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GU Old Style Replacement uPVC Gear Box Door Lock Centre Case 35mm Backset


GU Old Style Door Lock Gearbox Centre Case

High quality & All metal Parts

A replacement centre case gearbox for the GU old style multipoint door lock mechanism. If you're having problems with your door lock, the gearbox is almost always the problem and changing it is as simple as removing a few screws.

Product Information

  • Important Measurements: 35mm Backset / 92pz Centres
  • This is the mechanism inside the door that is operated by the handle.
  • Most likely to be the problem when a lock fails.
  • Reversible latch for left or right handed doors

Fitting Advice

Gearbox is easily reattached to the locking strip via three star head screws.

The diagram below gives all sizes needed to identify the lock, however, if you need more information please contact us.

Write Review

  1. GU PVC Door lock - old model. 4

    Posted by Leonard Wright on 21st May 2019

    The lock arrived within 3 days of placing the order. It took less that 15 minutes to remove the faulty lock and to fit this new replacement. The main dead bolt was a bit tight , but this was remedied by a little filing down of the the top and bottom of the dead bolt until movement became smoother. A few adjustments were needed to the positions of the existent door guide plate but this was quickly remedied. The lock is now working very well and if like it's predecessor, good for another 35 years. I am happy to recommend this lock to anyone seeking to resolve the same problem that I had.

  2. Pleased pto receive...... 4

    Posted by DLW. on 22nd Apr 2019

    First order from this store
    Very quick standard delivery
    Very helpful staff with phone query
    Steel replacement for old original brass gearbox had slightly thicker bolt which required a little enlargement of the slot in door guide plate, otherwise all good.
    Would recommend.

  3. If only....... 5

    Posted by Michael on 3rd Feb 2019

    Every business took things seriously enough to supply good quality replacement parts that fit and operate correctly as DIY store does life would be a breeze.
    Excellent drawings of the product with dimensions makes the whole job of ordering a pleasure.
    Firmly logged in the memory bank for the next time I require any spare parts, first class all round would recommend to anyone.

  4. replacement door gearbox 5

    Posted by Robert Lock on 30th Nov 2018

    Great efficient service from this company website made it easy to locate the correct part I needed to repair door new part fitted in 20 minutes now working like new very cost effective really pleased with result

  5. great value 4

    Posted by Unknown on 4th Nov 2018

    Great value for money good delivery service easy product to fit saves buying a new door