Clean out cover removal

[ImperialCC]

Any suggestions on how to remove the black cover on the waste tank?

 

[FredC]

pin spanner wrench, deck plate key, wood and a rubber mallet


you can also drive two lag bolts into a piece of 2x4

 

[Nomad74]

Screwdriver

 

[The Great Oz]

Thumb and forefinger in the holes, twist anti-clockwise and the inner plate unscrews.