Cat 12G to 140M2 AWD specifications

Early 12G identification and the M2 control changes

An early 12G parts book identifies its covered machines by the 61M serial range and directs engine-parts work to the separate 3306 book. The engine block has its own identification plate. That separation matters when an advertised grader has an engine replacement: the chassis designation alone does not establish the installed engine arrangement.

The same early book distinguishes circle drive, centershift, blade lift and wheel-leaning components. Its implement index lists blade extensions, cutting edges, ripper equipment and different scarifier arrangements separately. A machine called a 12G can therefore require several equipment checks beyond the moldboard's advertised width.

Identify which attachment is installed before matching its control linkage or replacement wear parts to the book.

The 12G service-manual extract also distinguishes scroll and sleeve-metering fuel systems within its engine coverage. Those headings do not establish that both arrangements fit every 12G. Use the engine plate and the applicable arrangement before following a fuel-pump timing procedure; a troubleshooting heading for the broader engine family is not an instruction for every engine carrying the 3306 name.

140M2 AWD has a distinct finishing mode

The 140M2 brochure describes two different uses of its AWD hardware. Normal AWD uses independently controlled left and right front-wheel pumps. Its hydrostatic finishing mode disengages the transmission and drives the front wheels alone.

That is a specific operating mode, not a claim that the grader's entire transmission is hydrostatic.

M2 joystick functions also cross several systems. The left control combines steering and travel selections with left blade lift; the right handles circle, centershift and other blade functions. Record the affected movement when describing a control fault.

The hydraulic lockout disables implements while retaining steering, whereas the secondary-steering pump responds to a steering-pressure loss. These functions address different conditions and should not be treated as interchangeable switches.

Finally, compare the power-rating headings. The brochure separates gear-dependent VHP Plus output from the AWD power range and lists maximum engine torque separately. A gear-specific horsepower row is not the engine's maximum-torque rating.