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Nikon 35mm f/1.8G Focus Motor Replacement

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  1. Nikon 35mm f/1.8G Focus Motor Replacement, Preparation: шаг 1, изображение 1 из 1
    • Wipe the lens body down with a microfiber cloth to remove skin oils which could later be carried to the internal parts.

    • Remove the lens hood and both lens caps to allow full access.

  2. Nikon 35mm f/1.8G Focus Motor Replacement, Front end disassembly: шаг 2, изображение 1 из 2 Nikon 35mm f/1.8G Focus Motor Replacement, Front end disassembly: шаг 2, изображение 2 из 2
    • Using a pry tool or small flat head screwdriver, lift up plastic cover on the front of the lens. Pry from the notch on the outside, far away from the glass.

    • Ensure you do not damage the filter threads when prying.

    • This cover is attached with double-sided tape which can usually be re-used, otherwise replaced with any off the shelf thin double sided tape.

  3. Nikon 35mm f/1.8G Focus Motor Replacement, Remove the focus ring: шаг 3, изображение 1 из 2 Nikon 35mm f/1.8G Focus Motor Replacement, Remove the focus ring: шаг 3, изображение 2 из 2
    • Remove the 3 PH00 screws and lift off the manual focus ring and filter thread parts. The colour of the screws may vary between batches.

    • No need to worry about the mechanical alignment of these parts when reassembling. Just make sure the white dot on the filter thread part is at the top (badge side) so your lens hood sits correctly.

  4. Nikon 35mm f/1.8G Focus Motor Replacement, Bayonet lens mount screws: шаг 4, изображение 1 из 3 Nikon 35mm f/1.8G Focus Motor Replacement, Bayonet lens mount screws: шаг 4, изображение 2 из 3 Nikon 35mm f/1.8G Focus Motor Replacement, Bayonet lens mount screws: шаг 4, изображение 3 из 3
    • Turn the lens over

    • Remove all 6 PH000 screws around the black centre part.

    • The small fat headed one goes in the small hole on the opposite side of the ring to the electrical contacts.

    • The three larger ones go in the larger holes.

    • The remaining two small ones hold the electrical contacts in place and should be installed last when reassembling, ensuring the black plastic sits flush.

  5. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 5, изображение 1 из 2 Nikon 35mm f/1.8G Focus Motor Replacement: шаг 5, изображение 2 из 2
    • Wiggle and lift out the black ring, leaving behind the electrical contacts and silver mount ring.

  6. Nikon 35mm f/1.8G Focus Motor Replacement, Bayonet lens mount removal: шаг 6, изображение 1 из 3 Nikon 35mm f/1.8G Focus Motor Replacement, Bayonet lens mount removal: шаг 6, изображение 2 из 3 Nikon 35mm f/1.8G Focus Motor Replacement, Bayonet lens mount removal: шаг 6, изображение 3 из 3
    • Remove the 4 PH00 screws on the face of the lens mount.

    • Lift away the lens mount without tugging on the electrical contacts which are still attached with a flat flex cable inside the lens. You may have to tuck this out of the way but do not apply any significant force. When reinstalling this mount, ensure the sealing gasket is even on the perimeter and hasn't been pushed out of place.

    • Under the lens mount there will be two silver spacer disks. These should be removed and placed in order with the rest of the disassembled components.

    • In my copy of the lens, the thinnest spacer is closer to the front of the lens.

    • Do not remove the lens body yet, even though it is now loose.

  7. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 7, изображение 1 из 1
    • Remove the PH00 screw holding the AF/MF switch in place and hook the plate up from the screw side.

  8. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 8, изображение 1 из 2 Nikon 35mm f/1.8G Focus Motor Replacement: шаг 8, изображение 2 из 2
    • Remove the lens body and feed the AF/MF switch back through the opening.

    • Take care when handling these wires as the solder joints will break very easily.

  9. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 9, изображение 1 из 2 Nikon 35mm f/1.8G Focus Motor Replacement: шаг 9, изображение 2 из 2
    • Pull the motor flat flex cable out of the connector in the direction shown. Do not crease, pierce or unnecessarily flex the cable.

  10. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 10, изображение 1 из 1
    • Remove the two PH00 screws which hold the micromotor gear assembly in place and loosen it but do not remove it yet as it is tethered in place.

  11. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 11, изображение 1 из 3 Nikon 35mm f/1.8G Focus Motor Replacement: шаг 11, изображение 2 из 3 Nikon 35mm f/1.8G Focus Motor Replacement: шаг 11, изображение 3 из 3
    • Remove two screws and top of the micro motor assembly.

    • Remove the screw securing the encoder contacts in place and release them.

    • Place the main lens assembly to one side to focus on the focus motor assembly.

  12. Nikon 35mm f/1.8G Focus Motor Replacement: шаг 12, изображение 1 из 2 Nikon 35mm f/1.8G Focus Motor Replacement: шаг 12, изображение 2 из 2
    • With the whole gear assembly now freed, remove the three PH00 screws securing the motor in place. Do not touch the castellated piezo-electric material as it being clean is crucial to the operation of the ultrasonic motor.

  13. Nikon 35mm f/1.8G Focus Motor Replacement, Motor repair: шаг 13, изображение 1 из 1
    • At this point, you can either clean the motor with isopropyl alcohol and a paintbrush or replace it entirely.

    • A few people have reported online that they have had success cleaning their motors, but this is not always the case. Replacements can be found on AliExpress or sometimes eBay.

    • Use clean gloves when handling the motor or ideally don't touch the critical sections at all. Nikon's service manuals for similar AF-S lenses also discourage touching the motor.

    • Wipe the end of the flat flex cable with isopropyl alcohol before reinserting it into the connector.

    • Personally, the author had success after cleaning their motor. The issue they faced was that the lens would focus when facing down but not upward. After cleaning it works fast and reliably, but with a squeak.

Заключение

To reassemble your device, follow these instructions in reverse order. Ensure the encoder and motor wires are connected. Do not over tighten screws, especially on the lens mount.

7 участников успешно повторили данное руководство.

James Baber

Участник с: 05/10/18

433 Репутация

1 руководство автора

5 Комментариев

My AF motor was making a loud noise for a long time, but was focusing properly. But later it got stuck. Then i happened upon this guide. Cleaning the motor with iso propyl alcohol worked for me (I even took apart the motor. It was not turning at all) Thank you so much for the guide!

Akhil Saji - Ответить

The screws are not PH (Phillips), but JIS (Japan Industry Standard). The difference may be enough to strip the screws. JIS screwdrivers are easily obtainable online, e.g. the brand Vessel.

Trond Kvitvik - Ответить

Hi, nice explanation on how to replace/repair the motor. I tried cleaning my 35mm f1.8G DX lens and removed the rear lens group but unfortunately I did not take note of where the focus ring was and the orientation of the rear lens group when I removed it. Does anyone know how to re-instate this group. There are two guides that go into slots of this group but I'm not sure how to put it back. Right now it makes a clunk when I turn the lens upside down. Thank you.

Anthony - Ответить

Hello, if it still squeaks, I would think about lubrication. Maybe lithium grease?

Andrew Davidson - Ответить

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