It is not torn, and the hard plastic binding from Caterpillar is intact. It has sections for the Engine, 3204 Vehicle Engine.
It has a section for Powertrain, for D3 Tractor Serial Numbers 6N 79U. There is a section for Specifications for Hydraulics, Serial Numbers 6N1-UP, 10N1-UP, 78U1-UP, 79U1-UP, and 80U1-UP.
And in the back there is a Lubrication and Maintenance guide for the D#, 6n1-UP, 82U1-UP, 79U1-Up, and 83U1-Up. Please look at all the pictures and ask any specifics you might have regarding this Caterpillar manual.