Belarus 1523, Руководство по эксплуатации

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BELARUS-1523/1523 В /1523.3 /1523В.3 Construction and Operation
150
The “BOSCH” Integrated Block is
composed of a spool valve-type hydrau-
lic distributor (3) for controlling the exter-
nal hydraulic cylinder and regulator (2)
for electromagnetic control of the HLL.
The Hydraulic Distributor
(3) is of
three-section, four-position through-type
and manufactured by the BOSCH Com-
pany. The spool valves of the 2
nd
and 3
rd
sections can be fixed in the “Neutral” and
“Floating” positions. The spool valve of
the 1
st
section is fixed in the “Lift” posi-
tion. It is provided with an automatic re-
turn mechanism from the “Lift” position to
its “Neutral” position on reaching the pre-
set pressure.
1 – high-pressure pipeline; 2 – controller EHR-23 LS
*
; 3 – hydraulic distributor; 4 –
spool valves (adapters); 5 – control cables; 6 – bracket; 7 – control levers; 8 – hydraulic
cylin der Ц90х250 (2 off); “I” – 3rd spool valve lever; “II” – 2
nd
spool valve lever; “III” – 1st
spool valve lever.
*
Or independent controller EHR4.
The outlet holes of distributor sections
are used for connecting the rear leads of
the hydraulic system; when a front hitch
linkage is installed, the hydraulic cylin-
ders are fed from the middle section of
the distributor using high-pressure hoses
(HPH).
The control of the distributor spool
valves is exercised by means of double-
acting cables (5) ensuring the control of
the spool valves of the distributor (4)
through the control levers (7) located in
the panel to the right of the operator’s
seat. Cable braiding is secured with nuts
on the bracket (6) on the one side and in
the distributor (4) adapters on the other
side.
Shifting the lever from its
“neutral” (Н)
position forward in the direction of the
tractor travel sets the spool valves to the
“drop” and “float” positions while pulling
the same rearward – to the “lift” position.
Electrohydraulic Unit (РП70 + ЕНРНС1 - ОС)