Caterpillar 320B Parallel Pump A8VO107 Spare Parts
This analysis covers thehydraulic pumpA8VO107’s role as a core component, technical traits of thehydraulic piston pump, compatibility with thehydraulic system, and selection guidelines forHydraulic Pump Spare Partsin Caterpillar 320B excavators.
1. Core Role of the A8VO107 Hydraulic Pump
The A8VO107 is aRexroth-designed axial-piston variable-displacement pumptailored for Caterpillar 320B excavators. As ahydraulic piston pump, it converts mechanical energy into hydraulic power to drive the excavator’s boom, arm, swing, and travel functions. Featuring abent-axis design, it enables stepless flow adjustment via swashplate angle modulation, with a rated pressure of350 barand a peak pressure of400 bar, ensuring reliability under heavy-duty conditions.
2. Technical Traits of the Hydraulic Piston Pump
• High Efficiency:Dual axial conical piston groups reduce mechanical friction, achievingvolumetric efficiency >95%and minimizing energy loss.
• Stability:The bent-axis structure enhances rigidity, enabling resistance to shock loads in complex operating environments.
• Variable Control:External signals (e.g., pressure/flow feedback) adjust the swashplate angle, aligning pump output with system demands to prevent energy waste.
3. Hydraulic System Compatibility
The Caterpillar 320B employs anopen-circuit hydraulic system, where the A8VO107 acts as the primary pump. Key collaborative components include:
• Charge Pump: Supplies low-pressure oil to compensate for system leakage, maintaining suction port pressure stability.
• Control Valve Block: Regulates system pressure and oil flow direction via main relief valves and directional control valves.
• Cooler: Dissipates heat from hydraulic oil to prevent seal degradation or oil degradation due to overheating.
Compatibility Key Points:
The A8VO107’s displacement (107 cc/rev) must match system flow requirements to avoid overheating (excessive displacement) or sluggish operation (insufficient displacement).
4. Hydraulic Pump Spare Parts Selection Guidelines
Critical Spare Parts List
• Piston Assembly:High-precision wear-resistant material; inspect for wear during routine maintenance.
• Swashplate:Controls piston stroke; check for hard chrome plating peeling on sealing surfaces.
• Port Plate:Separates high/low-pressure chambers; ensure flatness to prevent internal leakage.
• Bearings:Support pump shaft rotation; use high-load-capacity types (e.g., cylindrical/tapered roller bearings).
• Seals:Include shaft seals and O-rings; select materials resistant to high pressure/temperature (e.g., fluororubber).
Spare Parts Sourcing Recommendations
• OEM Parts:Supplied by Rexroth or Caterpillar-authorized vendors, ensuring full compatibility but at higher costs.
• Aftermarket Alternatives:Choose manufacturers withISO 9001 certification. For example, some Chinese suppliers produce A8VO107 parts approved by Rexroth’s technical standards, offering cost-effectiveness without sacrificing quality.
Maintenance Schedule
• Daily Checks:Monitor oil cleanliness (NAS 9 or lower) and seal leakage every500 operating hours.
• Periodic Replacements:Change hydraulic oil and filters every2,000 hours; disassemble and inspect pistons/swashplates every4,000 hours.
Caterpillar 320B Parallel Pump A8VO107 Spare Parts (Version with Embedded Keywords)
The A8VO107 tandem pump installed on the Caterpillar 320B excavator is a swashplate Hydraulic piston pump (axial piston variable displacement pump) specifically designed for heavy-duty open hydraulic systems. Its dual parallel structure provides strong power for the boom, arm, and swing. To maintain the machine's hydraulic performance, we offer a full range of high-quality Hydraulic Pump Spare Parts, restoring this core hydraulic pump to factory condition.
1. Core Rotating Group
This is the power heart of every Hydraulic piston pump, directly determining the volumetric efficiency and operating speed 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 the machine's digging force.
· Valve Plate: Worn plates cause internal leakage in the hydraulic system, leading to pressure drops and slow movements. This is a critical Hydraulic Pump Spare Parts item to inspect when repairing this hydraulic pump.
2. Regulator & Control
Precise regulation is the key to enabling this Hydraulic piston pump to achieve energy savings and smooth combined operations:
· Regulator: Based on hydraulic system load feedback, it controls the swash plate angle of the hydraulic pump in real time, achieving power matching and flow distribution.
· Servo Piston: Drives the variable displacement mechanism; sticking can cause the Hydraulic piston pump displacement to run out of control, affecting the stability of the entire hydraulic system.
3. Seal Kits
Essential Hydraulic Pump Spare Parts for maintaining the cleanliness and leak-proof integrity of the hydraulic system:
· Shaft Seal: Prevents the hydraulic pump from leaking oil into the flywheel housing, keeping the hydraulic system oil volume stable.
· Housing Gasket / O-ring Set: Prevents external contaminants and air from entering the Hydraulic piston pump interior, extending the hydraulic pump's service life.
4. Drive & Support Parts
· Drive Shaft & Coupling: The bridge for input power; spline wear can cause abnormal noise, directly reducing the hydraulic pump's transmission efficiency.
· Swash Plate Bearings & Slippers: Support the variable displacement mechanism; failure will lead to catastrophic internal scuffing of the Hydraulic piston pump.
