Kozo K27 Link Support and Crosshead Guides
This segment will cover the link
support and crosshead guides. In this shot the link support is seen
below the running board level and supports the arced link block. The
crosshead guides run from the bottom of the link support over to the
The initial machining of the link
support outer plates has been completed. These were machined as a pair
by bolting them to a plate and cutting the arc with the arc function of
the DRO. These will be machined further once they have been soldered to
the other pieces. June 14, 2020.
The initial machining of the link
support inner plates has been completed. These were also machined as a
pair to cut the arcs and notch. June 26, 2020.
These are the rear blocks for the link support. The outer plates above
will be bolted to the tabs on the one end and the inner plates will fit
into the groove seen on the lower block for soldering. Note that the
top block is oriented to show the back side. Once soldered together the
link supports will be further machined as an assembly to get rid of the
tabs and bolts to look more like a casting. June 26, 2020.
This is one of the front blocks on the
link support assembly. I managed to finish this one before it got too
hot in the shop after the AC decided to take a dive. It will probably
be a couple of weeks before I can get some cooling going again and get
back to work on the project with temps over 110. July 2, 2020.
The link support assemblies are really
starting to take shape. A few round discs will need to be made for the
bearing supports and the blocks for the crosshead guide rear
supports will need to be added. Once those items are machined all of
the pieces will be soldered together and the final finish machining
performed. July 24, 2020.
It took quite a while to get cooling
back in the shop but I'm now back in business. These disks will be the
bosses that the bushings on the link supports will be held in. Aug 15,
These two blocks will be the
attachments points for the crosshead guides on the front of the link
support assemblies. August 16, 2020.
The link support assemblies with all
of the parts screwed into position. The next step will be to solder the
assemblies together and perform the final machining. August 16, 2020.
One of the link support assemblies
after the first pass at soldering. Two more discs for the bushing
bosses still need to be soldered at the open hole locations. Two
soldering passes are required since the piece has to be flipped for the
solder to be placed. August 22, 2020.
This is one of the supports after a
lot of the finishing machining has been completed. The side rail
finished width has been set, the final arcs cut, the arced
triangle, a couple of steps on the mounting tabs and some tapers on a
couple of pieces. Left to be done is the mounting holes on the tabs at
the bottom, a step down on the crosshead guide support and drilling and
reaming of the bushing bosses. August 23, 2020.
The machining of the two link supports
has been completed with all of the mounting holes drilled and the
bushing holes drilled on the front and back sides. The back side
actually has two bushing holes with one being across from the front
hole and the other at the top end in this shot. Note that the edges of
these will be rounded with a file to make them look more like castings.
September 5, 2020.
This is the cross tie that will attach
the front end of the link supports to the frame rails. The feet on the
bottom will sit on to of the frame rails between the first and second
drivers. September 6, 2020.
The front cross tie has been bolted to the pair of link supports. This
is a bottom view showing the feet that will attach to the top of the
frame rails and the crosshead guide supports at the top. Next will be
the construction of the rear cross tie. September 6, 2020.
The rear cross tie has been machined and soldered together. September 7, 2020.
This is a look at the complete link
support assembly with all four pieces bolted together. The next step
will be the machining of the feet that sit on top of the frame rails.
These will need to be adjusted to place the crosshead guide supports at
the proper height to line up with the supports of the cylinder
assembly. September 7, 2020.
These are the crosshead guides which have been machined to size and mounting holes drilled and tapped. September 18, 2020.
The link support assembly and the
crosshead guides being test fitted on the frame. The next step will be
locating and drilling the mounting holes in the frame for the link
support assembly and machining the six bushings for the shaft in the
assembly. Once that is done this assembly step is completed. September
The bushing set for the link support assembly has been completed and ready for installation. September 19, 2020.
The link support assembly now has
bushings and all of the mounting holes in the frame have been drilled
and tapped. This completes this assembly and now it is on to the
pistons and crossheads. September 19, 2020.