TUBE 5255399 - Caterpillar

Description
Front Of Cutter Assembly Rear Of Cutter Assembly The cutter assembly includes the cutter, the housing and the moldboard.The cutter is a cylinder (drum) with 284 replaceable tungsten carbide bits (teeth) that mount in replaceable holders. The holders fit into blocks that are welded to auger type flighting that is welded to the drum. The bits break the material loose and the flighting channels the loose material onto the lower conveyor. The cutter drum is filled 3/4 full with a 50% solution of water and ethylene glycol antifreeze. Power from the cutter engine is transferred to the cutter by means of a power take-off, a drive shaft and three belt drive assemblies. When the clutch in the power take-off is engaged, the power take-off acts through a belt drive assembly to turn a drive shaft mounted under the mainframe. The drive shaft turns a belt drive assembly at each end of the cutter and the belt drives each turn a planetary gear reducer, one gear reducer inside each end of the cutter drum. When the gear reducers rotate, the cutter drum rotates. The cutter housing, which is pin-connected to the mainframe, supports the cutter and encloses the cutter. Nozzles in the top of the door spray water into the housing to control the dust created by the cutting operation. A moldboard at the rear of the housing prevents material loosened by the cutter from moving back under the machine. Two hydraulic cylinders connect the moldboard to the housing and provide the moldboard with 3 inches of vertical "float". Hydraulic pressure in both sides of the cylinders is vented to the hydraulic oil tank when the moldboard control is at "Float", so the weight of the moldboard keeps the moldboard in contact with the freshly cut surface at all times. The blade of the moldboard is replaceable. A hydraulically operated full width door on the front of the cutter housing provides easy access to the cutter for inspection and/or replacement of cutter bits. A hydraulic motor can be used to slowly turn the cutter so that the bits can be reached. Control system pressure is used for the hydraulic motor so the cutter engine (engine A) need not be running.An air operated hammer and a punch are supplied with each machine to facilitate changing the bits when they are worn or broken. The bits should be replaced as a group so that all bits are approximately the same length. A single bit longer than the surrounding bits may break the bit or holder when the bit hits the concrete.A manually operated bit puller is also supplied with each machine so the bits can be changed without air pressure if necessary.Removing The Cutter Assembly From The Machine
1. Park the machine on level grade and shut both engines down. 2. Remove the elevation sensors from their mounts and install them in the shipping mounts on the handrails.3. Remove the elevation sensor mounts and/or grade sensing wheel assemblies from the cutter.
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