52
Operational Differences, Optional Equipment
Integral Arch
When using an integral arch, the wire rope is routed over
a raised horizontal roller and through a set of smaller
vertical side rollers and an upper horizontal roller. This
enables the winch to pull upwards versus horizontally 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 is fed through.
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.
Summary of Contents for W12E
Page 13: ...xi Safety Summary Notes...
Page 14: ...xii Notes...
Page 37: ...23 Figure 10 Operator Electronic Controls Operation Electronic Controls...
Page 51: ...37 Intentionally Blank Maintenance...
Page 55: ...41 Operating Techniques Power Controls Intentionally Blank...
Page 59: ...45 Operating Techniques Electronic Controls Intentionally Blank...
Page 65: ...51 Operating Techniques General Intentionally Blank...
Page 68: ...54 Notes...
Page 69: ......
