wheel horse hydraulic pump supplier

We offer a variety of hydraulic hoses for Wheel Horse Tractors.  If you do not find what you are looking for or do not have a part number, please call, text or message before you place your order.

Most gear pumps like thicker oil. The only thing you have to think about is winter use. I don"t remember what oil was specified for these units. Normally the jack oil we used was ISO32. If you are working a pump hard without much cooling you can even go up to a 400 sus oil viscosity. We did that on some railroad jacks that were using only a gear pump to power them. Pressure is temperature too. Especially with a gear pump. If you are running at pressures higher than 500 or 600 psi you are going to start generating heat with a gear pump due to slip. At 2500 psi you need a thick oil to get the efficiency out of the pump. Motor oils like a 40W or even 50W oils would be in the 150-200 ISO viscosity range. You could go with a 20W50 synthetic as an option if you were looking to reduce blow by and still get flow when it gets cold. Let"s talk about base oil stocks. That is what the oil companies start with when the start to blend oils that they market. It used to be almost everything was Group 1 which was what 100% of motor oils used to be. It was created by cracking crude oil in the same way it had been done for more than 75 years. Now a days everything is pretty much Group II. That means they have a way to do additional refining to remove the things from the base oil that affect its viscosity with temperature like paraffin, and the other contaminates that cause higher levels of oxidation and reduce lubricity. Purity levels on base stock oils can be as high as 99%. These oils are referred to a white oils, similar to what you see in a bottle of baby oil. High purity and non toxic before they put in the additives that improve wear like zinc and other additives that reduce foaming and improve air release. Because most oils today are made from Group II base stocks motor oils can even be an option for many hydraulic systems. The semi synthetic motor oils out there today can provide high performance with a nice blend of viscosity performance for simple hydraulic systems. The link below is a good place to understand the relationship between SAE grades and ISO viscosities. Enjoy!

I am not a Wheel Horse collector and know very little about them.  So this section just contains the information that I’ve managed to collect while finding information on rebuilding Cub Cadet pumps.  The two pumps are built so similarly that I would recommend reading the Cub Cadet section for anyone that’s interested in rebuilding a Wheel Horse pump.

The major differences that I see are:  The WH pump (red pump in above picture) obviously has different fittings for the hydraulic connections.  The control handle for the WH pump screws into the top of the control instead of the side.  The Cub Cadet pump has  a fill plug in the reservoir while the WH pump as a fill plug in the “head” of the pump.

had major internal differences.  Take special note of the valve return spring and the configuration of the valve itself.  Also, it’s not obvious in the picture,  but the right-hand stub shaft that holds the driven gear, is 1/2″ diameter.  In a Cub Cadet pump, that stub shaft is 3/8″ and the driven gear has a 1/2″ O.D. by 3/8″ I.D. bearing in the gear to fit the smaller shaft.  The Wheel Horse pump contains no bearing.

I had planned to use the pump for parts, but managed to find a new spring  that can be ordered from JC’s Farm &Garden Supply.  It is part number 4837 and their phone number is (219) 299 4708.  They also carry replacement gears.  They have the replacement spring for the pump like the one used on a Cub Cadet as well, Part No. 5281,  If you want to order parts from them, just call the number above and leave a message.  John will call you back.  Do Not use the JC’s Supply website.  It belongs to a previous owner and has no connection to the present owner. )

Now the only problem was getting hydraulic fluid into the reservoir.  (I always use Hy-Tran hydraulic fluid in these pumps.)  The WH manual shows using their brand of hydraulic oil in a smaller squeeze can.  I tried using a plastic bottle that I had, but only succeeded in making a mess.  I ended up using a system I use to fill the creeper on a Cub Cadet.  I’m sure if I worked at it, I could come up with a simpler pipe system, but these are the parts I originally had and continue to use.  I only had to add the bottom fitting to get it to match up to the WH fill hole.