case 150

After draining the fluid from the hydraulic (lack of a better word) does one need to prime anything? Seems like it took a while for the system to pressure up (lack of a better term)

most of the case have the resivior above the pump so we just fill and run.

on the 150 the pump is on the back of the engine and all the lines run below that in the frame.

Let me start by advising you about two major mistakes that novice Case owners make.

1. They drop the hydraulic oil from the trans-axle but they fail to remove and clean the suction line intake screen. Bad move. You need to remove the steel line that runs between the pump and the trans-axle. Upon removing this line, you need to place a socket on the large hex fitting that the steel line screwed into at the trans-axle. DO NOT USE AN OPEN END WRENCH.

Once this fitting is loose enough to turn with your fingers, run it all the way out and then pull straight back. The suction screen is part and parcel with this fitting. Clean this screen completely and shine a light inside the opening to see how dirty things are inside. If they look bad, then remove the seat, seat pedestal etc and take the top cover off the trans-axle.

Flush the trans-axle out using diesel fuel or a solvent such as Varsol. Use some old rags to soak up any excess flushing agent and then install the suction screen and line.

2. YOU DO NOT PUT HYDRAULIC OIL in a Case tractor. You use only MOTOR OIL, nothing else. If you are not going to use this tractor in temps below the freezing point, then buy yourself 12 quarts of a good quality, straight grade 30W detergent-based motor oil and dump it directly into the trans-axle before you put the top cover back on. Fill to within one inch of the top of the casting and install the cover with either a new gasket or use a silicone-based gasket caulk in a tube from your local auto parts store.

You do not need to do anything about priming the pump. It will pick up the oil immediately as long as you fill the trans-axle to where I mentioned.

I suggest you use the link below. Click on the illustrated parts list icon and then scroll down the page to find the PDF for the 150/190 models. You can download that parts manual to your hard drive or just print it out for free either way. If you locate the page with the exploded view of the trans-axle, you will clearly see the suction line filter I referred to.

Alternate choices of oil are 20W50 or if you intend to use the tractor in the winter, 15W40 will work all year 'round. As for the Kohler engine, use nothing but straight 30W detergent oil in plus freezing temps and 10W30 only when operating in temps below 32 F.

Change your engine oil every 25 hours of run time and always check your oil level every time you go to use the tractor. Do not allow the oil level to drop. Keep it filled to the line on the dipstick at all times. Those who fail to do this end up with a broken rod.
Ingersoll