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SANY Four-Circuit Air Processing Unit 152599000394A
Highly Integrated Modular Design
Traditional commercial vehicle pneumatic systems typically require separate components-such as an air dryer cartridge, pressure regulator, and four-circuit protection valve-connected by a complex array of air lines. In contrast, this product is an industry-leading, all-in-one integrated Air Processing Unit (APU) that seamlessly combines four core components within a compact alloy valve body:
1. High-efficiency air dryer (featuring a spin-on cartridge for particulate and oil/water separation).
2. System pressure regulator (controlling automatic compressor unloading and loading).
3. Four-circuit protection valve (providing independent air supply to multiple circuits and secondary protection against air loss).
4. Electronically controlled anti-freeze heating system (preventing the exhaust valve from freezing or seizing in extreme cold).
Three Core Functions
1. Thorough Water and Oil Removal: Features a built-in, high-efficiency desiccant cartridge that ensures an air system dew point of -40°C, preventing freezing in winter.
2. Precise Pressure Regulation: Controls the loading and unloading of the air compressor.
3. Four-Circuit Air Loss Protection: Automatically isolates a specific circuit (such as the rear axle brake or transmission air line) in the event of a rupture or leak, prioritizing air pressure for the front axle brake reservoir.
Common Faults and Their Impact on the Transmission
1. Slow air brake response in heavy-duty vehicles during winter.
2. Corrosion of downstream air valves: Compressed air containing oil and moisture washes away the internal lubricant from the Fast "Double-H" valve and air line connectors, accelerating air line cracking and leakage or causing air cross-leakage within the Double-H valve.
SANY Truck Air Supply Control System Repair & Replacement BOM List
| No. | Part Number / Code | Official Part Name (Standard) | Common Description / Function | Suggested Qty | Component Attribute |
|---|---|---|---|---|---|
| 1 | 152599000394A | Air Processing Unit Assembly (APU) | Air Dryer Integrated Valve Assembly (Core Part) · The exact item you queried, including the 4-circuit protection valve, pressure regulator, 24V heater, and spin-on dryer cartridge. |
1 Set | Core Replacement (Mandatory) |
| 2 | 132199000038A (Varies slightly by batch) |
Air Compressor Wire-Braided High-Pressure Hose | Air Compressor Discharge Line / Metal Braided Pipe · Connects the compressor to the APU. Subject to intense heat and carbonization; clogging leads to slow charging or constant purging. |
1 Pcs | Highly Recommended |
| 3 | SANY Dedicated Part / Universal | Air Reservoir Manual/Automatic Drain Valve | Air Tank Drain Valve · Installed at the bottom of air tanks. Crucial to drain and purge all accumulated water/oil sludge from the tanks when replacing the APU. |
1 Set | Highly Recommended |
| 4 | SANY Original Harness | Electric Heater Connector & Wire Harness | 24V Heater Plug Connection · Reconnects the APU freeze-protection heater. Must check for melting or corrosion; failure in winter causes the exhaust valve to freeze up. |
1 Pcs | Inspect & Replace if Needed |
| 5 | VOSS / Standard Fittings | Push-In Quick Fittings & O-Ring Seals | Air Pipe Connectors / Seal Rings · Old seals distort after disassembly. New O-rings are required to prevent micro-air leaks at the APU multi-port inlet/outlet interfaces. |
1 Set | Mandatory Pair (Replace with APU) |
| 6 | 666258-3 | Auxiliary Box Double-Valve Air Pipe Assembly | FAST Gearbox Range Shift Air Line · (Cross-System Check) If the old dryer passed oil, this downstream nylon line is likely contaminated/cracked. Check or replace together. |
1 Set | Downstream Linked Inspection |
DETAILS
| DESCRIPTION | Four-Circuit Air Processing Unit | PART NUMBER | 152599000394A |
| WEIGHT | 5kg | VOLUME | 320 mm × 250 mm × 240 mm |
| TRUCK MOLDE | SANY | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | CHASSIS |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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