ENGINE 44 vii. Pre-Filter Cartridge Replacement : 1. Hold the bottom of pre-filter with one hand & Remove the 4 screw. 2. Lift the cover on the projection with flat screw driver. NOTE Ensure that screw driver is not causing any damage to internal parts. 3. Lift the cover assembly with the help of two ports from the bowl& remove the assembly. 4. Remove the used pre-filter cartridge assembly & “O – ring” from the cover assembly.
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