Do NOT attempt to clamshell objects too largeto handle, because this may damage both the bucket andlinkage (fig. 9-36).BACKHOE OPERATIONSThe backhoe attachment shown in figure 9-37 isused to dig hard material because of the positivepressure created by the hydraulic system. Its diggingdepth is limited by the length of the boom and dipperstick. The backhoe dumps the material into trucks to behauled away or into piles alongside the excavation to beused as backfill material. Its dumping range is alsolimited to the length of the boom and dipper stick.515 Dresser BackhoeThe 515 dresser backhoe attachment couples easilyto the front of the loader frame, using hydrauliccontrolled pins and quick- disconnect hydraulic fittings.The procedure for setting up the backhoe attached to the515 dresser is as follows:Figure 9-36.-Attempting to pickup objects too large for theclamshell.1. After the backhoe has been coupled to the frontof the front-end loader, raise the boom arm until theFigure 9-37.-Backhoe attachment.9-14
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