Want this question answered?
When you pour it in the crankcase fill spout.
To the left of the gear shift lever, large plug on top of transmission. Fill here,
Hydraulic fill is on top of the transmission but be sure to remove both drain plugs at the trans and back end as they are connected before refilling.
to the left of the gear lever is a cap with a 1 1/16 bolt head on it. remove that cap and fill there. To check the level the is a small dipstick under the lift on the frame.
Try your local AGCO or Massey Ferguson dealership. Go to (the related link at the bottom) and fill in the required information. A screen should come up with a liat of dealers. Any of them should be able to get you any Allis-Chalmers parts you need.
It is located beside the fill hole on the exterior of the machine
On the slightly newer CK20S, if you are sitting in the tractor seat, the hydraulic fluid fill will be near your right hand as you reach down below the seat. It has a red cap on it that says "oil". This is NOT the engine oil, but rather the hydraulic oil.
Open battery access door behind steps on left side of tractor. On side of transmission housing is a combined dipstick and fill tube.
there is a rubber plug on the top portion of the motor .remove the plug,fill and put plug back on
You may use two different hydraulic oil 1st is a 80-90 hydraulic oil available at the same store, also the recommended orginally was a mineral oil 90w . I have found both of these at your local tractor supply stores. The mineral oil is the least expensive running about $16.99 for two gallon container. The mineral oil will say on it for Ford 1952 through the 1960 years. It is the same again as the orginal mineral oil specified in the service manual. Both of these oils fill the transmission combination rear axle and hydraulic. There is one fill hole as you set on the drivers seat and look down at the left side of shift handle about 5 inches over you will see the hex headed plug for filling. The dip stick is on the right side below the hydraulic handles and at about heal level above the running board again as you set on the seat. There is a hole passage way that connects the transmission differetial hydraulic together about 32 quarts of oil is needed to fill don't forget to check and don't over fill. Check this level occasionally especially if you are leaking some around the pto shaft output.
Look for a hinged panel between the loader uprights. That is where the hydraulic reservoir fill port is located. Lift the hood for better access.
under the seat of tractor is the hydraulic reservoir. fill it to the line on the dipstick.