Hello, it's been probably 20 years since replacing the last input housing seal and don't have my workshop manuals to hand. From memory and in order to remove the input housing the tractor will have to be split between the gearbox and centre housing. The top shaft is then withdrawn rearwards allowing a gear inside to 'drop' and allow the input housing to be removed. The seal can then be replaced. This is for a 6-speed transmission. I believe that if Multi-power, the tractor will not need to be split between the gb and ch.
It is always worth replacing the lower plate gasket and making sure that bolts are tight. Make sure that the plate is not deformed around the holes.
Unhook the release bearing/carrier assembly and remove. With the bearing supported on vice jaws and using a large socket or simiar tap the carrier out. Apply copper grease or similar to the fork contact points and inside the carrier.
Yes, the pilot bearing is in the flywheel and can be knocked out easily once the flywheel is removed.
No, a rear crank seal from YT is not likely to be a genuine one. I would not fit anything that did not come out of a MF or Perkins bag.
Your special tool numbers are different from ours. I suspect that this number refers to a seal protector. This is like a thin alu cigar tube. It fits over the spline to protect the seal. Insulating tape used cautiosly is an alternative with oil.
A genuine workshop manual is essential You will of course require a clutch plate alignment tool and release lever screw setting height setting tool and one for the the pto adjusting screws.
DavidP, South Wales