Prior to 1995 many of the Catalina Sailboats 27' to 42' had a very same Companionway Hatch. Very common is the horrible screech you get when you slide the hatch open. Originally Catalina put a Teflon type tape in the channel but after a few years the tape loses its adhesive and falls apart. The factory solution is disassemble the entire hatch and replace the tape, a nasty big job.
So...
Many years back Graham Mackay posted a solution to a screeching companionway hatch sliding against the cabin top on the Catalina 36 forum. I followed his instructions to the letter and it solved my problem. You need to source some 1/16" thick HDPE plastic and cut into strips 1" wide x 72" long. You slide them in the channel a Viola no more screech. It works on most Catalina boats made prior to 1995. Feel free to contact me to ask questions how this simple process works.
So...
Many years back Graham Mackay posted a solution to a screeching companionway hatch sliding against the cabin top on the Catalina 36 forum. I followed his instructions to the letter and it solved my problem. You need to source some 1/16" thick HDPE plastic and cut into strips 1" wide x 72" long. You slide them in the channel a Viola no more screech. It works on most Catalina boats made prior to 1995. Feel free to contact me to ask questions how this simple process works.