John Deere — Service Natural Gas Regulator
Maintenance · Fuel system
From a John Deere service manual — check it applies to your exact model before use.
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Before you start
- Natural gas is highly flammable. Shut off gas supply and relieve pressure before servicing.
Procedure
- Shut off natural gas supply and relieve internal regulator gas pressure.
- Unscrew union nut, be careful not to lose split rings.
- Disconnect balance tube from fitting.
- Remove four lower cap screws and remove regulator from support plate.
- Inspect and replace seat ring in union body if necessary.
- Remove cotter pin and replace disc holder assembly.
- Remove closing cap and turn adjusting screw counterclockwise until all spring compression is removed.
- Remove remaining cap screws and separate spring case from diaphragm case.
- Remove diaphragm assembly.
- Install new diaphragm assembly and tighten cap screw to 5 N·m (4 lb-ft).
- Install spring case and control spring.
- Tighten cap screws and hex nuts to 8 N·m (6 lb-ft) using a crisscross pattern.
- Install closing cap using a new gasket.
- Adjust regulator to desired outlet pressure setting.
Specs & values
- Pusher post cap screw 5 N·m (4 lb-ft)
- Spring case-to-diaphragm case 8 N·m (6 lb-ft)
- Seat ring 47 N·m (35 lb-ft)
Source: John Deere service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.