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Archive 2017 · 300 2.8 tripod collar seized up... ideas?

  
 
clay23
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p.1 #1 · p.1 #1 · 300 2.8 tripod collar seized up... ideas?


The tripod collar on my 300 2.8 afs v1 finally seized up today. I had noticed about a week ago it was starting to get caught up when rotating the body and it has finally bit the dust.

My question: Is it possible to lube this thing up? How about taking the tripod collar off entirely? I couldn't find much information about the older af-s version of this lens so maybe someone here has had a similar problem?

I'm comfortable with trying to do a basic repair myself if possible.



Apr 24, 2017 at 07:36 PM
trenchmonkey
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p.1 #2 · p.1 #2 · 300 2.8 tripod collar seized up... ideas?


I'd try WD-40. Stand on end (front element down) and make a dam out of a towel/cloth
underneath collar. Apply, let set a bit and try to rotate collar. Rinse/repeat 'til it frees up.
Wipe, let dry then apply a silicone dry lube...should be good to go.



Apr 25, 2017 at 08:00 AM
clay23
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p.1 #3 · p.1 #3 · 300 2.8 tripod collar seized up... ideas?


trenchmonkey wrote:
I'd try WD-40. Stand on end (front element down) and make a dam out of a towel/cloth
underneath collar. Apply, let set a bit and try to rotate collar. Rinse/repeat 'til it frees up.
Wipe, let dry then apply a silicone dry lube...should be good to go.


Thanks. I bought a copy of the service manual also so if it is not to complicated to remove the collar I will give that a try.

It is a little scary spraying WD into the collar but I would guess that it is sealed.



Apr 25, 2017 at 12:49 PM
trenchmonkey
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p.1 #4 · p.1 #4 · 300 2.8 tripod collar seized up... ideas?


Nah, metal on metal...no seams. Go for it Did my vintage 1988
AF 300 f2.8 ED N last year, works like new now. Woot!



Apr 25, 2017 at 02:36 PM
Photozack81
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p.1 #5 · p.1 #5 · 300 2.8 tripod collar seized up... ideas?


My 400 2.8 isn't exactly seized but it sure doesn't rotate smoothly.

WD40 I have, silicone dry lube may be a bit hard to come by around here.



Apr 25, 2017 at 02:39 PM
Pyrat
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p.1 #6 · p.1 #6 · 300 2.8 tripod collar seized up... ideas?


Photozack 81 - Try a marine store - boat owners use that stuff all the time on their blocks, and it works wonders. This one might work:

Broadwater Marine
Ground Floor, HK Sun Plaza
Roxas Boulevard, Pasay City
Philippines

Tel: +63 2 551-1813
Mob: +63 918 963-8148
Email: [email protected]



Apr 25, 2017 at 09:53 PM
kaplah
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p.1 #7 · p.1 #7 · 300 2.8 tripod collar seized up... ideas?


trenchmonkey wrote:
I'd try WD-40. Stand on end (front element down) and make a dam out of a towel/cloth
underneath collar. Apply, let set a bit and try to rotate collar. Rinse/repeat 'til it frees up.
Wipe, let dry then apply a silicone dry lube...should be good to go.


The issue with WD-40 is that it dries, leaving a gummy residue, which requires more application of WD-40, etc. It's not really a lubricant, although it obviously does work in that role.

Break-Free CLP is the same stuff the US and Canadian military uses for cleaning and lubing and preserving guns. It's the best general-purpose lubricant I've used, and does very well in multi-lubricant tests. It's a migrating lubricant, so generally a drop or two or three, along with some time, will work its way into a mechanism. It doesn't dry, works well at high and low temperatures, etc.

Can be had anywhere, but here's a common source: https://www.walmart.com/ip/Break-Free-CLP-2/45744734 - the squeeze bottle has a slightly-thicker version than the spray can, and is more controllable.




Apr 26, 2017 at 07:49 AM





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