Case 442 update

[IBC]

I took the hydraulic pump from my 69 442 to Livingston -Haven today and they tested it for me...no good.
I probably could have taken it apart and seen the wear and metal shavings.
The tech was surprised to hear that we run 15 40 in these instead of hyd fluid. Why do we run this ? Ed

 

[Tom Arnold]

We run motor oil in these tractors because hydraulic fluid has too low of a viscosity rating for the drive motor. Geroller style motors, such as those used to propel the Case/Ingersoll tractors as well as drive the rototillers, have larger internal clearances than motors of a different type. As hydraulic fluid warms, it thins out. The thinner oil bypasses the internals of the motor in a greater percentage than oils with a consistent viscosity. Motor speed is directly related to the GPM that is sent to it. No motor is 100 percent efficient but you try to keep the efficiency as high as possible. If using thin hydraulic fluids reduces the efficiency by 10 percent more than when using motor oil, then the tractor's ground speed will drop by 10 percent also.

I have owned and used Case skid steer loaders since the first hydrostats were introduced in 1975. They use motor oil in them too. There are many lawn and garden tractors, as well as ZTR's that use integrated hydro drives. Many of these use 20W50 in them, as per the manufacturer's spec.

If you need a new pump, then use the link below.

Click on "hydraulics" and then "pumps" and then "gear pumps" to find the listing for the AA series Parker pumps. Choose the last one which is the D27AA2A. Case sold many, many tractors with this pump. I have recommended it to about nine owners so far and not one has come back with a complaint about it. The price is the best you will find anywhere.
Pumps

 

[El Toro]

I would use what Case recommends. My Wards tractor by Gilson recommends ATF in the hydrostatic drive and the same oil is used on the hydraulic lift. In February I will have owned it 38 years. It has been used every year for plowing my garden and for 25 years I plowed my late mom's garden. I also use it for pushing snow. Hal

 

[IBC]

Thanks Tom, I'll check it out.
I have a New Holland skid loader that calls for 10 w 30 in everything (Makes it easy). My Bobcat though uses only Bobcat hyd oil.

 

[CaseNutty 1660]

Tom I like your post's full of good solid info I am sure I am not alone in saying thank you from all who post here one amendment to the last post the first Case skid steer to be a hydro was the 1816 model released in 1971 we had one in our dealership when our shop burnt in 1971 to bad it had 5 hours on it, any way enough of my two-cents Tom

 

[Tom Arnold]

Are you sure about that date? Maybe I just got some bad info.

My first skid steer was an 1816 with the Tec motor and it had a centrifugal clutch on it what was a problem. The other problem was the starter motor. It kept burning out. I think that I bought my 1830 (gas job) two years after buying the 1816. Bent the lift rams twice before I had my hydraulics guy make larger rods for me.

I was pretty certain that the 1816 had been just introduced when I bought it and that the year was 1975. Could be wrong though.

 

[TammyK]

I think this is a little off the subject but think from what I read that you may be able to help. I have a 1830 Case skidloader that I was told needed hydrostats where do I go to find them and can you explain to me what oil should be used as hydraulic seems to get awfully thin