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: | |
|---|---|
WG9925550807
Sinotruk HOWO
| Attribute | Specification |
|---|---|
| Part Name | Time Delay Electronic Directional Valve / Dual Fuel Tank Switching Valve / Oil Circuit Solenoid Valve |
| OEM Part Number | WG9925550807 |
| Voltage Rating | 24V DC (standard for Chinese commercial vehicles) |
| Control Type | Electromagnetic solenoid actuated with integrated time-delay circuit |
| Function | Automatically switches return/fuel feed lines between main and auxiliary fuel tanks with smooth transition |
| Delay Feature | Built-in electronic timer (~3–5 seconds typical) to prevent fuel pressure shock or vapor lock |
| Valve Body Material | Corrosion-resistant die-cast aluminum alloy or reinforced metal composite |
| Housing Material | High-strength engineering plastic with IP67 sealing |
| Sealing Components | NBR or FKM (Viton) O-rings resistant to diesel, moisture, and aging |
| Connection Type | Push-to-connect (quick-fit) fittings or threaded ports (M12/M14) |
| Fluid Medium | Diesel fuel (ULSD), compatible with -20°C to -50°C winter grades |
| Protection Level | IP67 – Dust-tight and protected against temporary immersion (up to 1m for 30 minutes) |
| Operating Temperature Range | -40°C to +85°C |
| Weight | Approx. 0.4 kg – 0.6 kg |
| Quality Standard | 100% tested for electrical continuity, pressure integrity, and response timing at factory |
Name1
Name2
Due to its role in engine fuel continuity, precise installation is required.
Power Off: Disconnect battery negative terminal before beginning work.
Depressurize System: Relieve fuel line pressure if recently running.
Inspect Mounting Area: Clean and dry location on chassis beam near fuel tanks.
Verify Port Markings: Identify inlet/outlet directions — typically labeled:
IN: From fuel pump / engine return
OUT1 / OUT2: To Main Tank / Auxiliary Tank
Mount the valve securely using original brackets (avoid vibration stress).
Connect fuel lines correctly:
Use proper quick-connect or compression fittings
Ensure no kinks or bends in hoses
Double-check that inlet and outlets are not reversed
Plug in the 6-pin or 4-pin electrical connector firmly — ensure locking tab engages.
Reconnect battery and turn ignition ON (engine off).
❗ Critical Step – Perform Manual Air Bleeding After Replacement
Since air enters the lines during replacement:
Locate the manual hand primer pump on the fuel filter housing.
Pump repeatedly until firm resistance is felt and no bubbles appear in transparent section.
Attempt startup only after full fuel flow is confirmed.
Test both main and auxiliary tank modes via dashboard switch.
✅ Confirm smooth transition without engine hesitation or stalling.
| Attribute | Specification |
|---|---|
| Part Name | Time Delay Electronic Directional Valve / Dual Fuel Tank Switching Valve / Oil Circuit Solenoid Valve |
| OEM Part Number | WG9925550807 |
| Voltage Rating | 24V DC (standard for Chinese commercial vehicles) |
| Control Type | Electromagnetic solenoid actuated with integrated time-delay circuit |
| Function | Automatically switches return/fuel feed lines between main and auxiliary fuel tanks with smooth transition |
| Delay Feature | Built-in electronic timer (~3–5 seconds typical) to prevent fuel pressure shock or vapor lock |
| Valve Body Material | Corrosion-resistant die-cast aluminum alloy or reinforced metal composite |
| Housing Material | High-strength engineering plastic with IP67 sealing |
| Sealing Components | NBR or FKM (Viton) O-rings resistant to diesel, moisture, and aging |
| Connection Type | Push-to-connect (quick-fit) fittings or threaded ports (M12/M14) |
| Fluid Medium | Diesel fuel (ULSD), compatible with -20°C to -50°C winter grades |
| Protection Level | IP67 – Dust-tight and protected against temporary immersion (up to 1m for 30 minutes) |
| Operating Temperature Range | -40°C to +85°C |
| Weight | Approx. 0.4 kg – 0.6 kg |
| Quality Standard | 100% tested for electrical continuity, pressure integrity, and response timing at factory |
Name1
Name2
Due to its role in engine fuel continuity, precise installation is required.
Power Off: Disconnect battery negative terminal before beginning work.
Depressurize System: Relieve fuel line pressure if recently running.
Inspect Mounting Area: Clean and dry location on chassis beam near fuel tanks.
Verify Port Markings: Identify inlet/outlet directions — typically labeled:
IN: From fuel pump / engine return
OUT1 / OUT2: To Main Tank / Auxiliary Tank
Mount the valve securely using original brackets (avoid vibration stress).
Connect fuel lines correctly:
Use proper quick-connect or compression fittings
Ensure no kinks or bends in hoses
Double-check that inlet and outlets are not reversed
Plug in the 6-pin or 4-pin electrical connector firmly — ensure locking tab engages.
Reconnect battery and turn ignition ON (engine off).
❗ Critical Step – Perform Manual Air Bleeding After Replacement
Since air enters the lines during replacement:
Locate the manual hand primer pump on the fuel filter housing.
Pump repeatedly until firm resistance is felt and no bubbles appear in transparent section.
Attempt startup only after full fuel flow is confirmed.
Test both main and auxiliary tank modes via dashboard switch.
✅ Confirm smooth transition without engine hesitation or stalling.
