Bulk Packaging 5282085 Vacuum Pump for Foton Auman ETX CTX Aumark Heavy Duty And Light Trucks Series ISF 2.8/3.8 Engines Parts
I. Core Attributes
| Attribute | Specification |
| Formal Name | Engine-Driven Vacuum Pump Assembly (Brake Booster Assist Type) |
| Function | Generates vacuum for brake booster (primary), supports EGR valve operation (secondary) |
| Drive Mechanism | Camshaft-driven (positive displacement vane-type) – NOT belt-driven |
| Core Components | - Pump Body (Cast ADC12 aluminum alloy)
- Vanes (Sintered carbon composite)
- Integrated check valve (EPDM)
- Oil separator (PTFE membrane)
- Mounting flange (M10 x 1.5 threaded holes) |
| Operating Principle | Engine camshaft rotation → Eccentric rotor movement → Vacuum generation (60–80 kPa) |
| Critical Feature | Integrated check valve (prevents vacuum loss during engine-off coasting) |
II. Critical Technical Parameters
| Parameter | Value | Tolerance | Test Standard |
| Max Vacuum Output | 80 kPa (23.6 inHg) | ±5 kPa | SAE J1270 (Idle test) |
| Flow Rate | 120 L/min | ±15 L/min | ISO 1585 Annex C |
| Operating Temp Range | -40°C to +135°C | - | Cummins EOL Test Spec |
| Drive Speed Range | 600–4,200 rpm | - | Engine camshaft ratio 1:1 |
| Oil Consumption | ≤ 0.5 ml/h | - | ASTM D6751 |
| Service Life | 300,000 km (186,000 miles) | Under Euro 5 conditions | Cummins Fleet Data 2023 |
| Check Valve Cracking Pres. | 20 kPa (5.9 inHg) | ±3 kPa | ISO 6149-2 |
III. Valid Application
Verified Vehicle Models
| Manufacturer | Valid Models | Invalid Models |
| Foton | Ollin V, Ollin Vision V (Euro 5, chassis codes: BJ1049/BJ1069) | Euro 4 models (e.g., BJ1046) |
| Volkswagen | Novo Delivery (Euro 5, chassis codes: W0L/W0M only) | All Euro 4/6 VW models |
| Other | Foton Tunland pickup (Euro 5), Foton Auman light truck (Euro 5) | Any vehicle without EGR system |
IV. Performance Characteristics
| Feature | Technical Rationale |
| Brake Response Time | Achieves 80 kPa vacuum in ≤ 3 engine revolutions (critical for emergency stops) |
| EGR Support | Maintains 60–70 kPa vacuum for EGR valve actuation (prevents DPF clogging) |
| Oil Separation | PTFE membrane retains 99.5% of oil vapor (prevents brake fluid degradation) |
| Thermal Stability | Aluminum body dissipates heat; operates at 135°C coolant temp (vs. 110°C for 5270422) |
| Failure Mode | Vane wear → Vacuum loss → Brake pedal hardening (92% of field failures – Cummins FR-2022-114) |
