wear is significant, pump overhaul or replacement may be needed.
Issue: Oil Leaks
Problem: Damaged seals, loose fittings, or cracked pump casing.
Solution: Regularly inspect all hoses, fittings, and seals for signs of leakage. Replace worn or damaged seals immediately and ensure all connections are properly torqued.
Issue: Excessive Noise or Vibration
Problem: Often caused by cavitation (air in the fluid), misalignment of the pump to the engine, worn bearings, or contamination.
Solution: Check fluid level and ensure proper de-aeration. Verify pump-to-engine alignment. Listen for specific noises to identify worn components and replace as necessary.
Issue: Overheating Hydraulic Fluid
Problem: Insufficient fluid level, clogged cooler, operating under continuous overload, or internal pump inefficiency.
Solution: Maintain correct hydraulic fluid levels. Clean hydraulic cooler fins. Avoid continuous operation beyond rated capacity. Internal inspection of the pump may be required if it's generating excessive heat.
General Maintenance Best Practices:
Fluid Maintenance: Use only recommended hydraulic fluid type and ensure it is clean and free of contamination. Change fluid and filters at manufacturer-specified intervals.
Regular Inspections: Conduct daily visual checks for leaks, loose connections, and unusual wear.
Temperature Monitoring: Keep an eye on hydraulic fluid temperature gauges to prevent overheating.
Operating Practices: Adhere to recommended operating procedures to prevent unnecessary strain on the hydraulic system.
Documentation: Keep detailed records of all maintenance performed.
小松D275系列液压主泵总成 708-1L-00390
1. 产品概述
液压主泵总成 708-1L-00390 是为小松 D275A-5R、D275AX-5 和 D275AX-5EO 推土机提供高性能液压动力的关键部件。作为液压系统的核心，该主泵确保了机器工作设备的精准高效运行，包括铲刀控制、松土器功能和转向，从而在严苛环境中实现最佳生产力。
2. 主要特点与卖点
卓越性能： 专为高流量和精确压力控制设计，确保液压功能响应迅速且强大有力。
超凡耐用： 采用优质合金钢和精密加工部件制造，能够承受极端操作条件、重负荷和长时间使用。
运行可靠： 设计符合或超越原厂（OEM）标准，提供稳定一致的液压输出，确保工作不间断。
优化效率： 通过最大限度地减少液压系统内的能量损失，有助于提高燃油效率并降低运营成本。
完美兼容： 直接兼容小松 D275A-5R、D275AX-5 和 D275AX-5EO 型号，确保无缝集成和最佳系统性能。
3. 技术参数
| 参数 | 描述 |
|---|
| 零件号 | 708-1L-00390 |
| 产品类型 | 液压主泵总成 |
| 适用型号 | 小松 D275A-5R, D275AX-5, D275AX-5EO |
| 泵类型 | 变量轴向柱塞泵（主液压泵的典型类型） |
| 材质 | 高等级合金钢，精密组件 |
| 状况 | 全新 / 再制造（供货情况可能有所不同） |
| 重量（约） | 约1200公斤（注意：此重量可能因包装等因素而异。请与供应商确认准确重量。） |
| 保修 | 因供应商而异，通常为6-12个月 |
4. 适用设备及应用场景
液压主泵总成 708-1L-00390 专为小松 D275A-5R、D275AX-5 和 D275AX-5EO 推土机设计。这些重型履带式推土机以其强大的发动机、坚固的结构以及处理大型土方工程任务的能力而闻名。它们主要用于：
采矿作业： 用于大型露天矿山的剥离、煤层剥离和维护运输道路。其巨大的推力使其在这些环境中不可或缺。
大型建筑项目： 对于场地准备、土地清理、道路建设、水坝建设以及重大基础设施项目的地基建设至关重要。
采石场： 高效移动大量岩石和骨料，为采石场的开采过程做出贡献。
土地复垦与环境项目： 用于大型复垦工作中移动土壤和重塑地貌。
案例分析： 在一个重要的公路建设项目中，一台配备了可靠的 708-1L-00390 液压主泵的小松 D275AX-5 在处理复杂地形的切填作业中表现出卓越的效率。该泵稳定一致的压力和流量确保了铲刀的平稳精确控制，显著缩短了操作时间并改善了整体项目进度。其坚固的设计即使在重负荷条件下也能实现连续运行，最大限度地减少了停机时间。
5. 相关及相似产品
除了 708-1L-00390，广数供应链（CGSC）还提供广泛的小松重型机械液压部件。这些相似产品具有类似功能（提供液压动力），但适用于不同的机器型号或特定的液压回路：
其他小松 D275 系列泵： 对于 D275A-5R、D275AX-5、D275AX-5EO，其他零件号如 705-52-30250、708-1L-00310、708-1L-00340、708-1L-00300、708-1L-00370 也可供选择，服务于不同的液压回路或型号变体。
小松挖掘机主泵： 例如适用于 PC200-6、PC200-7、PC300-7、PC400-7 系列挖掘机的泵。这些泵（例如 708-2L-xxxx 系列）对于挖掘机的动臂、斗杆、铲斗和回转功能至关重要。
小松小型推土机液压泵： 适用于 D65EX、D85EX、D155AX 等型号的泵，这些型号主要用于中重型土方工程。
辅助液压泵及部件： 包括齿轮泵、转向泵以及各种液压泵维修套件和适用于各种小松设备的备件。
我们的团队可以协助您为特定的小松设备型号找到所需的确切液压部件。
6. 常见安装与维护问题及解决方案
正确的安装和定期的维护对于最大限度地延长液压主泵总成 708-1L-00390 的使用寿命和性能至关重要。以下是常见问题及其解决方案：
问题：液压动力减弱/响应缓慢
原因： 可能是内部泵磨损、滤清器堵塞、液压油液位过低或系统中有空气。
解决方案： 检查液压油液位和油品质量，定期更换液压滤清器，检查是否泄漏，并排出系统中的空气。如果磨损严重，可能需要对泵进行大修或更换。
问题：漏油
原因： 密封件损坏、接头松动或泵壳开裂。
解决方案： 定期检查所有软管、接头和密封件是否有泄漏迹象。立即更换磨损或损坏的密封件，并确保所有连接均已正确拧紧。
问题：噪音或振动过大
原因： 通常由气蚀（流体中存在空气）、泵与发动机对中不良、轴承磨损或污染引起。
解决方案： 检查液位并确保适当的脱气。验证泵与发动机的对中情况。注意特定噪音以识别磨损部件并按需更换。
问题：液压油过热
原因： 液压油液位不足、冷却器堵塞、持续超负荷运行或泵内部效率低下。
解决方案： 保持正确的液压油液位。清洁液压冷却器散热片。避免持续超出额定容量运行。如果泵产生过多的热量，可能需要进行内部检查。
一般维护最佳实践：
油液维护： 仅使用推荐的液压油类型，并确保其清洁且无污染。按照制造商规定的间隔更换油液和滤清器。
定期检查： 每天进行目视检查，查看是否有泄漏、连接松动和异常磨损。
温度监测： 密切关注液压油温度计，防止过热。
操作规范： 遵守推荐的操作程序，以防止液压系统承受不必要的应力。
文件记录： 详细记录所有已进行的维护工作。
