Beside the gear shift levers
On the left side of the gear shifters
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
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.
nathan
You need to lift the collar on the gear stick to engage reverse gear