Évaluations - 5, GPA: 3.2
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Facilité d'utilisation
Store lockpins in holes provided in operator platform. 2. OPERATE from the backhoe operator’s seat only. 3. LOWER the stabilizers until the rear of the tractor is totally supported by them. NOTE: rear tires should not come up off of the ground. See diagram on Page 11. 4. DO NOT dig near the stabilizers. 5. DO NOT touch overhead wires with any part of the backhoe. 6. DO NOT attempt to raise the tractor off the ground or move the tractor forward or backward using the backhoe dipperstick or bucket. 7. DO NOT lose stability by swinging the bucket downhill when positioned on a slope. 8. DO NOT lower the backhoe boom using the “float” function. It will freefall, and could result in injury to bystanders or damage to the backhoe. 9 Location: Back Of Control Panel It is not difficult to become an efficient operator. Control lever operating decal is located on back of the control panel. Study this decal. It will assist you in becoming familiar with the controls. Smooth, light handling of the controls will result in the most efficient backhoe operation. Operate the backhoe control levers to become familiar with their speed and movements. The engine speed and the size of the hydraulic system will determine the speed of cylinder operation. When powering from tractor systems with higher output than required, reduce engine RPM to obtain acceptable backhoe operating speed. Swing the boom several times to practice controlling the speed of swing. Do not operate the swing more than 45° each way for the first few times, then gradually increase the arc. IMPORTANT: To avoid damage to the backhoe, do not slam swing unit into the rubber bumpers. The boom “float” function may be used during digging to eliminate down pressure when cleaning the bottom of a trench. The primary purpose of the boom “float” function is to protect the operator from serious injury in the event that the backhoe or tractor hitch would fail. Best results are obtained by digging near the center of the swing arc so material can be dumped on either side. As the operator becomes more familiar with the operation of the backhoe, it will be common practice to operate two controls at one time. For example; with the bucket extended and the dipperstick extended, the lift control and crowd control can be operated together to bring the bucket toward the operator with down pressure on it. As the dipperstick approaches the operator, the crowd and bucket controls can be operated to close the bucket and trap the material. At the end of the stroke, the lift and crowd controls are operated to move the load up and away from the operator to save time in clearing the excavation. This dual operation of controls will speed and simplify the digging operation. Normally the two or more movements will not be equal or even simultaneous, but as the pressure within the cylinders changes, and the resistance on an operating member of the hoe lessens, it will begin to move. It is balancing the force of one member against the other. NOTE: Actuating the bucket is the key to powerful digging. Operating the crowd and bucket controls simultaneously will insure a full bucket and prevent waste motion and time. Transporting the Backhoe: IMPORTANT: To prevent serious damage to the tractor, read and follow the instructions on the following decal: Location: Right Side of Boom 10 CAUTION To avoid possible injury, observe the following safety rules when transporting the backhoe: 1. ALWAYS engage safety locks as shown on Figs. 1 and 3 when transporting backhoe. 2. TRAVEL SLOWLY over rough terrain, on hillsides, and around curves to prevent tipping. 3. DO NOT drive the tractor near the edge of a ditch or excavation. 4. USE accessory lights and SMV emblem when traveling on highways. Before leaving backhoe operator’s seat, position the backhoe for transport by raising boom, crowding dipperstick in, swinging to center and raising the stabilizers. When transporting for long distances, periodically examine the backhoe and raise stabilizers and bucket back up to the full transport height. It is normal for the backhoe to slowly settle while being transported. WHEN TRANSPORTING CAUTION Figure 4 DO NOT CHAIN BACKHOE DOWN IN ORDER TO SECURE TRACTOR TO TRAILER Note: Bucket should be lowered to bed when possible. DO NOT attach hold down chains anywhere on backhoe assembly. Block and secure tractor only. Placing the Stabilizers Decreased Digging Depth Narrower Stabilizers Properly Positioned Stabilizer Stabilizers Improperly PositionedPlatform Set the stabilizers to remove weight from the rear wheels. The wheels are to remain touching the ground as this provides for the widest stabilizer stance and the lowest center of gravity. Raising the wheels off the ground will not only reduce stability and digging depth, but will impair performance and impose unnecessary stress on the unit. 11 General Operations FILLING THE BUCKET Control the bucket attitude throughout the digging cycle to keep teeth at the proper angle for best ...
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