Q. Why Scavenge Inspection Is Done And What Are The Things Should Be Checked During Inspection?
Ans. Scavenge Inspection Is The One Of The Most Efficient Method Used Onboard To Determine Engine's Running Condition. It Provides Us All The Useful Information Like Condition Of Cylinder Liner, Piston, Rings, Piston Rod, Skirt Etc. At Almost Zero Expense.
Things Should Be Checked During Scavenge Inspection.
1. Keep Cooling Oil And Cooling Water Circulation On And Check For Any Leakage.
2. Inspect The Scavenge Air Box And Ports For Any Sludge Accumulation And Ensure Scavenge Drains Are Clear. To Reduce The Risk Of Scavenge Fire, Remove Any Sludge And Carbon Deposits In The Scavenge Box.
3. Inspect The Condition Of Piston, Piston Rings, Liner, Piston Rod And Skirt. It Should Be Visually Examined Through Scavenge Air Ports. Check Piston Crown For Burning Marks And Deposits. Check Skirt For Scuffing Marks And Abrasion. In Good Running Conditions, The Running Surfaces Of The Piston Rings And Cylinder Liner Will Be Worn Bright. Rings Should Move Freely In The Grooves And Should Be Well Oiled. Press The Piston Rings Inside The Groove And If It Pushes Back Then Its Intactness Is Confirmed.
4. Check All Non Return Valves/flap Valves In The Scavenge Air Box For Their Easy Movement And Possible Damage.
5. Inspect All Mountings On The Scavenge Box. Scavenge Relief Valve Should Be Examined And Should Be Cleaned. Temperature Probe Should Be Inspected And All Deposits Should Be Removed.
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