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Decompose pictures
| Reference Number | Part Name | Description & Function |
|---|---|---|
| 1 | Sensor Body (Iron Housing) | High-strength iron/steel main housing with precision-machined threaded port. Provides robust mounting and protects internal sensing elements. |
| 2 | Pressure Sensing Element | Piezoresistive or thin-film strain gauge transducer sealed inside the body. Converts hydraulic/oil/air pressure into a proportional electrical signal. |
| 3 | Rubber O-Ring / Sealing Gasket | Oil-resistant Viton/Nitrile rubber seal integrated into the mounting face. Ensures a leak-proof seal between the sensor and the engine/manifold port. |
| 4 | Electrical Connector Socket | Industry-standard 3-pin or 4-pin sealed connector interface. Receives the mating wiring harness plug for signal and power transmission. |
| 5 | Terminal Pins | Gold or tin-plated brass conductor pins inside the connector socket. Provide low-resistance electrical contact for signal output, ground, and reference voltage. |
| 6 | Internal Signal Conditioning Circuit | Miniature electronic PCB sealed within the housing. Amplifies and temperature-compensates the raw transducer signal to deliver a precise 0.5–4.5V or similar linear output. |
| 7 | Mounting Thread Hex | Machined hex shoulder on the sensor body. Allows for secure tightening into the engine block, fuel rail, or hydraulic manifold using a standard wrench. |
| 8 | Wire Strain Relief (Integral) | Rubber boot or rigid potting at the connector end. Prevents wire flex fatigue and moisture ingress at the electrical termination point. |
Parts list
| Item | OEM Reference No. | COGENG Part No. | Description | Qty |
|---|---|---|---|---|
| 1 | 20824479 | CG-20824479 | Volvo Pressure Sensor — Complete Assembly (Iron Body, Rubber Seal, with Connector) | 1 |
| 2 | 20476992 | CG-20476992 | Volvo Pressure Sensor — Alternative OEM Cross-Reference | 1 |
| 3 | 64MT475M | CG-64MT475M | Volvo Pressure Sensor — Alternative OEM Cross-Reference | 1 |
| 4 | 20449988 | CG-20449988 | Volvo Pressure Sensor — Alternative OEM Cross-Reference | 1 |
| 5 | 22443498 | CG-22443498 | Volvo Pressure Sensor — Alternative OEM Cross-Reference | 1 |
| 6 | — | CG-SEAL-VPS | Replacement Rubber O-Ring / Sealing Gasket Kit for Volvo Pressure Sensors | 1 Set |
| 7 | — | CG-CONN-VPS-3P | Replacement 3-Pin Wiring Harness Connector Plug with Terminals | 1 (Optional) |
| Parameter | Specification |
|---|---|
| Product Name | VOLVO Pressure Sensor |
| COGENG Part Numbers | 20824479, 20476992, 64MT475M, 20449988, 22443498 |
| OEM Equivalent | Volvo 20824479, 20476992, 64MT475M, 20449988, 22443498 |
| Product Type | Engine & Hydraulic Pressure Sensors |
| Sensor Type | Piezoresistive pressure transducer |
| Output Type | 4-20 mA / 0.5-4.5V / Frequency (application dependent) |
| Application | Fuel rail pressure, engine oil pressure, boost pressure, hydraulic pressure |
| Compatible Engines | Volvo D11, D13, D16 |
| Material | Iron + Rubber (seals: NBR / FKM) |
| Packing | PP bag inside, carton box outside |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Supply Capacity | 500 PCS (each) |
| COGENG Part | OEM Equivalent | Interchange |
|---|---|---|
| 20824479 | Volvo 20824479 | 20824480, 20824481, 21023758 |
| 20476992 | Volvo 20476992 | 20476993, 20476994, 20508510 |
| 64MT475M | Volvo 64MT475M | 64MT476M, 64MT477M, 20798016 |
| 20449988 | Volvo 20449988 | 20449989, 20449990, 20508512 |
| 22443498 | Volvo 22443498 | 22443499, 22443500, 20508511 |
| Parameter | Specification |
|---|---|
| Displacement | 10.8L (659 cu in) |
| Cylinders | 6 in-line |
| Bore x Stroke | 123mm x 152mm |
| Fuel System | Common rail (high pressure) |
| Power Range | 250-350 kW (335-470 HP) |
| Applications | Construction equipment, trucks |
| Parameter | Specification |
|---|---|
| Displacement | 12.8L (781 cu in) |
| Cylinders | 6 in-line |
| Bore x Stroke | 131mm x 158mm |
| Fuel System | Common rail (high pressure) |
| Power Range | 300-500 kW (402-670 HP) |
| Applications | Construction equipment, trucks, haulers |
| Parameter | Specification |
|---|---|
| Displacement | 16.1L (983 cu in) |
| Cylinders | 6 in-line |
| Bore x Stroke | 144mm x 165mm |
| Fuel System | Common rail (high pressure) |
| Power Range | 400-600 kW (536-805 HP) |
