Did the ' Canon Squeak'but now another fault--

[pentaxpete]

I managed to lube the mirror linkage 'squeak' on my 'gift' Canon A1 after several attempts, following a web-site instruction -- I used a piece of electrical 'Fuse-wire' with a small amount of 'Three-in-one' oil on the tip and touched it down into the correct place, and after several months it suddenly has stopped the 'squeak' BUT now I find the faster shutter speeds are slow and over-exposing -- it seems OK from 1/60 downwards. I have inspected both sides of the shutter blind and NO OIL had leaked -- anyone with any ideas please ?

 

[Tom1956]

Yes. You shouldn't have used 3 in 1 brand glue. Should have used something like a clock oil.

 

[shutterfinger]

3in1 is petroleum blend as is Water Dispersant 40 (same company) and both dry out and leave a sticky residue behind.
TriFlow http://www.triflowlubricants.com/Tri-Flow_Superior_Drip_Lubricant.html
Clock/watch oil
Gun oil
are good oils for cameras.
Use sparingly.

 

[John Koehrer]

Naptha or liquid lighter fluid both work.
The mirror governor uses resin gears mounted between the mirror housing and a metal plate.
Dunno why they squeak but they do.

 

[shutterfinger]

Naptha or liquid lighter fluid both work

and they both damage plastic and rubber.

 

[John Koehrer]

and they both damage plastic and rubber.

There's no rubber in there and the gears are likely nylon or another more durable synthetic, not plastic.

 

[pentaxpete]

Today doing some more experiments as the 1/1000 and 1/500th seem to have 'speeded up' again !

 

[pentaxpete]

Today doing some more experiments as the 1/1000 and 1/500th seem to have 'speeded up' again !

Well, I took some tests using 'TV' and shutter at 1/1000 and 1/500 and the density of the negatives matches so the fast speed must be OK again !