ENGINE FOR A CAT 60

[NORCALLOGGER]

Back about 2008-9 I cobbled up a couple of Cat model 60's, in 1:20 scale, for my logging company/railroad.
A couple of members recently asked about modeling the Cat engine and I said I would dig out the old pictures and post what information I had on my builds.  If some of the "captions" don't make complete sense it is because a lot of pictures are missing from this abridged version.

So here it is such as it is.



The frame has been incased with styrene angle and strip to give it the correct profile and size.  Rivet detail has been added, on the outside of the frame only, as the inside will be very hard to see in the finished model.  The engine block was cut from pine and the removable side inspection plates (styrene) added before it is fit to the frame cross members.




The flywheel on the 60 model was also known as the starter.  An iron bar was inserted in one of the holes in the flywheel, the spark and throttle were set, the compression release opened and the flywheel turned slowly until TDC was found then a vigorous tug on the bar would hopefully get it to fire.   Take a look here    http://www.youtube.com/watch?v=zeEKR7UHECc

The flywheels for the models were made from a piece of ¾ PVC pipe and some flat styrene sheet.  A brass rod was used as a centering pin and a means to mount them to the block.





Here the rear engine mounts have been built up from styrene and installed to the frame.  The operators deck has been added and some bolt detail put along the sides (behind the tracks).
The operators deck has to be pretty heavy/thick material as quite a number of pieces are drilled into, tapped into, or glued onto it before we're done.



That's enough for tonight,
more to come.
Rick

[Ray Dunakin]

Thanks, this is very helpful!

[NORCALLOGGER]

Here are a few more construction pictures for this morning.
Rick

Getting back to the engine, the parts making is becoming more challenging.  It took a while to figure out how to represent the oval shaped cylinders with their water jackets.  I finally decided on 7/16ths styrene tube and adding extra layers to one side and filing to shape, what the heck there are only 8 of them to do.




One set of cylinders filed to shape and ready to install on the base plates.  On the engine block the other set is mounted on the base plates with the top plates in place and the push rod tubes installed.




This close-up view of the cylinder assemblies, less the valve covers and oil cups, are sitting in position on engine block.  You can see a spacer has been added between the flywheel and the engine block to bring it to the correct spacing as shown in my detail photos.

[Gordon Ferguson]

Rick, thanks for taking the time and trouble to find & post ...... Very interesting how you approached this project.

And how about a few pics of the finished beasts, have only really seen a couple and would love a few more views

[Max Corey]

Have you ever started or driven one of these?  It is fun. The one I messed with is at the Museum of Alaska Transportation and Industry.  You have to be very careful once it fires up to pull the bar out, although the angled openings prevent it from really grabbing.  Makes the most wonderful sound and smoke rings are hard to model. *grin*

[Ray Dunakin]

Here's a video of someone starting up a Cat 60:

http://youtu.be/7oJUS3hXDvg

[kneighbarger]

Aother startup..
Ken

   http://youtu.be/9No5vWlfx4A

[NORCALLOGGER]

There are quite a few Cat 60 videos on You Tube now days, back when I was doing this project there wasn't really that much out there.  As I mentioned above, luckily I had access to a "Holt 60" to operate, photograph, and measure.  As well there are several 60 Cats at the Ag museum near Sacramento that are accessible to photo and measure. 

Gordon,
I'll see what I can do




In this picture you can see that the valve covers and oil cups have been added to the cylinder top plates.  The assembly that you are looking at on the front of the engine block is what I call the front gear box.  This box contains the drive gear off the crank shaft that turns the water pump gear (upper left of gear box) and the radiator fan, brass rod in center top.  That small tube in the center sticking up with a nail in the end is the oil dip stick.




This side view shows some of the detail a little better even with the distraction of the other tractor in the background.  A temporary brass shaft is sticking out the back of the water pump gear drive to build the water pump to.  The oil cups (the black gizmos on top) are made from brass rod and wire insulation.  These cups held the oil supply for the drip and wick oiling for the rocker arms.




I apologize for the poor picture but this shows some important parts.  The water pump is built of styrene parts and installed between the cylinder sets on the drive shaft from the front gear box.  The shaft then continues back to the magneto which is the lunch box looking piece on the left.  The gray wire coming out the top of the magneto represents the thin wall pipe that carries the spark plug wires to each cylinder.   It is almost impossible to see in this picture but the spark plugs are represented by small pieces of styrene rod inserted in holes drilled in the cylinder walls. The other end of the spark plug is attached to small copper wire stuck into the gray wire (pipe).  The white styrene pipe coming from the bottom of the water pump will eventually connect to the bottom of the radiator for the inlet water feed to the pump.


Enough for this evening
Rick

[Ray Dunakin]

Great stuff, thanks for posting it!

[lab-dad]

Good stuff!
Thanks!
Marty

[jim s-w]

Nice work.

Looking at the first video there's a bit of a design flaw in that the guy starting it gets a face full of exhaust for his efforts.

Jim

[NORCALLOGGER]

This shows the water lines attached to the cylinder water jackets.  The bottom line connects to the water pump on the other side and the one on top is the return line that will go to the radiator.  This is a good clear view of the brass tube cross member mounting the vertical tension spring on the sprocket rails and also the fake track rollers.




Here is a much clearer picture showing the water pump and the magneto.  Note the mag. is just sitting loose and the spark plugs are dangling loose from their wires and the holes are open.   The gas filter and mount has been added above the water pump between the cylinder sets.  Also the throttle rod has been added above the water pump shaft, through a bracket on the water pump and to a gear drive on the top of the front gear box.  This linkage will eventually connect to the control tower at the operator's seat and to the carburetor.




In this view a brass rod and some styrene nubs have been added to represent the compression release of the cylinders.  If you go back and watch that U-Tube clip on starting a Cat 60 you will see the operator reach down and close the compression release just after the cat begins to fire.
Also in this picture the sleeves have been added to the cylinders to receive the exhaust and intake manifold pipes



Jim's comment about the face full of exhaust is because the guy is standing right in front of the cylinder compression release openings.  If you watch you can see the guy in the blue shirt reach forward and close the release.  This compression release handle can be seen even better in the video I linked in my first post.

In the video posted by Ken you can clearly see the releases at work, though these are separate to each cylinder and not linked together. 

More later
Rick 

[Chuck Doan]

Thanks for the nice step x step Rick. I enjoy seeing your fabricating techniques.

The start up videos are neat-bet those guys would have loved a key fob remote starter!

[NORCALLOGGER]

Thanks for the nice step x step Rick. I enjoy seeing your fabricating techniques.

The start up videos are neat-bet those guys would have loved a key fob remote starter!

Yea, most of my methods are pretty rustic and results just so-so but I have fun and enjoy myself.



Here the exhaust manifold and riser pipe have been fabricated from 14Ga. Electric wire and styrene shapes.




Here the air cleaner and the intake manifold heater have been added.  The butterfly adjustment on the intake heater is a woman's dress snap.



The intake manifold has been installed with a bracket to hold the intake air pipe to the air cleaner.  The carburetor (two washers and an earring back) have been installed and the throttle rod extended across and back to the carb. 



Just a few more pictures to go.
Later
Rick

[finescalerr]

Rick, you have linked photos from Large Scale Central to this forum and as I write this their server is down. None of your images appears. They may appear later but if anything else should happen to LSC's server this thread will be useless.  Please upload actual jpegs. -- Russ