Luders 33 Mast Sheaves
The mast sheaves (unit) for halyards on a Luders 33 vary in design, but the ones on my CROW – Hull #10 – look like the following. I’ve inserted photos (1) as installed and (2) as removed - for the record.
After removing the “unit” from the boat (3 Aluminum plates, 2 sheaves and 6 plastic “washers”) my seizing issue was clearly evident. Primary causes (3):
Rope halyard oversized!
1. The sheaves comfortably carry either the original wire halyard or a rope halyard no larger than 3/8” – which is capable of an approx. 4,900lb. load.
2. What was installed was a 7/16” line, half-way between the two lines depicted - that was overkill and didn’t fit the sheaves.
a. Sheaves created a gouve in the aluminum plates.
b. The spreading of the sheaves or lateral pressure from the halyard(s) has caused them to bite into the aluminum (visually & physically obvious) that results in binding.
The halyard issue was casually mentioned during a conversation I had with someone from the yard where the boat had been kept. He mentioned two (2) things he would “fix” first on the boat. I’ve partially fixed one and the other is next.
Flag Staff & fasteners
1. The staff appears to have been added when the Sheave unit was in.... The screws were too long and pressed against the outer aluminum piece potentially adding to the binding issue.
1. They were thin and made of plastic - and too small for the task.
How to Fix
Head Corner "Bracket"
The Luders 33 has a deck stepped mast - something I've experienced before on my Nor'sea 27, but this arrangement was slightly different and obviously older. In this design the mast compression post was the centerline wall of the head - a very substantial plywood panel approximately 2" in thickness (the fastening screws are 1 3/4" long).
Below the floor are wood "beams" that sit on the hull. I have not yet fully assessed it's integrity but it looks good - did find an old mouse nest too.
The aft wall of the head is somewhat thinner and serves to help hold the main supporting wall in place and connects to the port side of the boat. To hold the two parts together is the "Bracket."
I've shown the old - UGLY - Bracket that has seen better days and I think a lot of pee (maybe shower water too), as you might guess from the lower portion - which was probably never cleaned....
It was still sound, but not fitting my intentions for the boat. When installed it will join two freshly painted and cleaned walls.
The paint used was actually Rustoleum.... I plan on using the same for the mast and boom when I get to them in the spring.
Cockpit Teak Floor
The cockpit of the boat had a substantial two piece floor over what had been a re-awlgripped surface.
a. Both aft corner drains (total of 4) were blocked and trapped debris resulted in partially plugged drain hoses and grit degrading the nonskid awlgripped surface.
b. Rear floor around the tiller was removed (stored) and cockpit floor cleaned – including drains (flushed).
SOOO Much better now!
Placeholder - ALL the original plumbing, holding tank and toilet were removed! BOTH thru hulls will be removed and glassed over).
REPLACEMENT - AIRHEAD Composting Toilet!