Cummins — Removal (for G Series only)

For these Cummins models: G-1710, G-495, G-743, G-855, GTA-1710, GTA-743, GTA-855.

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Procedure

1. 1. Shut off the main gas supply valve,
2. 2. Remove air intake piping from the carburetor.
3. 3. Remove gas supply line fromm the pressure reduction
4. 4. Remove throttle linkage from the carburetor.
5. 5. Remove clamps securing the pressure reduction valve
6. 6. Remove capscrews and washers securing the
7. 7. Separate the carburetor and pressure reduction valve;
8. 1. Remove gaskets and pipe sealing compound from all
9. 2. Apply sealing compound and install pipe fittings in
10. 3. Position the carburetor with new gasket on the intake
11. 4. Secure the pressure reduction valve to the mounting
12. 5. Connect throttle linkage and air intake piping to the
13. 1. Close the main gas supply valve.
14. 2. Set the carburetor power mixture adjustment valve at
15. 3. Close the idle adjustment; then open two and one-half ©
16. 4. Remove the pipe plug and attach a pressure gauge
17. 5. Remove the pipe plug from teh intake manifold and -
18. 6. Open the main line gas supply valve.
19. 7. Adjust the line gas pressure to the “Thermac” pressure
20. 8. Start the engine, using normal starting procedure.

Source: manual:CUMMINS G495 G743 G855 GTA743A GTA743B GTA855 G1710 GTA1710 Operation and Maintenance Manual (2).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.