On the left side of the gear shifters
Beside the gear shift levers
To the left of the gear shift lever, large plug on top of transmission. Fill here,
sae 90 gear oil. it is 100% mineral oil. napa, car quest, call your local massey dealer they have it. you will pay a little more but they have all the answers.
You're probably looking at the transmision/hydraulic oil level. The filler hole is a hex-head bolt just below (towards the seat) from the left-hand gear stick.
If the trans is locked in one gear, and the stick refuses to move, it has very likely jumped out of the shift selector rods. You will likely have to remove the shift stick cross pin, to pull the stick out, and manually with a long flat screw driver, shift all rods to the neutral position. There are cut aways in the rods. The neutral position should be when they are all in the same general location so the stick can move between them. Test this by bumping the starter, before replacing the stick.
There is a cap right next to the gear shifters. It's about 1-3/4" dia or so with a hex head on top. The hydraulics share the same fluid as the transmission.
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.
linkage is sticking
For the Massey Ferguson 124 baler's main gearbox, it is typically recommended to use an EP (Extreme Pressure) gear oil with a viscosity rating of 80W-90. Always check the owner's manual for specific manufacturer recommendations, as they may vary based on model and operating conditions. Ensuring the right oil type will help maintain optimal performance and longevity of the gearbox.
The gear stick has a diagram of where to move the stick to engage a certain gear. For example, if Gear 1 is in the top left corner, you must move the stick to the fair left, then forwards to engage first gear. Oh, and you have to push down the clutch each time you change gear.
To change the gearbox oil on a TEA20 Massey Ferguson tractor, first ensure the tractor is on a level surface and the engine is off. Remove the drain plug located at the bottom of the gearbox to let the old oil drain completely. Once drained, replace the drain plug and refill the gearbox with the appropriate oil through the fill plug until it reaches the recommended level. Finally, check for any leaks and ensure the fill plug is securely closed.