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Hydraulic Excavators (Tracked andWheeled)
Hydraulic excavators (tracked and wheeled) are often
found in MRF, Sorting and Transfer stations either as
a primary or secondary tool for loading haul vehicles/
conveyors/hoppers, tamping and finishing off loads,
and sorting materials. Fast cycle times are the primary
advantage of an Excavator over a Wheel Loader. Wheeled
excavators come with a maneuverability advantage espe-
cially in tight loading and stockpiling areas. Depending
on the type of application, tracked and wheeled excava-
tors would be equipped either for high production loading/
compaction, or with sorting/separating tools for recovery
of recyclable materials.
Again, keeping the Task, Tool, Machine concept in
mind, you should take into account the following when
sizing a tracked or wheeled excavator. Type of material
and density, tonnage, work load for the machine, ceiling
height, work area/swing area, floor size, along with
maneuverability needed, ability to ‘see’ into haul vehicles
or down into the floor load out area (cab risers), and
reach. Special guarding packages, radiators, and revers-
ing fans are options that may be needed to meet the most
demanding needs.
Track-TypeTractors
Waste Handling Track-Type Tractors are designed,
guarded, and built in factory so that they can accom-
modate all waste applications. Although its primary
use is for pushing and layering the waste and cover mate-
rials in landfills they offer alternative waste movement
and volume reduction in large transfer stations and
C&D transfer stations. Ex: In surge pit operations where
waste is tipped into a level below the tipping floor. Track-
type tractors will push, layer, and compress/shred the
material during operations and push into a haul vehicle.
This method is used when maximum volume reduction
is required or peak rate of waste exceeds available floor
space.
Track Loaders
Waste Handling Track Loaders are designed, guarded,
and built in factory so that they can accommodate all
waste applications. Transfer stations are a strength for
this machine due to its versatility in this application.
Sorting, pushing, layering, and compaction are all part
of typical operations within the transfer station applica-
tion. Just like the track-type tractor, the track loader is
used in higher tonnage transfer stations, C&D transfer
stations, and when waste needs volume reduction.
Equipped with a multi-purpose bucket, the track loader
can sort, push, layer, compress and shred, and load
material into outbound haul vehicles.
Landfill Compactors
Although landfill compactors are designed for spread-
ing and compacting large volumes of material in a land-
fill environment, in some instances, transfer stations
might have a large enough working area to allow the
compactor to be utilized to reduce waste volume prior
to loading into haul vehicles. They offer two advantages
in this type of application.
1. They are configured and guarded to work in this
type of environment.
2. They achieve higher compression, shredding, and
compaction levels compared to other machines.
CAUTION! Operating a landfill compactor, track-
type tractor, or track loader on a concrete floor could be
counterproductive due to floor wear and maintenance
costs. Always keep a layer of waste between the floor
and machine until final movement of the day. Wheel
loaders and/or excavators (wheeled/tracked) should be
used to support these machines. (Please see #4 under
previous Equipment Selection.) (It is not recommended
to use a landfill compactor larger than the 826.)
WorkTools for Material Recovery Facilities,
Sorting andTransfer Stations
As described in the opening statements of this section,
the waste stream can consist of many different types of
materials sometimes all blended together. For that rea-
son, work tools become a very important part of moving,
sorting, and dozing in waste applications.
At the end of this section, there will be a Work Tool
section and chart discussing possible tools to use. Please
contact your dealer/regional waste representative for more
information.
Edition 47 21-7
Waste Handling
MRF’s, Sorting and
Transfer Stations
Equipment Selection