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Great Western Slab Saw Hydraulic Oil

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Author Topic: Great Western Slab Saw Hydraulic Oil  (Read 569 times)
claymoreminer
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« on: February 15, 2016, 03:10:54 pm »

I lust purchased a Great Western 18" Saw and need to know that kind of oil to use for the hydraulics.  Also need a manual - any help would be appreciated.  Thanks,
Clay
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catmandewe
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« Reply #1 on: February 18, 2016, 10:23:19 am »

Any hydraulic oil will work, you can even put clean  mineral oil in it.
The hydraulic only works as a dampener so that when you hit the end of the cut your carriage doesn't slam into the back of the saw. If you have the auto shut off attachment still on your saw you can also use that instead of the hydraulics to accomplish the same thing.

Good saw, you will like it.
PS- the most common mistake with that saw is to keep adding weight, that will make your blade glaze over and quit cutting.

Have fun with it.........................Tony
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bobby1
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« Reply #2 on: February 18, 2016, 04:48:21 pm »

I have a 24" great Western and the hydraulics system has a throttling valve on it so that I can control the speed of the carriage depending on the material that I am sawing. It doesn't have a shut off mechanism, just a bolt on the carriage that hits the back wall to stop the carriage.
I would like to find a parts list for the saw because the throttling valve is wearing out and the carriage doesn't always move smoothly or at a consistant speed. I will probably end up taking it to a hardware store and getting a matching one.
Bob
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slabbercabber
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« Reply #3 on: February 19, 2016, 05:51:42 am »

The flow control is not your problem.  It is simply a variable opening.  Once set it does not change.  First do a thorough cleaning of all moving parts to make sure it moves freely.  If that doesn't fix it, you have cylinder problem.  I don't know what Great Western used.  I once had a Twin Cities saw that used a home made cylinder of PVC pipe and plastic plug.  I build mine with non rebuildable cable cylinders.  Most hydraulic and pneumatic cylinders are rebuildable.
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bobby1
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« Reply #4 on: February 19, 2016, 08:50:45 am »

The throttle valve has to be opened and closed for each slab. As the carriage is cranked back the valve has to be open and in order to hold the carriage in the back position the valve needs to be closed. The cross feed is turned to move the rock over for the new cut and the throttle valve is opened slightly to slowly bring the rock against the blade. After it makes contact the valve is opened further to control the speed. This all has to occur because the weight is constantly hanging on the carriage thus the throttle valve is constantly being operated and I suspect that the needle has a groove worn on it where it makes contact with the valve seat thus distorting the even flow of oil through it. The hydraulic cylinder moves very smoothly so I don't suspect that it is binding or such.
Bob
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claymoreminer
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« Reply #5 on: February 24, 2016, 10:13:11 pm »

How much weight are you using on your saw?
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« Reply #6 on: February 25, 2016, 08:10:20 am »

I'm not sure. I'm going to the shop on Friday and I will check. It may not be marked.
Bob
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