HELP! Bristol RE fluid flywheel
 

Hi

The Bristol RE that I have a hand in maintaining has a problem, in that the fluid flywheel is keen on chucking its oil out. The oil is mostly leaking along the driveshaft but also appears to be seeping from the joint around the circumference.
Is there anybody on here with experience of these things who can tell me whether the relevant seals/gaskets are replaceable and what is entailed in removing the fluid flywheel from the vehicle? The engine is a Leyland 0680.

Thanks,

Andy