Long 460 - HYDRAULIC LIFT AND CONTROL SYSTEMS; Hydraulic Lifter and Position Control

The lifter can operate in either of the two following ways:
1.
On position control: move selector lever downwards (fig. 25) and lock top
link support (fig. 26).
Position control enables the
operator to u~e the tractor-attached implement
in any posit ion in or above the ground according to the range he is setting the
hydraulic control valve control lever. Moving the lever up, the imple ment will
F ig. 25 F ig. 26
lift up and moving the lever down, the i mplement will go down. The amount of
lifting and
lowering is proportional to lever travel.
Position control is used for carried implements without land wheel or any
support that vary their working depth (bulldozer, scraper, hoe) or implements
working above the ground and havi ng a land wheel or support (i.e. manure
spreader, seed
drills , mowers).
Float use
The use of float frees the lower links completely allowing uncontrolled move-
ment. In this case the lift is used
only to raise and lower the implement at the '~
beginning and end of the operation, while during work it must be kept in the
lowest position. Float is used
for implements which must simply rest on ground
and
follow its contours ( for example: tamping rollers, spreaders, mowers) and
semi-trailed
implements , wh ich during transport are carried completely by the
tractor , but which during work rest upon the ground (for example: manure
spreaders, weeders, sowers).
2. On draft control: move selector lever upwards (fig. 25) and release top link
su pport (fig. 28).
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