Do NOT attempt to clamshell objects too large
to handle, because this may damage both the bucket and
linkage (fig. 9-36).
BACKHOE OPERATIONS
The backhoe attachment shown in figure 9-37 is
used to dig hard material because of the positive
pressure created by the hydraulic system. Its digging
depth is limited by the length of the boom and dipper
stick. The backhoe dumps the material into trucks to be
hauled away or into piles alongside the excavation to be
used as backfill material. Its dumping range is also
limited to the length of the boom and dipper stick.
515 Dresser Backhoe
The 515 dresser backhoe attachment couples easily
to the front of the loader frame, using hydraulic
controlled pins and quick- disconnect hydraulic fittings.
The procedure for setting up the backhoe attached to the
515 dresser is as follows:
Figure 9-36.-Attempting to pickup objects too large for the
clamshell.
1. After the backhoe has been coupled to the front
of the front-end loader, raise the boom arm until the
Figure 9-37.-Backhoe attachment.
9-14
