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Front axle2 2Front Axle. The Caterpillar ® sealedspindle keeps the bearings free fromcontaminants and lubricated in alight-weight oil (1). This durable,low-maintenance design reduces yourowning and operating costs. Two taperedroller bearings (2) support the wheelspindle. The Cat “Live Spindle” designplaces the larger tapered roller bearingoutboard where the load is greater,extending bearing life.Gear Selection. Eight forward andsix reverse gears give the operator awide operating range. The specificallydesigned range of gears ensuresmaximum productivity in allearthmoving applications.Programmable Autoshift. The operatorcan easily customize various shiftparameters through Cat Messengerto match the specific applicationrequirement. This feature automaticallyshifts the transmission at optimal pointsso the operator can focus on the work,improving safety, productivity and easeof operation.1Brake design2Inching Pedal. Allows precise controlof machine movements in any gearwith low pedal effort and excellentmodulation, critical in close-quarterwork or finish grading.Hydraulic Brakes. The oil bathed,multi-disc service brakes arehydraulically actuated (1), providingsmooth predictable braking and loweroperating costs. With brakes located ateach tandem wheel, the 12M offers thelargest total brake surface area in theindustry (2), delivering dependablestopping power and longer brake life.Brake Serviceability and Reliability.An easily accessible brake wearindicator/compensator system (3)maintains consistent brake performanceand indicates brake wear withoutdisassembly. This system cuts servicetime and extends brake service life.Parking Brake. The spring-applied,hydraulically released multi-discparking brake is a sealed, oil-cooleddesign extending component life andreducing the need for service. The parkingbrake is integrated into the OperatorPresence System to prevent unintendedmachine movement.1 231311