Allied Systems AW3CP1A1556R11, Руководство по эксплуатации

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Operational Differences, Optional Equipment
Integral Arch
When using an integral arch, the wire rope passes over
a raised horizontal roller and between a set of smaller
vertical side rollers and an upper horizontal roller. This
causes the winch to pull upwards on loads. In this way the
load can be lifted slightly to reduce drag due to ground
contact. The side and top rollers act as fairleads to protect
the wire rope from damage and from damaging the frame.
Because of the line of action of the wire is higher than
normal, the tipping moment applied to the tractor is
increased, and the tractor will tip backwards at signifi cantly
lower line pulls. The operator must exercise care to not
pull more than the tractor can handle stably, especially
on side slopes.
Line pulls through the arch also exert higher loads on the
fasteners holding the winch to the tractor. For this reason,
the wire rope diameter is limited.
Fairlead
A fairlead consists of a set of top and bottom horizontal
rollers and side rollers that the wire rope passes between.
With this attachment, if the direction of line pull is not within
the small window of the fairlead, then the wire rope is
pulled across one of the fairlead rollers instead of across
the frame, thus protecting both the frame and the wire
rope from excessive wear.
Stability of the tractor is affected somewhat by the fact
that the fairlead rollers are more rearward than the drum,
thus putting slightly more moment on the tractor during
side pulls. The operator must take care to assure stability
on slopes.
Operational Differences, Optional Equipment