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why does the moses mast screw always loosen itself ?

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Foil
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why does the moses mast screw always loosen itself ?

Postby Foil » Sat Apr 27, 2019 11:26 am

OK, this has been going on now for 2 years,
exactly the same on all my previous carbon moses masts, and I have had a few-
one 70cm, two 91cm, three 101cm masts.
every session the front screw that tightens together the fuse and mast works loose,
Any fuse, the pointy one with countersunk screws, the 2018 blunt end fuse, and the bigger 633 surf fuse, (both cap head, allen key type)

I tighten both screws correctly even to the point of hearing that dry crack sound at times, tried flat washers, and spring washers, but just like magic the front screw is loose each and every time I break down after a session, one hour or 5 hours makes no difference, it works loose, the rearmost screw never does, but the front one i can remove with 2 fingers on the little moses key, the rear one needs a good full hand grip to loosen it up.
dry clean screws, or marine grease on threads makes no difference.
I know others suffer the same problem, but is this only on the Moses carbon masts, :?: :?: :?: :?: :?: :?: :?: :?: :?: :roll:

tomtom
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Re: why does the moses mast screw always loosen itself ?

Postby tomtom » Sat Apr 27, 2019 11:42 am

same here - but i just dont care :) Fuse always sits tight even with screw loose. Needs to tap it out when disassemble.

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jkrug
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Re: why does the moses mast screw always loosen itself ?

Postby jkrug » Sat Apr 27, 2019 11:53 am

my LF masts have same issue, but it happens on both of them, not just front. vibration does it. it's not like the fuselage is going to come off, but it can be wobbly when i check it after a session. and a while back i tightened it so hard (on my original learning setup) that it seized up on me and that rig is now permanently bound together. so be careful...i'd rather have it get loose than get frozen.

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Re: why does the moses mast screw always loosen itself ?

Postby evan » Sat Apr 27, 2019 12:05 pm

When riding, the mast-head is pressed harder into the fuse than you can tighten it with the bolts. If you don't want loose bolts just re-tighten them after your initial riding, they should remain tight after that.

I only disassemble my foil for inspection and only have loose bolts after the first session I put the foil back together. After that first ride they are more likely to seize up than come loose.
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Foil
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Style: improving foiler.
Gear: Moses T38 full carbon Ltd edition (number 3)
2019 Groove Skates, 120 + 130 both full naked carbon with gold stripes
101cm Moses Carbon mast
71+90cm Slingshot masts with moses adaptor
Moses- 633 wing set
Moses - 683s wing set
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Re: why does the moses mast screw always loosen itself ?

Postby Foil » Sat Apr 27, 2019 5:28 pm

thanks for that.
I will do just that tomorrow, its easy to carry a bolt key on me whilst sailing so will give that a try, if it works then wooohooo,Hallelujah.
if not then more thinking required.

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Re: why does the moses mast screw always loosen itself ?

Postby peterbjarke » Sat Apr 27, 2019 10:52 pm

I had the same problem with a Ketos foil attached to an Alpine board. This setup has only one bolt though. I used to carry an Allan key and tighten during a session. What I do now instead is so wriggle the foil rather hard before a session and then re-tighten the bolt. Then it stays tight during the session.

Best regards,

Peter

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Re: why does the moses mast screw always loosen itself ?

Postby Macster » Sun Apr 28, 2019 8:36 am

Apply heaps of the tefgel. They wont come loose.

Foil
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Style: improving foiler.
Gear: Moses T38 full carbon Ltd edition (number 3)
2019 Groove Skates, 120 + 130 both full naked carbon with gold stripes
101cm Moses Carbon mast
71+90cm Slingshot masts with moses adaptor
Moses- 633 wing set
Moses - 683s wing set
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Re: why does the moses mast screw always loosen itself ?

Postby Foil » Sun Apr 28, 2019 9:22 am

Macster wrote:
Sun Apr 28, 2019 8:36 am
Apply heaps of the tefgel. They wont come loose.
makes no difference at all :roll:
locktight red would, but then I would need a van to travel to the water :lol:

Foil
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Posts: 660
Joined: Mon Oct 23, 2017 7:44 pm
Kiting since: 2001
Local Beach: Newbrighton near Liverpool
Favorite Beaches: Flag beach for the Foil, Rhosneigr for the Foil and twintip.
Style: improving foiler.
Gear: Moses T38 full carbon Ltd edition (number 3)
2019 Groove Skates, 120 + 130 both full naked carbon with gold stripes
101cm Moses Carbon mast
71+90cm Slingshot masts with moses adaptor
Moses- 633 wing set
Moses - 683s wing set
Ozone V4 Reo 6/7/8/9
Ozone Alpha V1 10/12
Nobile 50/50 twin tip
North 2018 click bars with Q power lines
massive grin
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Re: why does the moses mast screw always loosen itself ?

Postby Foil » Sun Apr 28, 2019 6:33 pm

evan wrote:
Sat Apr 27, 2019 12:05 pm
When riding, the mast-head is pressed harder into the fuse than you can tighten it with the bolts. If you don't want loose bolts just re-tighten them after your initial riding, they should remain tight after that.

I only disassemble my foil for inspection and only have loose bolts after the first session I put the foil back together. After that first ride they are more likely to seize up than come loose.
Did that today, it was not as loose after my shortish session of 2hrs, but it still came loose, finger tight,
I think a 4 hr session would have it really loose as normal.

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Re: why does the moses mast screw always loosen itself ?

Postby ap888 » Mon Apr 29, 2019 12:22 am

Blue/medium lock tight as soon as got it..lock tight on and in...haven't took out since.. can also add little paint marks so can just do a visual check when ever...that if u can fit into your vehicle mast and fuse together everyone should be able to with no wings on :thumb: if one puts enough lock tight on should be enough of a barrier to keep most of the metals from touching and seizing up...but am also never in salt so much less to worry someone could maybe shed light on lots of lock tight will it create enough of barrier to stop seizing?


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