1
General
Introduction
This Operating Manual contains basic information
necessary for the operation and maintenance of the
W12E winch.
How the Winch Operates
A winch is normally installed on a skidder or tractor:
• to increase the pulling power of the skidder or tractor.
• to reach into an area where a skidder or tractor cannot
go.
• to make lift functions available when special attachments
are installed.
The winch has hydraulic clutches that are similar to a
hydraulic (powershift) transmission. Most tractors and
skidders have a power take-off (PTO) that is used to
connect the power from the engine to the winch. The
SCH
(Self Contained Hydraulics) on the winch label
indicates that the hydraulic system for control of the winch
is inside of the winch case. When the PTO is operating,
a hydraulic pump in the winch case takes hydraulic oil
from the winch sump and sends it to the hydraulic control
valve. The hydraulic control valve controls the operation
of the winch. Removable covers on the winch case allow
access for repairs and adjustments. The design of the
winch cases permits a variation in the arrangement of
PTO assemblies to fi t the different tractors and skidders
that use these winches.
The PTO is connected to the pinion assembly in the winch.
When the pinion rotates, a ring gear (bevel gear) rotates
the shaft and pump gear, which turns the pump. The bevel
gear is connected to an oil clutch for the
LINE-IN
(power
forward) operation and another oil clutch for the
LINE-OUT
(power reverse) direction.
The power through the winch to the drum for the wire
rope is controlled by a
LINE-IN
and a
LINE-OUT
clutch.
When the
LINE-IN
clutch is applied, the drum rotates to
pull the wire rope into the winch. When the
LINE-OUT
clutch is applied, the drum rotates to permit the wire rope
to be pulled from the winch at the speed controlled by the
engine rpm.
General
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: ......
