John Deere — Air Purge Valve Removal and Installation
A John Deere service procedure — check it applies to your exact model before use.
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Procedure
- Install elbow (D) and diagnostic port fitting (E) if removed.
- Tighten diagnostic fitting to specifications (24 N•m or 18 lb-ft).
- Install cap (C).
Specs & torque values
- Air Purge Valve Diagnostic Port Fitting—Torque: 24 N•m (18 lb-ft)
Source: manual: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.