Re: [Amel Yacht Owners] Mainsail outhaul gearbox

Mike Ondra


Thank you for the offer. Email is mdondra at Verizon dot net.

Also Walter already uploaded to Yahoo the Leroy Sumer technical data and
drawings. Perhaps yours are different?



Rock Hall, MD

From: amelyachtowners@...
Sent: Monday, June 06, 2016 12:57 PM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] Mainsail outhaul gearbox


Please send me your email and I will send you a drawing of the gearbox.

I removed the shaft by removing the boom, turning it upside down on the deck
supported by wood dunnage,

And then installing a long socket head cap screw-grade 10 and then driving
it out with a large sledge hammer. I use an anti-seize compound on it twice
a year now.

Fair Winds


Kimberlite Amel Super Maramu #376

From: amelyachtowners@...
Sent: Monday, June 06, 2016 7:33 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] Mainsail outhaul gearbox

I know others have had difficulty extracting from the gearbox the shaft that
drives the gypsy, an operation that often requires some significant force.
After neglecting to lubricate that shaft for a year or two (maybe more) I
had the same problem. Tensioning a halyard to the top of the shaft and some
aggressive upward pounding with a sledge hammer succeeded in breaking the
top plate of the gearbox. While this facilitated partial disassembly of the
gearbox in place, we are left with the core of the gearbox and the gear
still in place and frozen to the shaft which remains through the boom.

Proposed next steps:

1) Remove the large gear from the core. It was not obvious to me how
that gear is splined to the core. Can that gear be extracted downward with a
gear puller?

2) After removing the gear, my thought is to expand the core by heat
which hopefully will then allow the shaft to be extracted.

Thoughts and suggestions? This is the Leroy Somer MVA M33C gearbox.

Suggestion to others, remove and grease the mainsail outhaul shaft at least
once a year.

Mike Ondra


Rock Hall, MD

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