Hillman, Herbert and Cooper ‘Kangaroo’ No.1 Roadster c.1885/6 – Part 2 – Preservation process
The first step in the preservation process was to photograph the bicycle many times in great detail from all angles. This was to ensure everything was replaced in the correct position. The bike was then very carefully disassembled and all the parts placed in plastic bags, labelled as to their location, left or right side etc.. I also use a notebook to record details of each part, which way round bolts were fitted, assembly order, washer locations etc.., making drawings where necessary.
As with most top quality machines, such as my Rover, virtually all the parts were stamped with the frame number (23467) Even the chains had the frame number stamped on the ends of the rivets! Presumably each machine was assembled and components adjusted for best fit, before the stamping. The various parts then went for nickel plating and enameling, and were then re-united for final assembly.
The corrosion on the parts of the machine was not at all bad, so I decided to make the cleaning process quite minimal, removing dirt and loose surface rust, whilst retaining patina by light cleaning only. The bearings were soaked in cellulose thinners overnight to remove the encrusted hard grease. The parts cleaning was largely done manually using paraffin, brass brushes, and three grades of steel wool, finishing by polishing with 0000 grade. Doing this by hand takes a long time, and results in blisters, but it is the only way of carefully controlling the amount of surface removal, to retain the patina.
Turning to the enameled parts, I masked the area of the transfer then cleaned the frame with paraffin. 0000 steel wool was used on stubborn dirt, as this does not scratch the enamel. Following cleaning, the enamel was then polished with Renaissance Pre-Lim to remove any remaining surface grime and to lightly revive the enamel. This was also used in the area around the transfer, very carefully and lightly! Finally all parts of the machine were polished with Renaissance Wax. Several coats were applied to protect the surfaces.
Here are some ‘before and after’ photographs:
The ball bearings in the main bearings are in two rows, fitted in brass cages. All ball bearings were replaced. As you can see, bearing adjustment is a bit primitive simply relying on the movement of the lower section of the bearing housing, locked in place by a set-screw.
The Singer pedals had just two original rubbers remaining. Reproduction rubbers are available for these pedals, from Doug Pinkerton, although they are not quite accurate and are very difficult to fit!
The rear step is a beautiful thing!
The beautiful etched Hillman, Herbert and Cooper name and ‘Kangaroo Patent’ was revealed on the seat spring. This was completely invisible before cleaning.
Remains of the maker’s transfer on the backbone, before and after cleaning and waxing. A very rare survivor.
I didn’t want to radically alter the appearance of the bike, as it was so original, and I was very satisfied with the result of the cleaning and preservation. The Kangaroo will look better once it has been used a bit, but is now properly protected as it embarks on the next 130 years of its life!
The next post will be of the machine in its completed state.