SRT45 Off-Highway Truck
5-2
Safety, Operation and Maintenance Manual
Ideally, the hydraulic excavator or rope shovel
should require 90o or less swing to dump
into the truck body for best loading efficiency.
Required turning and backing to position the
truck for loading should be held to a minimum.
A common loading method is to have trucks
travel a semicircle in the loading area. This
method eliminates all backing. Waiting
machines should stay about two truck lengths
behind the one being loaded to avoid any
spillage from the loading machine bucket or
truck body. The operator of the waiting truck is
also better able to judge the best spot for his
truck when it is his turn to be loaded(refer to
fig.5-4).
On some jobs, the loading machine might work
most efficiently when trucks are positioned
on both sides of the loader. Thus, while one
truck is being loaded, another can move into
position on the opposite side of the loader
and the loading machine can swing over to
load the next truck with a minimum of lost
time. Since the truck is usually backed into the
loading position with this method, the operator
must be alert and careful while backing(refer
to fig.5-5).
For fastest, most accurate loading when
being loaded by a front end loader, the truck
operator should spot his machine on the most
level area and at an angle to the face of the
bank or stockpile. This minimizes loader travel
time, particularly with a raised, full bucket.
Where possible, the truck should also locate
downwind of the loader when dusty-type
material is being loaded on a windy day. This
practice improves both working conditions and
visibility for the loader operator(refer to fig.5-
6).
A cleanup dozer or small loader is often
working in conjunction with the main loading
machine to keep the area clear of bucket
spillage for maximum efficiency of the loading
operation. The truck operator must always be
alert to the position of the cleanup machine
Fig 5.4
Fig 5.5
Fig 5.6
D u m p t r u c k s p a c e
is the length of two
dump trucks
Two-side loading
Working the Truck
