In the spotlight for restoration this week is a rather old and crusty SPIRAL or SCREW BOTTLE JACK. Im not sure what year or make it is but i thinks its safe to say its quite old and has seen better days.
The first thing to be done was to chock the jack up in the vice and drill the heads of the rivets off but as you will see in the video drilling them didn't weaken them sufficiently as they were solid steel rivets not hollow pops, so i had to take the violence level up a notch and break out the angle grinder and punches which worked a treat.
Next step was a complete inspection to see what challenges lay ahead and much to my surprise the internal condition was way better than i was expecting.
At this stage of the disassembly im sure lots of you will be rather upset with me for not removing the gear assembly from the main body and i have a perfectly good reason for not doing it. The screw/spiral is pinned to the main gear and i didn't have a good enough reason to remove it to warrant the risk of cracking the gear, and the main body of the jack has two key ways punched into the casing to prevent the slides coming out completely and again i didn't grind the key ways off to remove the spiral as i have no way of punching the keyways back in again. Anyway......
Next was a thorough washing and degreasing with gunk engine cleaner to remove all the oil and grime and then a hot bath in all purpose cleaner to remove any final oil residue. I then gave all the parts a liberal coating of paint stripper and as you can see from my gloves the effect was immediate on this old paintwork, then all the parts got another cleaning before being left to soak for 24hrs in a rust removal bath.
Now that the jack was in bare steel my first priority was to get a coat of primer on it to stop any moisture in the air or on my hands corroding the steel while rebuilding and getting ready for paint.
The first job to tackle was rebuilding the bearing with new ball bearings and grease and ensuring that it runs smoothly. After that the main gear and screw was greased the bottom plate was fitted then riveted on solid with new pop rivets.
Once that was done it was time for the final masking and start of the paint job. 3 heavy coats of high solid high build primer were applied and flatted back with 800 grit wet n dry to give a blemish free finish before moving onto the mid coat which is a skoda race blue metallic (very similar to Subaru world rally blue ). Then came several coats of clear till adequate depth and clarity were achieved.
And after a quick polish of the bare metal components the restoration was complete and i must say im delighted with the way it turned out.
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5 окт 2024
