1 Answer

Difficult steering (Tight)
When steering becomes tight and difficult check the following points.
•Kingpin (Spindle) thrust bearings have collapsed. This is normally represented by a gap between the bracket affixed to the top of the kingpin and the kingpin housing. Remove kingpin and replace thrust bearings.
•Kingpins and /or steering pins suffer from a lack of grease and have become clogged with dirt and rust. Grease all points and if necessary remove, clean and replace worn parts.
•Steering box needs attention. Steering box internal components such as shaft and bearings may need replacing or lubrication.
•Front wheel weights mounted on front wheel rims tend to make the tractors steering heavier than normal. It is advisable to remove these and preferably mount nose weights onto the tractors weight frame secured onto the front support. 

Massey Ferguson tractor troubleshooting guide