Agromehanika AGT 850, Инструкция по эксплуатации

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INSTRUCTIONS FOR USE
AGT 850 / 860
37
Seat properties:

Seat automatically adjusts to driver's weight (from 50 to 120 kg);

Suspension system travel is 100 mm;

Seat position can be set vertically up to 80 mm (height).

Seat position can be set horizontally up to 150 mm (length).
4.4 DESCRIPTION OF HYDRAULICS
The main element of hydraulics, through which all hydraulic elements are supplied, is the hydraulic
pump, which is connected directly to the engine and connects two independent systems:

The first system supplies elements for lifting and, through control elements, additional distributors
or implements.

The second system supplies tractor steering and, through control block, performs differential lock
and engaging of connection shaft (hydraulic clutch).
Hydraulic pump pumps oil from the rear part of transmission (gearbox housing) through filter into control
elements.
Hydraulic control is consisted of:
1. Control block ; its task is to engage and disengage the drive shaft (PTO) and block differential
through electro-hydraulic valves;
2. Hydraulic pump ; required pressure for operation of hydraulic system is supplied by two
independent pumps:
a. Work pump for rear hydraulics (first system), capacity 11 cm
3
, with max. 31 l/min flow at
2800 rev./min., and pressure 230 bar.
b. Pump, connected to steering head (second system), capacity 8.5 cm
3
, with max. 24 l/min
flow at 2800 rev./min., and pressure 230 bar.
3. Steering cylinder or steering block ; intended for steering the tractor left or right;
4. Four-way directional valve ; four-way directional valve automatically changes direction of
operation of steering cylinder in opposite direction, when turning the seat for 180°.
5. Cylinder housing ; together with belonging elements, blocks both, first and rear, differentials;
6. Control elements ; intended for lifting or lowering rear hydraulics or activation of quick couplings
(implements);
7. Filter ; prevents oil particles to enter the pump and is installed on the suction line between the
pump and gearbox housing;
8. Connection shaft ; connection shaft is engaged by multiple disc clutch in oil bath, which is
independent and separated from main clutch operation;
9. Quick coupling (implement) ; optionally, the tractor can be fitted with many quick couplings, at
customer's request;
10. Choke ; intended for soft start or prevents sudden thrust of connection shaft when activating
solenoid valve. Choke operation is described in chapter "START CHOKE (SOFT START –
PTO)".
IMPORTANT: Choke must always be open during operation!