PR-450 PAVEMENT PROFILER Preparing The Machine For Operation Caterpillar

The steering indicator is used to give the operator a reference to steer by during the cutting operation. The guide mounts in a bracket on the front track fender and can be slid in or out to position the vertical rod.

Installing The Elevation Sensors, Supports And References

The sensor supports and references provide a flexibility that allows numerous arrangements to match the varying conditions on different jobs. The following described arrangements are typical, but not all inclusive.

Regardless of the arrangement of the sensor supports and references, the sensors must be installed in one of two ways. If the reference rod is closer to the rear of the machine than the sensor, the sensor shaft must point away from the machine. If the reference rod is closer to the front of the machine than the sensor, the sensor shaft must point toward the machine. The arrow scribed on the sensor shaft should point up and the feeler rod should be horizontal when the sensor is nulled (no hydraulic flow in either direction). The exact null position for each sensor must be set with the engine running, after the sensor is installed, by using a screwdriver inserted into the slot in the sensor shaft to turn the shaft until there is no movement of the appropriate cylinder. The counterweight arm can then be installed tightly on the shaft.

The machine is shipped from the factory with the elevation sensors already plumbed into the HYDRA-MATION System so that the elevation sensors control the appropriate elevation cylinders for proper machine operation. The sensor hoses should never be disconnected unless necessary for repair of system components.

Sensor Supports

The sensor support assemblies each consist of a sensor support arm, a crank mounting bracket, a crank and a sensor mounting bracket which fit together as shown in the illustration above. The support assemblies mount to the mainframe on each side of the machine.

Wheel Reference Mounted on the Cutter Housing

The wheel reference assemblies each have a bracket, two link bars, a caster, a rod holder and a reference rod with an offset in it (see next page). When it is necessary to keep the clearance required for the sensors and wheel references to a minimum (see page 4-11) the left bracket may be bolted directly to the cutter housing and the right bracket may be bolted directly to the extension. For convenience when clearances are not critical, the brackets may also be bolted to the averaging ski guides (see page 4-13). The extension is hinged so that the cutter belt guard can be opened without unbolting the bracket.

The sensor shafts must point away from the machine, the arrow on each sensor shaft must point up and the feeler rods must extend horizontally toward the rear of the machine so that they rest in the reference rods.

Wheel Reference Mounted on the Mainframe

This elevation reference arrangement requires the least amount of clearance at the side of the machine of any of the reference arrangements.

The wheel reference assemblies each have a bracket that bolts to a support held in a square tube welded to the mainframe (see next page). The assemblies also each have two link bars, a caster mount bracket, a caster, a rod holder and a straight reference rod.

The sensor shafts must point toward the machine, the arrow on each sensor shaft must point up and the feeler rods must extend horizontally toward the front of the machine so that they rest in the reference rods.

MAXIMUM DEPTH OF CUT: 6 INCHES

FRONT LEG ELEVATION REFERENCE: WHEEL MOUNT

RIGHT REAR LEG ELEVATION REFERENCE: WHEEL MOUNT

MINIMUM CLEARANCES REQUIRED FOR OPERATION WITH WHEEL MOUNT REFERENCES MOUNTED ON THE CUTTER HOUSING

MAXIMUM DEPTH OF CUT: 6 INCHES

FRONT LEG ELEVATION REFERENCE: WHEEL MOUNT

RIGHT REAR LEG ELEVATION REFERENCE: WHEEL MOUNT

MINIMUM CLEARANCES REQUIRED FOR OPERATION WITH WHEEL MOUNT REFERENCES MOUNTED ON THE MAINFRAME

Averaging Ski Reference (Optional)

The optional averaging skis must be mounted so that the beam does not touch any part of the machine except the rear leg yoke and the guide. The rear of the beam can be moved in or out by loosening the bolts in the retainers, moving the beam and retainers and then tightening the bolts and locknuts.

The sensor shaft must point away from the machine, the arrow on the sensor shaft must point up and the feeler rod must extend horizontally toward the rear of the machine so that it rests in the reference rod.