Hi Horace,
Sadly there's no easy way around this. You have to upset the whole dynamics of the mower to do this.
Removing the two sole plate attaching bolts and undoing the RH side reel bearing cap will allow enough flex in the side plate to do this without inflicting any damage to the chassis. I've always maintained there should've been a smarter way of designing the front roller frame but the Model 45 was never to be a greenkeepers machine, rather it was always designed with easy of production assembly in the first instance and taking into account it was merely a domestic mower. It's just that all of us have now put this machine up on a much higher plane than what the factory ever meant it to be.
Cheers,
BB.