Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
10-30-2017, 01:53 PM   #1
Senior Member

Join Date: Aug 2012
Posts: 102
Type of oil for lubricating mirror gears?

Hi all,

I recently purchased an aesthetically mint Asahi Pentax S3 from eBay.

The 1st roll I put through had absolutely zero problems.

Halfway through the 2nd roll my mirror would get stuck in the "raised" position at 1/30 and 1/60 speeds.

I would have to shoot another exposure to bring the mirror back down.

However after that roll, I tried to test the shutter at various speeds without film and now the mirror is permanently in the up position (with a blacked out viewfinder).

I found another post by a user on this forum recommending removing the 4 screws on the bottom plate and lubricating various gear components with oil.

Anybody have any idea what sort of Oil I should use that I could get from a local store?

I've heard Nyoil tossed around but I live in Vancouver, Canada and the price on amazon Canada ranges from $50 to $90 per 4oz 0.oo

If there is anything more mainstream that I could find in a local store that would be similarly effective I would be willing to try it

10-30-2017, 02:45 PM   #2

Join Date: Jul 2009
Location: London
Posts: 1,034
Sure the mirror isn't stuck in the up position because it's sticking to the foam that absorbs the mirror impact? The foam gets sticky over time as it degrades. Which isn't to say that your lubrication suggestion is wrong of course.
10-30-2017, 03:00 PM   #3
Senior Member

Join Date: Aug 2012
Posts: 102
Original Poster
Fair Point John.

Unfortunately right now I can't even unmount my lens to check because this lens has a little metal pin sticking out at the back. I feel it impacting something when i try to untwist (most likely the raised mirror?)

The oil/lubrication method seems relatively easy to try (as long as I can find the right oil)
10-30-2017, 03:43 PM   #4
Senior Member

Join Date: Jan 2014
Posts: 151
The yellow one..moebius oil | eBay

10-30-2017, 06:23 PM   #5
Senior Member

Join Date: Aug 2012
Posts: 102
Original Poster

I used some Hoppe's Lubricating Oil (Gun Oil) from Canadian tire and used a pinhead to apply miniscule dabs around the suggested gear areas and so far no issues.

Will continue testing for a day with no film but it seems to work okay right now

Thank you all
10-30-2017, 08:16 PM   #6
Site Supporter
Site Supporter
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 10,300
QuoteOriginally posted by dcshooter Quote
Lube the bearing surface only and don't douse everything, since it can migrate to other parts of the camera.
Like the sensor cover glass. Nikon learned that the hard way.
10-31-2017, 04:29 AM   #7

Join Date: Jul 2009
Location: London
Posts: 1,034
😁 Good result.

02-11-2018, 02:38 PM   #8
Junior Member

Join Date: Feb 2018
Photos: Albums
Posts: 47
Liberty synthetic oil works well for my Spotmatic.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
canada, mirror, oil, position, roll, speeds, store, type of oil
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
K1000 curtain tension adjustment gears sticking out Tuomu Pentax Film SLR Discussion 18 06-22-2018 09:44 AM
Help a newbie buying stuff - opinion on future gears Sasha Pentax SLR Lens Discussion 31 08-29-2016 03:50 AM
Fotodiox lens adapters -Type 1 vs.Type 2 ? RickS Pentax Q 5 09-02-2014 12:11 AM
lubricating Takumar F/1.4 50mm peated Pentax SLR Lens Discussion 4 10-27-2011 09:28 PM
Oil Crisis? What Oil Crises? benjikan General Talk 41 07-22-2008 06:30 AM

All times are GMT -7. The time now is 07:14 PM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]