All the locks I have ever seen look like this... This uses the infamous CH751 key... You might try the same key in another basem*nt door lock to see if the key has a problem... Unless changed out its possible all keys are the same...
If this is what you are referring to then you have to get access behind them and remove the large nut.
Perhaps you can open the other side of the pass thru compartment and craw over to this door that is locked...
Also some 5th wheels mine included has a small dirty clotks drop from the bedroom hallway cabinet floor that a small person can craw down into the basem*nt area. You may have to look at this as well to gain entrance behind the lock to remove the big nut...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS
