Kawasaki K5V22DPHHydraulic PumpSpare Parts Guide
1. Core Function of the Kawasaki K5V22DPH Hydraulic Pump
The Kawasaki K5V22DPH is a high-performanceaxial piston pumpdesigned for heavy-duty applications in excavators (e.g., Kobelco SK460/480/495, Sany SY485/550). It converts mechanical energy into hydraulic power, driving boom, arm, swing, and travel functions with a rated pressure of350 barand peak pressure up to400 bar. Its bent-axis design ensures high efficiency (>95%) and durability under extreme conditions.
2. Key Components of the K5V22DPH Hydraulic Piston Pump
The pump’s reliability hinges on criticalhydraulic piston pumpcomponents:
• Piston Assembly: High-precision wear-resistant pistons that reciprocate to generate flow.
• Swashplate: Controls piston stroke length via angle adjustment, enabling variable displacement.
• Port Plate: Separates high/low-pressure chambers; must maintain flatness to prevent internal leakage.
• Bearings: Cylindrical/tapered roller bearings support high radial/axial loads, ensuring smooth rotation.
• Seals: Fluororubber O-rings and shaft seals prevent oil leakage under high pressure/temperature.
3. Integration with Hydraulic System
The K5V22DPH operates within anopen-circuit hydraulic system, collaborating with:
• Charge Pump: Supplies low-pressure oil to compensate for system leakage.
• Control Valves: Regulate flow direction and pressure (e.g., main relief valves, directional control valves).
• Cooler: Dissipates heat to maintain optimal oil temperature (50–70°C).
Critical Compatibility Note:
The pump’s displacement (212 cc/rev) must match system requirements. Mismatched displacement can cause overheating (excess flow) or sluggish operation (insufficient flow).
4. Essential Hydraulic Pump Spare Parts for K5V22DPH
【表格】
Spare Part Function Recommendation
Piston Assembly Core flow-generating component Replace every 4,000 operating hours or if wear exceeds 0.05mm.
Swashplate Controls displacement adjustment Inspect for hard chrome plating peeling; replace if surface roughness > Ra 0.2.
Port Plate Prevents internal leakage Check flatness with a dial indicator; replace if deviation > 0.01mm.
Bearings Supports shaft rotation Use high-load-capacity bearings (e.g., SKF/NSK); replace if noise or vibration occurs.
Seals Maintains pressure integrity Select fluororubber (FKM) seals for temperatures up to 200°C and pressures ≤ 400 bar.
5. Sourcing & Maintenance Recommendations
• OEM vs. Aftermarket:
• OEM Parts: Supplied by Kawasaki or authorized dealers (e.g., Jinan Focor Machinery). Ensure full compatibility but at a higher cost.
• Aftermarket Alternatives: Opt for ISO 9001-certified manufacturers (e.g., Chinese suppliers with Rexroth-equivalent tech). Verify material certificates (e.g., piston hardness HRC 58–62).
• Maintenance Schedule:
• Daily: Check oil cleanliness (NAS 9 or lower) and seal leakage.
• Every 2,000 Hours: Replace hydraulic oil and filters.
• Every 4,000 Hours: Disassemble and inspect pistons/swashplates for wear.
6. Technical Specifications (K5V22DPH)
【表格】
Parameter Value
Displacement 212 cc/rev
Rated Pressure 350 bar
Peak Pressure 400 bar
Speed Range 600–2,200 rpm
Volumetric Efficiency ≥95%
Weight ~85 kg
Summary
For Kawasaki K5V22DPHhydraulic pumpmaintenance, prioritize OEM or certified aftermarket spare parts (e.g., pistons, swashplates, seals) to ensure compatibility and reliability. Adhere to a strict maintenance schedule to prevent unplanned downtime, and source components from suppliers with proven track records in heavy machinery applications.
Kawasaki K5V22DPH Hydraulic Pump Spare Parts (English Version with Embedded Keywords)
The Kawasaki K5V22DPH is a swashplate Hydraulic piston pump (axial piston variable displacement pump), typically configured as a tandem parallel pump widely used in the hydraulic system of medium-sized excavators and construction machinery. To maintain complete machine hydraulic performance, we provide a full range of high-quality Hydraulic Pump Spare Parts, ensuring your core hydraulic pump delivers stable output.
1. Core Rotating Group
This is the power heart of every Hydraulic piston pump, directly determining the volumetric efficiency and digging breakout force of the entire hydraulic system.
· Cylinder Block & Piston/Slipper Assembly: As the core unit of the hydraulic pump that generates high-pressure oil, its fitting precision directly affects pressure build-up and flow output within the hydraulic system.
· Valve Plate: Wear will cause internal leakage in the hydraulic system, resulting in weak digging and speed loss. This is a critical Hydraulic Pump Spare Parts item to inspect when servicing this hydraulic pump.
2. Regulator & Control
The precise regulation mechanism enables this Hydraulic piston pump to respond to load changes, achieving constant power and load-sensing control for the hydraulic system.
· Regulator: Receives hydraulic system pressure feedback and adjusts the swash plate angle of the hydraulic pump in real time, optimizing power matching between the engine and the hydraulic system.
· Servo Piston & Feedback Linkage: Sticking can directly cause abnormal displacement of the Hydraulic piston pump, compromising the controllability and coordination of the hydraulic system.
3. Seal Kits
Core Hydraulic Pump Spare Parts for protecting the cleanliness of the hydraulic system and preventing external leaks.
· Shaft Seal: Isolates the hydraulic pump from the flywheel housing, preventing hydraulic oil migration and maintaining stable oil volume in the hydraulic system.
· Housing Gasket / O-ring Set: Prevents contaminants from entering the Hydraulic piston pump interior, extending the reliable service life of the hydraulic pump.
4. Drive & Support Parts
· Drive Shaft & Coupling Splines: The first link in power input; wear causes abnormal noise in the hydraulic pump and impacts the smoothness of the entire hydraulic system.
· Swash Plate Bearings & Slippers: Support the variable mechanism; failure leads to severe internal scuffing of the Hydraulic piston pump.
Applicable Equipment & Selection Tips
· Applicable Models: Commonly found in the hydraulic system of medium excavators like Komatsu PC200-8, Hitachi ZX200-3, and Sumitomo SH200, as well as the hydraulic pump assemblies of some road machinery.
· Selection Reminder: When ordering Hydraulic Pump Spare Parts, always provide the complete part number and serial number from the hydraulic pump nameplate. Thoroughly clean the hydraulic system and replace filters during parts replacement to significantly extend the service life of the Hydraulic piston pump.
