Zetor 8621 Forterra turbo, Operator'S Manual

Page: 114 / 315

114
HYDRAULIC SYSTEM
F 164 F 165
OUTER CIRCUIT CONTROL LEVER
Control lever has three positions marked on label.
a -
Pressure is in quick-coupler No "1", quick-coupler No "2" is connected with
return line. Lever is moved into its rear margin position. The lever must be
kept in this position otherwise it is automatically turned into neutral position
"b".
b - Neutral position (locked). Outlets of quick-couplers No "1" and "2" are closed
and the oil is blocked in attached hydraulic implement. The lever is
automatically kept by spring in this position.
c -
Floating (free) position. Both outlets of quick-couplers No "1" and "2" are
connected with return line and the oil can freely flow in both directions. Lever
is locked by valve ball lock in this position.
d -
Pressure in quick-coupler No "2", quick-coupler No "1" is connected with
return line. Lever is moved into its forward margin position. lever must be kept
in this position otherwise it is automatically turned into floating position "c".
CONTROL OF SINGLE-ACTING
HYDRAULIC CYLINDER
Single-acting hydraulic cylinder is ever
connected with quick-coupler No "1":
lifting
lever is in position "a"
(pressure in quick-
coupler No "1
„ )
lifting finished lever is moved to
position "b" - neutral
lowering lever is moved to
position "c" - floating
Lowering
finished lever is moved to
position "b"
“ neutral
Note: Picture F 165 shows location of
quick-couplers in basic configuration and
configuration with two section SCV.
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