1. The two-wheel drive tractor-mounted backhoe loader is usually capable of doing more work, or better work, than is demanded of it. 2. The key to getting greater productivity out of the machine is simply efficient operation. 3. A backhoe offers the maximum digging effort when the dipperstick is perpendicular to the boom, so this is the proper boom-to-dipper stick angle to use when opening a trench or performing other difficult digging operations.
4. For fast digging, the bucket teeth must be directly in line with the crowd. 5. In this position, the teeth lead the bucket through the ground, and the digging effort required is far less than when the teeth are pointed down or up.
6. An experienced operator can save seconds from this cycle time in a number of ways. 7. His cycles are smooth. 8. There are no right-angle moves in raising the bucket from the trench, moving to the spoil pile, dumping and returning to the trench. 9. If you watch closely, youll notice he does this operation in the form of the figure-8 motion.
10. Backhoes are used for many purposes besides this standard trenching operation. 11. Excavating for underground tanks, for example, is a common backhoe application. 12. And again, advance planning can save considerable time and effort and avoid unnecessary repositioning of the backhoe.
13. Backhoes are frequently used for lifting objects and for positioning them in the excavation. 14. They can be extremely useful in this application and often save bringing a crane to the jobsite. 15. It should be remembered, however, that backhoes are designed as digging units, and the hydraulic and geometric advantages of the design are directed primarily toward digging forces rather than lifting forces. 16. Stability is an important factor to consider when using the unit as a crane, particularly when the load is extended outward or swung to one side. 17. The load should be carried as close to the ground as possible when the backhoe is being moved and all movements of the load should be done smoothly.
Remember the words:
wheel, drive, mount, capable, efficient, offer, effort, dipperstick, boom, angle, perform, bucket, require, save, move, dump, backhoe, application, considerable, excavation, jobsite, design, advantage, load, side, smooth.
Note in the text:
1. Comparative degree. 2. Subject and predicate. 3. ing-forms, is (function). 4. Modal verb. 5. Subject and predicates. 8. Gerund. 12. Modal verb. 14. Subject and predicate. 15. Modal verb, participle II (function). 16. Infinitive (function); participle II (function); predicates (tense).
