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Secoroc Rock Drilling Tools Secoroc YT Series Rock Drill Secoroc YT29A Pusher Leg Rock Drill Operator's instructions / Spare parts list...
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Foreword Thank you for selecting the Secoroc YT29A pusher leg rock drill. These instructions were developed to help you get the best performance and productivity from the use of your new rock drill. Please refer to them also for correct maintenance of the machine.
Scope of application Secoroc YT29A is a heavy-duty pusher leg Rock Drill featuring high efficiency and low air consumption. It is primarily designed for drilling in mines, hydropower stations, and road construction projects. It is also a new product suitable for tunneling and other stone works in mining and metallurgical industry.
Safety instructions To reduce the risk of serious injury or death to yourself or others, carefully read through this instruction booklet before putting the rock drill to use. Always follow the instructions given. Always wear a safety helmet, goggles and ear protectors with CE mark during drilling.
Operation Using the rock drill for the first time When the rock drill arrives from the factory, the inside of the tool is coated with heavy oil to prevent corrosion. After unpacking and installing the tool, pour a small amount of lubrication oil into the air connection and operate the tool on partial throttle to clean the interior.
4. Air/water pressure and hose dimensions Air pressure Ensure that the compressor can deliver the required air pressure of 5 bar at the tool. High pressure (>6.3 bar) causes rough operation and damage. Low pressure (<4 bar) results in a slow drilling speed. Water pressure Make sure that the water pressure is set to around 3 bar.
Fitting the working tool 1. Push the retainer outwards in the direction of the arrow (see picture below), until the front portion of the retainer is able to accommodate the working tool collar. 2. Insert the drill in the chuck. 3.
Controls Throttle lever The rock drill is equipped with a throttle lever for regulating both the compressed air to the percussion mechanism and the flushing water. A. Extra blowing, water flushing off, impact and rotation off. B. Stop position, air and water off C.
Trigger When the trigger (A) is pushed in, the feed force stops abruptly and the setting on the feed control lever is overridden. The piston rod in the pusher leg retracts automatically. This function is used for example to adjust the height of the rock drill, when rigging up the pusher leg, or when there is a tendency to jam.
Drilling Starting the rock drill 1. Open the main valve for compressed air. 2. Open the cock for the flushing water. 3. Adjust the feed control lever to give a suitable feed force for collaring the hole. 4. Align the rock drill so that the working tool touches the desired collaring point. 5.
When you have finished drilling Run the rock drill at medium speed when retracting the working tool from the drilled hole. Lay down the rock drill on a stone, wooden plank or similar object, so as to prevent drill cuttings and other foreign matter from entering the chuck. Turn off the water pressure before the air pressure.
Once a week (after 40 hours of operation) Carry out a basic check of all functions of the drilling equipment. Once a month (after 200 hours of operation) Send the rock drill to a workshop for inspection. The local operating conditions will determine whether or not this is a suitable interval for overhauling the drill.
Trouble shooting Problem Cause Solution Decreased Air leakage in hoses, Change packings, and where penetration rate couplings required, change parts in the throttle valve. Shank sleeve Check the shank sleeve for excessive wear. Replace if necessary. Air leakage due to worn Replace the piston and/or cylinder piston/cylinder Air leakage due to worn...
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Problem Cause Solution Uneven running The side bolts are unevenly Check and repair any damage to (continued) or insufficiently tightened. the contact points and tighten the Can cause the various parts bolts with the correct tightening lose their alignment, torque resulting in the seizure of the movable parts.
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