Hello,
pump in the fornt is a wasterlain, you have landuyt from bruges and wasterlain from vilvoorde who were the major firetruckbuilders those days.
Gpm would have to check, but it's a lot, they always had 2.500l in a tank in the back just to start with...
Pump was crank driven and could be operated from the front, with leaver to engage, to go faster, etc, even starting and stopping the engine from the outside. Gauges for temp, rpm and everything are in the front to.
There are also "midships" with the pump behind the engine, and operating from the side.
More belgian ihc fire trucks:
historical fire engines europe
The local gathering of firetruckowners:
pompiers oilsjt | facebook
And my own page for the projects:
http://www.facebook.com/krustycustoms
But realy need to find the hardware to adjust the brakes....
Greetings
michael