Komatsu 708-2G-00700 hydraulic pump for Komatsu PC300-8 excavator
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Product Overview
This high‑quality aftermarket variable axial piston pump with OEM numbers 708‑2G‑00700 and 708‑2G‑00150 acts as the core hydraulic power source for Komatsu PC300‑8 medium‑large excavator. Matched with the machine’s closed load‑sensing hydraulic system, it converts engine mechanical power into high‑pressure hydraulic energy, supporting heavy‑load digging, rock loading, bulk material handling and large‑scale earth‑moving operations commonly seen in quarries, infrastructure construction and mining sites. Subjected to frequent load fluctuations, shock impact from rock excavation and potential hydraulic fluid contamination, internal core components including cylinder block, piston shoe assemblies, valve plate, drive shaft and regulator unit will suffer gradual wear. Once performance degrades, the excavator will display multiple obvious malfunctions: insufficient digging breakout force, laggy combined movements, engine dragging under heavy load, continuous hydraulic oil temperature rise, obvious vibration and howling noise originating from the pump compartment, shaft‑end oil seepage and unstable system pressure. Manufactured against original drawing standards, this aftermarket main pump keeps consistent regulator parameters and mounting dimensions, enabling direct drop‑in replacement to restore the excavator’s original working efficiency.
Core Advantages
1. Heavy‑duty friction pair for tough site working conditions
Core matching components go through strict heat‑treatment and high‑precision grinding processes. Optimized fitting clearance greatly lowers internal leakage under long‑term high‑pressure circulation. It delivers strong anti‑cavitation capability, resisting wear damage brought by mixed impurities in hydraulic oil, well adapting to quarry and earth‑moving heavy‑duty working scenarios.
2. Pre‑adjusted load‑sensing regulator assembly
Every finished pump is debugged on professional hydraulic test bench. Flow and pressure parameters are calibrated to match original factory specifications. It can accurately respond to real‑time load changes of the excavator, effectively avoid engine lugging when executing compound actions, balance output power and fuel consumption for medium‑large construction machinery.
3. High interchangeability to shorten equipment downtime
Mounting flange size, spline specification, oil port layout and regulator installation position are fully consistent with OEM standards. Repair technicians can complete pump replacement without modifying pipelines or adjusting structures. It helps construction fleets and maintenance shops cut down overhaul time and reduce economic losses caused by machine shutdown.
4. Reinforced housing and comprehensive sealing configuration
Integral high‑density cast housing can absorb vibration and pressure impulse generated during rock digging operation. Premium shaft seal together with complete O‑ring sets effectively prevent high‑pressure oil leakage, stop outside dust and particles from invading pump interior, protecting the whole hydraulic system from secondary abrasion failure.
5. Cost‑competitive aftermarket maintenance option
Genuine original main pumps usually come with high price and long delivery cycles. This aftermarket main pump provides dependable comprehensive performance with more favorable cost. It is a practical spare‑part solution for local repair workshops, construction equipment rental fleets and international excavator parts distributors.
Manufacturing & Quality Control
Our production line is dedicated to hydraulic pump assemblies for Komatsu medium and large tonnage excavators. We implement strict full‑range quality control: raw‑material composition inspection, hardness testing for heat‑treated components, dimensional verification of key parts, dust‑free assembling procedure, finished‑product bench test covering pressure, flow, noise and simulated heavy‑load working condition. Only qualified units can proceed to packaging procedure. Finished pumps are coated with anti‑rust oil, wrapped with shock‑resistant cushioning materials and packed in fumigated export wooden cases, protecting goods against scratch, deformation and oxidation during long‑distance ocean transportation. We support large‑batch wholesale, stable continuous supply, and small trial orders are welcomed.
Frequently Asked Questions
Q1: What abnormal conditions indicate the main pump needs inspection or replacement?
A: If your PC300‑8 excavator occurs weak digging power, slow boom‑arm compound actions, obvious vibration and abnormal noise near main pump, persistent hydraulic oil overheating, engine drag under load, or metal impurities found inside hydraulic filter, you need to carry out system pressure test and check main pump assembly.
Q2: Can this hydraulic pump fit other Komatsu excavator models?
A: This pump is specially produced for Komatsu PC300‑8. Different excavator main pumps have differences in displacement and regulator setting. Please double‑check your old part number 708‑2G‑00700 / 708‑2G‑00150 before placing order to avoid installation mismatch.
Q3: What critical matters need attention during installation work?
A: Fully clean hydraulic oil tank, pipelines and hydraulic cooler, replace new hydraulic oil as well as all filter elements. Guarantee clean assembling environment to prevent impurities entering pump inner chamber. After assembly, complete exhaust operation, run low‑speed no‑load running‑in test before putting excavator into formal heavy‑load construction.
Q4: Warranty explanation
A: The warranty covers defects generated in manufacturing process. Damage caused by contaminated hydraulic oil, wrong installation operation, cavitation erosion and long‑time overload service will not be included in warranty coverage. Please follow Komatsu official maintenance manual for all overhaul operations.