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Removing old mast wires, and mast cap question
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Hay All
This is a bit of a 2 part question I have my Mast down, so was checking the wiring, and found the mast had been rewired (YAAAaaaa). But the old wires where still in the mast just cut about 6" in (BOOoooo), and they are in there good, wont budge, wont pull out, and dont want to pull to hard for messing something else up. does anyone know how the original wires where attached, and how to take them lose? The second question is kind of related to the first, i also would like to run a new radio cable to the mast top and was wondering does the cap on the mast top come off? and if so How? Any help anyone may have would be greatly appreciated. |
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Hi,
I'm not sure how the original mast wires were attached inside the mast.? Presumably with a few rivets to secure them at a few points - just guessing here really.
I have looked pretty closely at the top of my mast and I am pretty sure that the cap or top can be taken off.? Expect some difficulty with this as you may have stainless screws in the aluminum mast - hence some corrosion.? There is also the small problem of the masthead sheaves (pulleys) for the halyards, which are located just below the mast cap and may be difficult to thread a wire around.? The spreaders may also offer some obstruction as well but could be removed temporarily.? I would use an electricians snake tool to thread your wire through the obstructions in there.
Good luck.
Caleb D
T27 #328
NY
-----Original Message-----
From: j c <anvil3a@...> To: [email protected] Sent: Tue, Jun 16, 2020 6:33 pm Subject: [T27Owners] Removing old mast wires, and mast cap question Hay All
This is a bit of a 2 part question I have my Mast down, so was checking the wiring, and found the mast had been rewired (YAAAaaaa). But the old wires where still in the mast just cut about 6" in (BOOoooo), and they are in there good, wont budge, wont pull out, and dont want to pull to hard for messing something else up. does anyone know how the original wires where attached, and how to take them lose? The second question is kind of related to the first, i also would like to run a new radio cable to the mast top and was wondering does the cap on the mast top come off? and if so How? Any help anyone may have would be greatly appreciated. |
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Weeeelllllllllll......Yeah, I¡¯ve done that. Yes, there will be corrosion. I used some sort of penetrating oil, I don¡¯t remember what, and lots of patience, but all the screws came out. I think I used an impact driver, but gingerly. Once I had them out I drilled them a size larger and re-tapped. Bigger screws have a bigger cross-section relative to their circumference, which is where the threads (and the corrosion) are; so bigger screws (machine screws) are probably less likely to shear off. So while it was out I rebuilt the sheave box. That was a hassle, because the aluminum side plates had holes that had worn oval, so the sheaves would bind, so I had to make new sideplates. Got new bushings for the sheaves, I think on Ebay. Found a way to chuck the old sheaves in my drill press and clean them up with emery cloth. But the end result was good-as-new. It¡¯s a LOT easier to run wires with the cap off. Can¡¯t speak to old wires, for mine had been renewed at one time. If you run a conduit (to keep things protected and QUIET at anchor) consider making it bigger than you think you need. Your wires will be pulled far more easily, and god-only-knows what the next electrical development will be, in terms of future ability to upgrade. Honestly, relative to the labor involved, the wire, even the good marine tinned stuff, is cheap, so you might consider going all new, considering that IF yours is original, it¡¯s no newer than what? 1979? What¡¯s it cost to pull the mast mid-season if an old wire goes wonky? FWIW. Warren Stein
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On Jun 16, 2020, at 6:33 PM, j c <anvil3a@...> wrote: |
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I rewired our mast a few years ago. It is a 27-2, so not sure if it is the same. The cap has some screws that go in from the side. Probably habe to be drilled out to get cap off. But you probably do not have to. I rewired mine with it on. I also replaced the two sheaves while it was down. With the sheaves out there was plenty of room. They use clevis pins as axles.? I think I used a snake to pull a messenger through, then pulled down the new harness with it. Zip ties were installed every 2-3 feet with tells left on in groups of three, so they can't slap inside, which was very annoying. There were two harnesses actually. One went all the way up, the other went to the bow light, foredeck light. There was a channel to house the wires, but it only went up the the bow light. The old wiring was not secured. Come to think of it, I may of used the old co-axial cable as the first messenger. Fred Liesegang Eagle #662
On Tuesday, June 16, 2020, 06:33:48 PM EDT, j c <anvil3a@...> wrote:
Hay All This is a bit of a 2 part question I have my Mast down, so was checking the wiring, and found the mast had been rewired (YAAAaaaa). But the old wires where still in the mast just cut about 6" in (BOOoooo), and they are in there good, wont budge, wont pull out, and dont want to pull to hard for messing something else up. does anyone know how the original wires where attached, and how to take them lose? The second question is kind of related to the first, i also would like to run a new radio cable to the mast top and was wondering does the cap on the mast top come off? and if so How? Any help anyone may have would be greatly appreciated. |
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I have not looked at my mast for last 5 years been in storage @ $75 per year. Plan on getting it out within the next few weeks . Plan in launching end of July . Will have plenty of pictures and questions coming up !
