Hiya Steve and welcome to the forum.
There are a few manuals knocking about, one went for £57 on ebay last month, so excellent news if you can get your hands on one.
I`ve been using a Russek Mitsubishi L300 manual, as it`s the van our H100s are cloned from, and it`s very useful.
The brake disk replacement looks fairly straightforward, only fiddly thing is removing the wheel bearings so you can get the hub off.
I have some disks, shocks and pads all waiting to go on when it stops raining and will be using this link as a guide
Brake disk removal L300Let us know how you get on. :beer: