Processing Machinery
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POM fuel system
Problem Phenomenon
POM fuel pump parts show strength decrease after long-term contact with gasoline
Cause Analysis
Additives in fuel act on POM for a long time; although the oil resistance is good, specific fuel formulations are erosive; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Select fuel-resistant dedicated grades; verify by fuel immersion aging test; pay attention to fuel formulation changes; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Fuel system parts require dedicated grades plus medium aging verification; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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