Tools: Cazeneuve HBX360 (Part 4)

Short update from the flight deck workshop. Our Cazeneuve project is doing well. Slowly but surely the rusty pile of parts starts to look like a machine again.

See the previous articles… Part 1, Part 2, Part 3
And stay up to date with  Part 5

[toc]

Control Enclosure

Solid 1960s technology. The lathe is powered by a Dahlander motor with the corresponding circuitry. By adjusting the number of powered motor pins the speed can be changed – achieved all mechanically by multiple contactors and aux contactors.

For the moment the control enclosure will remain unchanged. We will just disassemble, clean and check everything.

The previous owner has added an external lubrication pump and a measuring system – poorly wired into the existing switch board with luster terminals. Soon some new terminal blocks will be added as a corrective measure.

Heidenhain Glas Scales

Good news first! The two very expensive Heidenhain glas scales are both still in good working condition. After many years of abuse the seals have disintegrated completely and gave way to tons of small chips and dried residual lubricant.

For our all surprise: no shorts and still reading out… amazing piece of equipment.

Disassembling, cleaning with alcohol and compressed air. Only the residuals of the old seals are still causing some trouble. Tightly molded to the aluminum profiles they are a pain to remove.

Bits and bobs

10 percent of the total work causes 90% of the troubles. Prior to painting we still have to remove the gear levers of the main gear box. After 40 years in service the splint securing the shaft needs some persuasion to come out (hammer and ejector drift).

The solution: 1/2 inch ejector drift expansion.

Time to buy an endoscope for the shop…

Paintjob

Body

A dream in white light gray. Just one hour later and the body looks brand new again. All in all I am happy with the result… some minor spots will be repainted at a later stage. A pity! Masking is by far one of the most time consuming tasks in painting.

In the next days we will start painting the RAL black gray parts. But first a lot of blue-greenish paint needs to be stripped down…

Next!

Sorted by their color (to be) the remaining parts wait eagerly in line for their paintjob.

Preparation & sand blasting

Stripping of paint is currently done with three different methods. Without a properly sized sand blasting cabin (we are talking walk-in 5sqm here) no single one method turned out to work for us.

  • Stripping with high concentrated acid, acetone and nitro
  • Grinding with steel brush and nylon disks on the angle grinder
  • Liquid sand blasting with a power washer

Liquid sand blasting turned out to be a good solution for detailed parts. Although our Kraenzle power washer just barely fulfills the minimum requirements of the sand blasting gun (10l/min, 150bar) the result looks great.

Still there are some disadvantages… 1. blank steel parts tend to corrode immediately 2. The shot is lost and consumption quite high 3. Its winter and the parts freeze over

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.