K3V112 Hydraulic Pump for Excavator spare parts

Short Description:

The K3V112 hydraulic pump is a high-displacement variable plunger pump widely used as the original main pump for 20–25 ton medium and large excavators.

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Product Detail

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description

The K3V112 hydraulic pump adopts an upgraded integral swash plate variable structure, with high-precision manufacturing for core friction pairs such as plunger, cylinder block and valve plate. The internal matching clearance is strictly controlled to ensure low friction and high wear resistance during long-hour operation. The optimized internal flow channel effectively reduces hydraulic oil circulation resistance and heat generation, improving oil supply efficiency and making the machine’s compound actions more coordinated and responsive. The pump body is integrally cast with high-strength ductile iron, featuring strong compression resistance, vibration resistance and impact resistance, adapting to harsh construction environments with heavy dust, mud splashes and frequent load switching. All core components undergo strict pressure resistance and fatigue tests, ensuring stable displacement and constant pressure output. It can effectively improve typical faults of old equipment such as weak digging force, slow traveling and high hydraulic temperature, restoring the original working performance of 20–25 ton excavators.

product parameters

Product Model: K3V112 Hydraulic Main Pump

Product Type: Swash Plate Variable Displacement Plunger Pump

Applicable Equipment: 20–25 Ton Medium and Large Excavators

Structural Features: Integral Cast Pump Body, High-Precision Friction Pair, Sensitive Variable Adjustment, Low Heat Generation, Strong Wear Resistance

Core Material: High-Strength Ductile Iron Shell + Wear-Resistant Alloy Core Parts

Working Performance: High Pressure Stability, Fast Response, Low Temperature Rise, Strong Anti-Fatigue

Core Functions: Provide High-Power Hydraulic Output, Support Full-Load Compound Actions, Improve Heavy-Duty Construction Efficiency

Applicable Scenarios: Quarry Loading, Foundation Excavation, Earthwork Backfilling, River Dredging, Large Municipal Construction

Matching Parts: Excavator Main Control Valve, Hydraulic Pipeline, Pilot Pump, Gear Pump Assembly

advantages

Large Displacement & Strong Heavy-Load Power: With 112ml/r large displacement design, the K3V112 main pump provides sufficient hydraulic flow and high-pressure output. It perfectly solves the problem of insufficient power of small-displacement pumps during deep excavation and stone loading, ensuring strong and steady digging performance under full-load working conditions.
Precise Variable Adjustment & Smooth Action Coordination: Adopting mature swash plate variable technology, the pump automatically adjusts flow and pressure according to load changes. The transition from light load to heavy load is smooth without stuttering, effectively improving uncoordinated boom, arm and bucket linkage of aging equipment.
Low Heat Generation & Durable Continuous Operation: The optimized internal flow structure reduces hydraulic energy loss and heat accumulation. Even after long hours of non-stop heavy-duty operation, the oil temperature rises slowly, avoiding power reduction or shutdown failure caused by hydraulic overheating protection.
High Wear Resistance & Stable Pressure Holding: Core friction pairs are made of high wear-resistant alloy materials with precision grinding process. The internal wear rate is extremely low, effectively preventing pressure drop and hydraulic drifting caused by internal leakage, maintaining long-term stable system pressure.
Rigid Pump Body & Strong Environmental Adaptability: The integral ductile iron pump body has excellent compression and vibration resistance. It can adapt to complex and harsh working conditions such as quarry impact, muddy water erosion and long-term vibration, without deformation or oil leakage.

FAQ

Q1: What tonnage of excavators does K3V112 hydraulic pump apply to?
A: The K3V112 hydraulic main pump is specially developed for 20–25 ton medium and large excavators. It is a universal mainstream high-displacement pump model in the market, widely compatible with most 20-ton class mainstream equipment for heavy-duty earthwork and quarry projects.
Q2: What faults indicate that the K3V112 main pump needs to be replaced?
A: If the excavator suffers from insufficient digging power, slow full machine action, weak traveling, frequent hydraulic pressure drop, high oil temperature during heavy load, and unsmooth compound linkage, it means the internal wear of the original main pump is serious and the pressure holding function fails, requiring timely replacement.
Q3: Is it necessary to modify the machine when replacing the K3V112 pump?
A: No modification is needed. This K3V112 pump is manufactured strictly according to original factory standards, with identical hole positions and interface dimensions. It supports plug-and-play direct installation, which is convenient for on-site maintenance.
Q4: What is the difference between K3V112 and small-displacement pumps such as K3V63?
A: K3V112 has larger displacement, higher pressure output and stronger heavy-load resistance, suitable for 20–25 ton heavy-duty excavators. Small-displacement pumps such as K3V63 are only applicable to 12–15 ton light and medium-duty equipment and cannot meet the power demand of large-tonnage heavy-load operation.
Q5: How to maintain the K3V112 main pump to prolong its service life?
A: Regularly replace qualified hydraulic oil and filter elements to keep the oil circuit clean. Avoid long-term full-load overload operation. Regularly check oil circuit leakage and blockage. Standard daily maintenance can effectively delay pump core wear and aging.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.