Zetor Major 80, Operator'S Manual, Page: 72 / 157

72
HYDRAULIC EQUIPMENT
NM13N014
POSITION REGULATION OF REAR THREE-POINT LINKAGE HEAVE
Position regulation of rear three-point linkage heave is a means of regulation with which the tools connected in three-point linkage
is kept automatically at constant height (position) to tractor.
Shift lever (1) to front position (d). Perform vertical adjustment of rear three-point linkage with a lever (2) in (b) range. Height set-
ting is smooth in the range of 1-9. With number 1, there are three-point linkage arms in lower position, with number 9 in upmost
position. Position (c) is a transport position, in which tools connected in rear three-point linkage are heaved to maximum.
For transporting tools connected in rear three-point linkage always use position regulation.
After lifting tools to transport position, close oil flow through hydraulics to stop by turning the control of speed of three-
point linkage lowering (3) in the direction of an arrow. If tools hinged in three-point linkage cannot be lowered in transport
position, check the position of the speed of lowering control (3) – turn it against the direction of an arrow.
If tools hinged in rear three-point linkage are long and heavy, there can be blockage of three-point linkage arms in trans-
port position during transport. If lowering speed control (3) is permitted and still a tool it cannot be lowered, move the lever
(2) to floating position (c) for a short time and immediately return to the lowering range (d). The arms of rear three-point
linkage start dropping according to a set lever (2).