I don’t have the specs for the Buffalo but have scanned on the Octopus specs for the 502 511 & L12 engines and the Octopus 2 with the L12.
From memory we had two Bisons N reg which had the normal aspirated 500,6 speed box and the 4 spring rear bogie.
We than got a P reg Octopus with the 502 turbo,Fuller 9 speed and 2 spring rear bogie.
Next was an R reg Bison with the 502 turbo, 6 speed box and the new 2 spring rear suspension, this one also had the new “brown trim” cab.
The later Bisons up to V reg had the 502 turbo, Fuller 9 speed and two spring rear bogie. First Bison with the TL11 was W reg.
Apart from the two N reg all the 500 series we ran had the vertical stack which made then ideal muck shifters. More than once site foremen commented that the vertical stack created less dust on site.
Tynesde