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On Jun 16, 2020, at 6:33 PM, j c <anvil3a@...> wrote: |
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A note on the masthead sheaves (pulleys):
When they made the T27 type 1's the trend was to use a wire/rope halyard which was part wire and a spliced on section of rope.? The wire sections went through the mast to the top and conncected to a bit of rope.? To accommodate this Tartan installed "V" shaped sheaves in the sheave box (to handle the wire section).? For all rope halyards it is advisable to either re-shape the sheaves as I think Warren Stein described or get new "U" shaped sheaves which are more accommodating for rope.? The "V" shaped sheaves can handle modern rope but expect some chafing of the rope's outer cover in the places it goes through the sheave under pressure.? I think I used to replace my halyards about every 10 years as by then the cover was shot from chafing.? It is not a bad idea to inspect your sheave box if your mast is down to see what condition the original sheaves are in, as they can be abraded by the wire rope and have sharp edges showing if they are badly worn, which will chafe your rope halyard quickly.
Modern ropes like dyneema have made the wire/rope halyard mostly obsolete for boats around 27'.? Even Stay-Set-X did not exist when our boats were made.
As you were.
Caleb D
T27 #328
ny
?
-----Original Message-----
From: fred4936 via groups.io <fred4936@...> To: [email protected] Sent: Tue, Jun 16, 2020 8:12 pm Subject: Re: [T27Owners] Removing old mast wires, and mast cap question I rewired our mast a few years ago. It is a 27-2, so not sure if it is the same. The cap has some screws that go in from the side. Probably habe to be drilled out to get cap off. But you probably do not have to. I rewired mine with it on. I also replaced the two sheaves while it was down. With the sheaves out there was plenty of room. They use clevis pins as axles.? I think I used a snake to pull a messenger through, then pulled down the new harness with it. Zip ties were installed every 2-3 feet with tells left on in groups of three, so they can't slap inside, which was very annoying. There were two harnesses actually. One went all the way up, the other went to the bow light, foredeck light. There was a channel to house the wires, but it only went up the the bow light. The old wiring was not secured. Come to think of it, I may of used the old co-axial cable as the first messenger.
Fred Liesegang
Eagle #662
On Tuesday, June 16, 2020, 06:33:48 PM EDT, j c <anvil3a@...> wrote:
Hay All
This is a bit of a 2 part question I have my Mast down, so was checking the wiring, and found the mast had been rewired (YAAAaaaa). But the old wires where still in the mast just cut about 6" in (BOOoooo), and they are in there good, wont budge, wont pull out, and dont want to pull to hard for messing something else up. does anyone know how the original wires where attached, and how to take them lose? The second question is kind of related to the first, i also would like to run a new radio cable to the mast top and was wondering does the cap on the mast top come off? and if so How? Any help anyone may have would be greatly appreciated. |
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