vivitar(komine) 135mm f2.8 assembly(need help)

[peaceluv]

I recently got vivitar 135mm f2.8 (Komine) from ebay.
The aperture blade is oily and it needs to be cleaned.
It seem it is only accessible from front element but I could not disaasemble front element(w/ built-in Hood).
anybody has experience to open this lens from front?
any advice will be appreciated.

[beachboy2]

Have you tried a friction tool to undo the front name ring. It looks like it screws off. Good luck.
bb2

[peaceluv]

Thank you, beachboy2 and subfanatic, for your help.
I was able to remove name plate and front element.. but still have a problem with inner element. I could not open or unscrew (w/ wrench) the inner component to access to aperture blade assembly like subfanatic mentioned above.
I think I have to wrap up this project and move on to next one. Thank you again for your kind input.

[luisalegria]

I often run into this problem.

A suggestion for stuck rings (name rings and etc.) if the rubber tools dont work -

1 - Drill two small holes in opposite sides of the ring with a finger drill or pin vise. There are several types of these -

http://www.micromark.com/FINGER-DRILLS-66-72-SET-OF-4,7284.html

http://www.widgetsupply.com/page/WS/CTGY/pin-vise-jeweler

These can drill small holes quickly in aluminum.

2 - Now you have two holes you can insert sharp pointed objects into, like the points of a compass, or if you have lens spanner that takes sharp bits, like this -

http://www.amazon.com/gp/product/B002QI1CVA/ref=pd_lpo_k2_dp_sr_1?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B000HRD0K8&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0WKNNWFBFS5YHASA6KNC

or this -

http://www.amazon.com/gp/product/B002QI4Q90/ref=pd_lpo_k2_dp_sr_3?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B000HRD0K8&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0WKNNWFBFS5YHASA6KNC

This will give you a much stronger grip than a rubber tool, albeit there is a high risk of scratching the name ring or even the lens, so its certainly a method that must be used only when all else has failed.

In addition, I suggest using a light penetrating oil like WD40 in the thread before starting; best to leave it to soak into the thread for a day or so.