| Applications | Large excavators, haulers, wheel loaders |
| Parameter | Specification |
|---|---|
| Supply Voltage | 8-36V DC (Volvo 24V system compatible) |
| Protection Rating | IP65 / IP67 (connector mated) |
| Operating Temperature | -40°C to +105°C (-40°F to +221°F) |
| Storage Temperature | -40°C to +125°C (-40°F to +257°F) |
| Vibration Resistance | 15G @ 50-2000Hz |
| Shock Resistance | 50G |
| Accuracy | ±1.0% to ±2.0% of full scale |
| Response Time | < 5 ms |
| Parameter | Specification |
|---|---|
| Pressure Range | 0 - 2,000 bar (0 - 29,000 psi) |
| Output Signal | 0.5-4.5V analog (ratiometric) |
| Measurement Type | Absolute pressure |
| Connector Type | 3-pin specialized |
| Mounting Thread | M12 × 1.5 |
| Hex Size | 19 mm (3/4") |
| Housing Material | High-strength steel |
| Function | Common rail fuel pressure monitoring |
| Effect of Failure | Engine derate, hard starting, poor performance |
| Parameter | Specification |
|---|---|
| Pressure Range | 0 - 350 bar (0 - 5,075 psi) |
| Output Signal | 4-20 mA (current loop) |
| Measurement Type | Gauge pressure |
| Connector Type | 3-pin Deutsch DT |
| Mounting Thread | 7/16-20 UNF |
| Hex Size | 22 mm (7/8") |
| Housing Material | Stainless steel |
| Function | Hydraulic system, brake circuit, implement pressure |
| Effect of Failure | Reduced hydraulic power, machine derate |
| Parameter | Specification |
|---|---|
| Pressure Range | 0 - 10 bar (0 - 145 psi) |
| Output Signal | 0.5-4.5V analog |
| Measurement Type | Gauge pressure |
| Connector Type | 3-pin AMP / Deutsch |
| Mounting Thread | 1/8"-27 NPT or M10×1 |
| Hex Size | 19 mm (3/4") |
| Housing Material | Brass / Zinc-plated steel |
| Function | Engine oil pressure monitoring |
| Effect of Failure | False low pressure warnings, engine derate |
| Parameter | Specification |
|---|---|
| Pressure Range | 0 - 50 bar (0 - 725 psi) |
| Output Signal | 4-20 mA (current loop) |
| Measurement Type | Gauge pressure |
| Connector Type | 3-pin Deutsch DT |
| Mounting Thread | 7/16-20 UNF |
| Hex Size | 19 mm (3/4") |
| Housing Material | Stainless steel |
| Function | Hydraulic pilot circuit pressure |
| Effect of Failure | No pilot pressure, machine dead, no hydraulic function |
| Parameter | Specification |
|---|---|
| Pressure Range | 0 - 4 bar (0 - 58 psi) absolute |
| Output Signal | 0.5-4.5V analog |
| Measurement Type | Absolute pressure |
| Connector Type | 3-pin Deutsch |
| Mounting Thread | 1/8"-27 NPT |
| Hex Size | 19 mm (3/4") |
| Housing Material | Engineering plastic / Brass |
| Function | Turbo boost pressure monitoring |
| Effect of Failure | Low power, black smoke, poor fuel economy |
Q: What Volvo and Mack models use the 20824479 and 64MT475M pressure sensor?
A: The COGENG pressure sensor is a direct OEM replacement for Volvo part number 20824479 and Mack part number 64MT475M, designed for various Volvo and Mack truck models where these sensor part numbers are specified. Common applications include engine oil pressure, fuel pressure, air system pressure, or other critical pressure monitoring circuits. Always verify the part number against your vehicle's parts manual or the original sensor's identification markings to confirm exact compatibility before ordering.
Q: What are the symptoms of a failing pressure sensor on a Volvo or Mack truck?
A: Common symptoms include inaccurate or erratic pressure readings on the instrument panel or diagnostic display, false warning lights or alarms, active diagnostic trouble codes related to the pressure sensor circuit, the engine control system entering a derate or limp mode, or failure of the automatic engine protection system to activate during actual low pressure conditions. A faulty pressure sensor can lead to unnecessary downtime or, in worst cases, catastrophic engine damage if genuine low pressure conditions go undetected.
Q: How does this pressure sensor affect engine and vehicle operation?
A: The sensor continuously monitors pressure and transmits real-time data to the engine ECU and vehicle control systems. This information is used for engine management, emissions control, and operator warnings. Accurate pressure sensing is essential for proper engine operation, fuel efficiency, and protection against component damage.
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