1. **Core Specifications**
- **Model**: AP2D36 (OEM-manufactured by KYB Japan, commonly used in Cat small/medium excavators).
- **Type**: Swash plate axial piston variable displacement pump.
- **Displacement**: 36 cm³/rev (ml/rev).
- **Operating Pressure**:
- Rated pressure: ~34.3 MPa (350 bar);
- Peak pressure: Up to 39.2 MPa (400 bar).
- **Compatible Models**: Designed for Caterpillar 307C; partially compatible with 306E, 308C, and other 7-8 ton-class machines.
2. **Function & Compatibility**
- **Primary Hydraulic Power Source**: Delivers high-pressure hydraulic oil for travel, swing, and boom/arm/bucket cylinders.
- **Dual-Pump Design**: The 307C typically uses a **tandem pump setup** (e.g., AP2D36 + AP2D18). The main pump (36ml) drives high-load operations, while the auxiliary pump supports pilot systems/composite actions.
- **Matching Requirements**: Directly interfaces with the 307C’s hydraulic circuit. Verify compatibility with the machine’s serial number (S/N) due to potential minor variations across production years.
3. Product Overview
TheAP2D36 hydraulic pumpis a high-performance axial piston pump specifically designed for use in theCaterpillar 307C compact excavator. As a critical component of the machine's hydraulic system, it ensures reliable and efficient power transmission for various operations, including digging, lifting, and maneuvering.
4. Key Specifications
• Model: AP2D36
• Type: Axial Piston Pump (Variable Displacement)
• Flow Rate:
• Nominal: Up to36 cc/rev(cubic centimeters per revolution)
• Adjustable based on system requirements.
• Pressure Rating:
• Maximum operating pressure:Up to 280 bar (4,060 psi)
• Suitable for high-pressure hydraulic systems.
• Rotation Direction: Bi-directional (clockwise/counterclockwise)
• Mounting Type: Flange-mounted for easy integration.
• Port Sizes: Standard SAE or DIN connections (specific to Cat 307C requirements).
5. Compatibility
• Primary Application: Caterpillar 307C Mini Excavator
• Replaces OEM part numbers (if applicable) or serves as a direct upgrade.
• Other Compatible Models:
• May fit other Cat compact equipment or similar machines from other brands (verify specifications).
6. Features & Benefits
• High Efficiency:
• Optimized swashplate design minimizes internal leakage, improving volumetric efficiency.
• Reduces energy consumption and heat generation.
• Durability:
• Constructed with high-strength materials (e.g., hardened steel pistons, cast iron housing).
• Resistant to wear, corrosion, and contamination.
• Compact Design:
• Space-saving footprint ideal for compact machinery like the Cat 307C.
• Variable Displacement:
• Adjusts flow rate based on load demand, enhancing fuel efficiency and performance.
• Easy Maintenance:
• Modular construction allows for quick replacement of wear parts (e.g., seals, bearings).
7. Technical Support & Warranty
• OEM or Aftermarket Options:
• Available as genuine Caterpillar parts or high-quality aftermarket alternatives.
• Warranty:
• Typically 6–12 months (varies by supplier).
• Technical Assistance:
• Suppliers often provide installation guides, troubleshooting support, and replacement part sourcing.
8. Common Issues & Solutions
• Low Pressure/Flow:
• Check for worn pistons, damaged seals, or clogged filters.
• Noise/Vibration:
• Inspect for misalignment, air in the system, or worn bearings.
• Leakage:
• Replace damaged O-rings or shaft seals.
9. Replacement & Upgrades
• OEM Part Number: (Refer to Cat parts catalog for exact reference.)
• Aftermarket Alternatives:
• Brands like Bosch Rexroth, Kawasaki, or Eaton may offer compatible pumps.
• Performance Upgrades:
• High-pressure variants or pumps with advanced control features (e.g., load-sensing).
