Conduct Hydraulic Excavator Operations RIIMPO301E
Study Guide Version 1.01
Contents Section 2: Operate Hydraulic Excavator .............................................................................................. 4 Faults and Defects .....................................................................................................................................5 Bucket Fill ..................................................................................................................................................6 Bucket Fill Technique ............................................................................................................................6 Floor Level .................................................................................................................................................7 Maintaining Floor Level with Bucket .....................................................................................................7 Floor Level Clean Up..............................................................................................................................7 Payloads ................................................................................................................................................8
Section 2: Operate Hydraulic Excavator This unit describes a participant’s skills and knowledge required to conduct hydraulic excavator operations in Coal and Metalliferous mining and Extractive. This unit is appropriate for those who work in operational roles.
Mapped to: RIIMPO301E Conduct Hydraulic Excavator Operation
Faults and Defects Do not operate the excavator if it is in an unsafe condition. You should aim to improve the general appearance, mechanical standard, and operating efficiency by: -
Carrying out walkaround inspections and pre-start checks.
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Detailed and conscientious reporting of defects.
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Ensuring all servicing is carried out as scheduled.
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Operating the excavator within its limits in a safe manner.
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Keeping the excavator clean.
You must perform frequent pre-operational and operational checks and inspections on the excavator. The purpose of these inspections is to discover and locate defects at an early stage before they become significant problems that may cause injury and equipment or environmental damage. Operational checks involve determining the operational status by monitoring items such as: -
Temperature gauges.
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Fluid level gauges.
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All controls and switches.
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Pressure gauges.
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Alarms and indicator lights.
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Hydraulic system.
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Hydraulically driven components.
You are responsible for some aspects of preventative maintenance. You are required to ensure that all preventative maintenance is carried out as scheduled, including walkaround inspections. A clean, wellordered work environment is not only more pleasant to work in, but safer for all personnel. To make a personal contribution, follow the guide below: -
Clean as you go. Remove any spillage of oil, grease, or other materials as soon as practicable. Do not allow rubbish and waste to accumulate.
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Return equipment and materials to their proper places as soon as you have finished with them.
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Discard used oil, filters, seals, gaskets, oil-soaked rags, and packaging as you finish with them into the correct receptacles.
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Use the oil trolleys provided to catch drain oil not evacuated via the normal waste oil network, such as in the case with axle housings and final drives.
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The same housekeeping rules should be applied to the operator cab. A good rule is to leave the cab as you would want to find it. Clutter and litter are not only unsightly, but it can also be dangerous as it may: -
Be a fire hazard.
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Interfere with operation/controls.
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Cause additional injuries during accidents, rollovers, or other incidents.
You are also responsible for ensuring attachments and ancillary equipment are clean and in good condition after use. Defects or faults will occasionally be noticed during walkaround checks or other activities. If the problem is such that the equipment is unsafe to operate, you must attach an Out of Service Tag to the appropriate position to ensure that either the faulty component or the whole machine (as applicable) is not operated. In all cases, you must ensure that the defect/fault is either repaired or reported by filling out a defect report and then forwarding it to the maintenance department.
Bucket Fill Every bucket must be filled to its limits. Having the bucket in the ideal position will assist in keeping optimum penetration and allow for Maximum Mechanical Advantage (MMA). Ensure the bucket is positioned to dig for maximum break out and penetration through the material. If the Bucket’s position is too far out, it is hard to keep a level floor and time consuming to then correct the bucket to Maximum Mechanical Advantage (MMA). By having the bucket in the ideal position for filling, the action of lifting and carrying material to the truck will have minimal to no spillage. The bucket’s teeth should come into direct contact with the toe of the bench when commencing a dig. The dipper arm should be brought in no further than a 90° angle. The boom will then lift the bucket up and out of the bench while filling the bucket.
Bucket Fill Technique -
Maximum achievable bucket fill is a very important technique necessary for production as an Excavator operator. Failing to achieve the maximum bucket fill greatly impacts on the number of cycles required to fill a dump truck to capacity. Additional cycles reduce overall productivity.
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The bucket’s teeth should come into direct contact with the toe of the bench when commencing a dig.
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The lip of the bucket and teeth must be positioned at the correct cut and fill bucket angle before reaching the inner most point that the bucket penetrates the bench.
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Maximum achievable bucket fill is a very important technique necessary for production as an Excavator operator. Failing to achieve the maximum bucket fill greatly impacts on the number of cycles required to fill a dump truck to capacity. Additional cycles reduce overall productivity.
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The bucket’s teeth should come into direct contact with the toe of the bench when commencing a dig.
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The lip of the bucket and teeth must be positioned at the correct cut and fill bucket angle before reaching the inner most point that the bucket penetrates the bench.
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Having the correct cut and fill bucket angle will assist in maintaining the maximum achievable bucket fill when the bucket breaches the bench
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The dipper arm should be brought in no further than a 90° angle and the bottom of the bucket should not drag when filling.
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Every bucket must be filled to the Excavator’s achievable limits subject to the type of material being excavated.
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Having the bucket in the ideal position for and after filling allows for minimal to no spillage when slewing to the Dump truck.
Floor Level Maintaining Floor Level with Bucket Floor Level Clean Up The dozer needs to make positive communications with the Excavator and Dump truck operators before commencing clean-up. The Dozer should work in conjunction with the Excavator to avoid stopping the Excavator as to maintain a high level of efficiency. When the Dozer is cleaning up along the bench, it should push the material towards the Excavators bucket as it digs into the face and then reverse out before the excavator’s bucket leaves the dig face. After the Excavator has completed the cut, any material remaining from the clean-up must be pushed up into the dig face as displayed.
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The Excavator operator may also instruct the Dump truck operator to park in queue while the Dozer operator completes the clean-up, in doing so the Dump truck operator must remain stationary until instructed to position for loading.
Payloads Correct payload occurs when loading to the target payload and the position of the load is central in the tray.
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