It does not take much water to make foam, I forget the size of the foam tank on the 530B 2/12 ton Pumper, but 50 Gallons might be it. The Foam additive came in 5 Gallon Cans.
US ARMY HONOR GRADUATE MECHANIC, Restorer of fine Jeeps, MV's, MVPA 40+yrs, DAV, Army Aircrew member, Donor to Military Museums & CAF, MV Hobby since 1945
Other Hobby- Army Air Force & Busting Big Ass Military Imposters-Good at it
Here's the picture flipped, cropped and color fixed:
I guess the weight of the water tank must be substantial as they mounted twin wheels on each side in the rear.
As always,
Goran N
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Goran Noren
Dodge WC51 1945
Built: 2/12/1945
Marked as an ambulance of the
Brazilian Expeditionary Force, Italy 1944-45
&
Willys MBT
ACM no 57482
Manufactured: July 1943
MVBros - Your need - our mission