John Deere — Install Air Purge Valve
A John Deere service procedure — check it applies to your exact model before use.
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Procedure
- Install air purge valve
- Tighten line (B) to specifications
- Install elbow (D) and diagnostic port fitting (E) if removed
Specs & torque values
- Fuel line torque: 24 N•m (18 lb-ft)
Source: manual:john deere ctm188.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.