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Completed work

Step 6: Pulling the pins

A jig and jack job

The jig in place Applying heat The pin comes sliding out

The old pins were firmly stuck in their brackets - 'seized' as engineers called it - so getting them out was going to need a bit of cunning. 

First step was to create a way to get a good grip on the pin and apply some force. We cut deep grooves in the pin, and made a metal collar that fitted into the groove. The collar was attached to a metal frame (called a 'jig') that braced against the side of the lock at one end and attached  to a hydraulic jack at the other.

The next step was to apply heat - the engineer's best friend in getting siezed metal bolts to move because it makes everything expand a little bit and breaks the bond between the parts. We used a large gas torch, and it did the job. When we started up the hydraulic jack, it slowly dragged the pin out of its bracket, like pulling an old tooth.


This page is part of The restoration playbook