T: +8615609213525
E: 15829336298@139.com
E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
| Quantity: | |
|---|---|
9325000540
FAW
| Attribute | Description |
|---|---|
| Product Name | Air Processing Unit (APU) / Air Dryer with Quad-Circuit Protection Valve |
| Brand | WABCO (ZF) |
| OE Part Number | 9325000540 |
| Function | Dries, filters, regulates, and distributes compressed air in multi-circuit brake systems |
| Parameter | Specification |
|---|---|
| Operating Voltage | 24V DC (with electric heating function) |
| Max Working Pressure | 13.0 bar |
| Cut-Out Pressure | 9.3 bar (±0.2 bar) |
| Cut-In / Unload Pressure | 8.1 bar |
| Working Temperature Range | -40°C to +80°C |
Ensure vehicle electrical system is 24V negative ground — incorrect voltage damages the heating element.
The APU automatically purges moisture during compressor cut-out — listen for the brief exhaust sound after engine shutdown.
Monitor air system performance: if tanks require frequent manual draining, the APU may be failing.
Never adjust factory-set pressure screws — improper adjustment can lead to over-pressurization, risking burst lines or damaged brake chambers.
Do not bypass or disable the electric heater — this increases risk of ice blockage in cold weather, leading to brake failure.
Avoid using non-OEM or low-quality replacement cartridges — these may lack proper filtration media or structural strength.
Replace the drying cartridge every 80,000–120,000 km or annually:
More frequent replacement required in humid or high-mileage operations.
If water is found in air tanks, replace immediately.
Inspect electrical connector before winter:
Check for corrosion, loose pins, or broken wires at the base of the unit.
A failed heater causes freeze-related malfunctions even in moderate cold.
Check for leaks regularly:
Use soapy water to test all threaded ports and joints.
Even small leaks increase compressor cycling and reduce system efficiency.
Monitor compressor health:
Excessive oil in the air system ("oil carryover") indicates worn air compressor seals.
Oil contaminates the desiccant, causing it to clump and lose drying capacity.
If black oil residue appears in the spent cartridge, inspect and repair the compressor first.
Install upstream filters (if applicable):
Helps protect APU from particulates and liquid oil before entering the dryer.
| Attribute | Description |
|---|---|
| Product Name | Air Processing Unit (APU) / Air Dryer with Quad-Circuit Protection Valve |
| Brand | WABCO (ZF) |
| OE Part Number | 9325000540 |
| Function | Dries, filters, regulates, and distributes compressed air in multi-circuit brake systems |
| Parameter | Specification |
|---|---|
| Operating Voltage | 24V DC (with electric heating function) |
| Max Working Pressure | 13.0 bar |
| Cut-Out Pressure | 9.3 bar (±0.2 bar) |
| Cut-In / Unload Pressure | 8.1 bar |
| Working Temperature Range | -40°C to +80°C |
Ensure vehicle electrical system is 24V negative ground — incorrect voltage damages the heating element.
The APU automatically purges moisture during compressor cut-out — listen for the brief exhaust sound after engine shutdown.
Monitor air system performance: if tanks require frequent manual draining, the APU may be failing.
Never adjust factory-set pressure screws — improper adjustment can lead to over-pressurization, risking burst lines or damaged brake chambers.
Do not bypass or disable the electric heater — this increases risk of ice blockage in cold weather, leading to brake failure.
Avoid using non-OEM or low-quality replacement cartridges — these may lack proper filtration media or structural strength.
Replace the drying cartridge every 80,000–120,000 km or annually:
More frequent replacement required in humid or high-mileage operations.
If water is found in air tanks, replace immediately.
Inspect electrical connector before winter:
Check for corrosion, loose pins, or broken wires at the base of the unit.
A failed heater causes freeze-related malfunctions even in moderate cold.
Check for leaks regularly:
Use soapy water to test all threaded ports and joints.
Even small leaks increase compressor cycling and reduce system efficiency.
Monitor compressor health:
Excessive oil in the air system ("oil carryover") indicates worn air compressor seals.
Oil contaminates the desiccant, causing it to clump and lose drying capacity.
If black oil residue appears in the spent cartridge, inspect and repair the compressor first.
Install upstream filters (if applicable):
Helps protect APU from particulates and liquid oil before entering the dryer.
