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: | |
|---|---|
3810020B29D
Dongfeng
| Attribute | Specification |
|---|---|
| Product Name | Electronic Oil Pressure Sensor / Oil Pressure Sending Unit |
| Manufacturer | OEM for FAW; commonly supplied by HanSheng, Zhengchang, or other Tier 1 Chinese sensor suppliers |
| Primary Part Number | 3810020B29D, 3810020-29D, 3810020A29D |
| Signal Type | Variable resistance or analog voltage output (depending on gauge/ECU protocol) |
| Operating Principle | Converts mechanical oil pressure into electrical signal via strain gauge or resistive element |
| Electrical System | 24V DC (standard for heavy trucks in China) |
| Housing Material | Reinforced engineering plastic and corrosion-resistant metal body |
| Sealing Method | Integrated copper or rubber sealing washer/gasket |
| Application Class | Medium- to Heavy-Duty Diesel Engines – Commercial Trucks & Buses |
⚠️ Improper handling or installation can result in false readings, permanent damage, or safety risks.
Avoid Hot Plugging/Unplugging (No Live Connection!)
❗ Always disconnect vehicle battery before removing or installing the sensor.
Connecting or disconnecting while powered may cause voltage spikes that destroy internal electronics.
Inspect Sealing Gasket Before Installation
Oil leaks
Air ingress into circuitry
Erratic signals
Ensure the copper or rubber seal is new and undamaged.
Reusing old seals can lead to:
Correct Thread Engagement
Stripped threads
Cracked sensor housing
Thread seizure or breakage inside oil passage (extremely difficult to repair)
Use proper wrench or socket to tighten evenly.
❌ Do not over-tighten — risk of:
Recommended torque: Hand-tight plus 1/4 to 1/2 turn with small wrench
Check Electrical Connector Condition
Clean pins from oil, dirt, or moisture buildup.
Verify secure locking mechanism engages properly.
Apply dielectric grease if exposed to wet environments.
Diagnose Intermittent Failures Properly
Internal resistor wear
Poor ground connection
Damaged wiring harness
Gauge fluctuating wildly (“needle jumping”)
Zero reading despite normal engine sound and oil level
If symptoms include:
Likely causes:
Replace sensor only after ruling out wiring faults.
Verify After Replacement
Oil pressure rise within seconds
Normal gauge behavior across RPM range
No warning lights remain active
Start engine and monitor:
Use multimeter or diagnostic tool to validate signal line integrity if needed.
Use Correct Tools During Service
Swivel-head ratchet
Short extension socket
Due to tight space near filter base or block side, use:
Avoid applying force to the plastic connector housing.
| Attribute | Specification |
|---|---|
| Product Name | Electronic Oil Pressure Sensor / Oil Pressure Sending Unit |
| Manufacturer | OEM for FAW; commonly supplied by HanSheng, Zhengchang, or other Tier 1 Chinese sensor suppliers |
| Primary Part Number | 3810020B29D, 3810020-29D, 3810020A29D |
| Signal Type | Variable resistance or analog voltage output (depending on gauge/ECU protocol) |
| Operating Principle | Converts mechanical oil pressure into electrical signal via strain gauge or resistive element |
| Electrical System | 24V DC (standard for heavy trucks in China) |
| Housing Material | Reinforced engineering plastic and corrosion-resistant metal body |
| Sealing Method | Integrated copper or rubber sealing washer/gasket |
| Application Class | Medium- to Heavy-Duty Diesel Engines – Commercial Trucks & Buses |
⚠️ Improper handling or installation can result in false readings, permanent damage, or safety risks.
Avoid Hot Plugging/Unplugging (No Live Connection!)
❗ Always disconnect vehicle battery before removing or installing the sensor.
Connecting or disconnecting while powered may cause voltage spikes that destroy internal electronics.
Inspect Sealing Gasket Before Installation
Oil leaks
Air ingress into circuitry
Erratic signals
Ensure the copper or rubber seal is new and undamaged.
Reusing old seals can lead to:
Correct Thread Engagement
Stripped threads
Cracked sensor housing
Thread seizure or breakage inside oil passage (extremely difficult to repair)
Use proper wrench or socket to tighten evenly.
❌ Do not over-tighten — risk of:
Recommended torque: Hand-tight plus 1/4 to 1/2 turn with small wrench
Check Electrical Connector Condition
Clean pins from oil, dirt, or moisture buildup.
Verify secure locking mechanism engages properly.
Apply dielectric grease if exposed to wet environments.
Diagnose Intermittent Failures Properly
Internal resistor wear
Poor ground connection
Damaged wiring harness
Gauge fluctuating wildly (“needle jumping”)
Zero reading despite normal engine sound and oil level
If symptoms include:
Likely causes:
Replace sensor only after ruling out wiring faults.
Verify After Replacement
Oil pressure rise within seconds
Normal gauge behavior across RPM range
No warning lights remain active
Start engine and monitor:
Use multimeter or diagnostic tool to validate signal line integrity if needed.
Use Correct Tools During Service
Swivel-head ratchet
Short extension socket
Due to tight space near filter base or block side, use:
Avoid applying force to the plastic connector housing.
