Fuel Pressure - Gas System
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| Parameter | Value |
| Fuel Supply Pressure | |
| Fuel Pressure to Control Valve | |
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| (1) | The recommended supply pressure range is 30-35 psig. |
Use this procedure to check the regulated fuel pressure. Make sure that the fuel supply pressure is correct.
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| Required Tools | |
| Qty | Part Number |
| 1 | 1U-5470 Engine Pressure Gp |
| 1 | 8T-5160 Gas Regulator Setting Tool |
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| |
| Illustration 1 | g01192577 |
|
1U-5470 Engine Pressure Group (1) Pressure indicators (2) Zero adjustment screw (3) Pressure indicator (4) Pressure tap (5) Pressure indicator | |
This tool group has an indicator that is used to read the pressure in the fuel lines. The Special Instruction, SEHS8907 is with the tool group.
Test Preparation - Fuel Pressure to Control Valve
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| NOTICE |
|---|
|
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component. |
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| |
| Illustration 2 | g03379422 |
|
(6) Gas Shutoff Valve (GSOV)
(7) Gas pressure sensor (8) Gas line (9) Fuel control valve | |
- Turn off the main gas valve.
- De-energize the GSOV.
- Slowly remove gas pressure sensor (7) from gas line (8).
- Install a fitting into gas line (8). Connect the 1U-5470 Engine Pressure Gp to the fitting. Refer to Illustration 1.
Test Procedure - Fuel Pressure to Control Valve
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| NOTICE |
|---|
|
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component. |
- Open the main gas valve.
- Energize the GSOV.
- Check the engine gas pressure to the fuel control valve. If, the pressure is not
10.3 to 24.1 kPa (1.5 to 3.5 psig) refer to Adjustment Procedure - Fuel Pressure to Fuel Control Valve.
Adjustment Procedure - Fuel Pressure to Fuel Control Valve
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| Illustration 3 | g03333365 |
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(10) Bolt
(11) Cover | |
- Remove cover (11), and install the correct tools, from the 8T-5160 Gas Regulator Setting Tool, for pressure setting adjustment.
- Adjust bolt (10) to achieve desired fuel pressure to the fuel control valve.
- After desired pressure is reached, install cap (11).
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