Unimog U500, Инструкция по монтажу

Страница: 197 / 292

Body and Implement Mounting Guidelines U500 North America Hydraulic system
Page 200 of 294 August 2005
6.2.1 Information to the basic hydraulic system
Note: Care should be taken when connecting implements to
circuit 1 to ensure that implements cannot be connected
to the same
cell (color) at the front and side. Each dou-
ble acting cylinder may only be connected to one cell
(color), so that its actuation is analogous with the move-
ments of the operating unit (lifting: pull hydraulic actuat-
ing lever, lowering: push hydraulic actuating lever).
A cell indicates the hydraulic valve (Example: Connections 3
and 4 are pressurized by a cell, the connections on a cell always
have the same color!)
6.2.1.1 Hydraulic pumps of circuit 1 and circuit 2
Hydraulic
system
Hydraulic pump data
Single circuit
Casappa gear pump; 16.6 cm
3
/turn;
driven via belt by the engine
Dual circuit
Circuit 1: Casappa gear pump;
8.3
cm
3
/turn; 0.506 cu in/turn
driven via belt by the engine
Circuit 2: Casappa gear pump;
16.6
cm
3
/turn; 1.013 cu in/turn
driven via belt by the engine
Table 6.5: Hydraulic pumps of circuit 1 and 2
6.2.1.2 Hydraulic control unit
Electrically controlled 4/3-way valves with neutral settings, two
pressure settings and float setting are used for circuits 1 and 2.
Circuit 1 can be equipped with up to 4 double-acting valve cells
(optionally black/white or proportionally controlled). These valve
cells with their possible settings can be used for the functions:
Lifting, lowering, neutral and floating setting.
The hydraulic circuit 1 can also be equipped with up to 8 con-
nections at the front and up to 4 connections at the rear of the
Unimog.
6.2.1.3 Dual circuit hydraulic system
The flow rates of circuit 1 and circuit 2 can be easily switched
with the hydraulic control unit in the cab. For example, imple-
ment-actuating speeds can be accelerated by use of the higher
flow rate of circuit 2.
It is also possible to combine the flow rates of circuit 1 and cir-
cuit 2, but the consumer must be connected to circuit 2. If com-
bined flow is enabled, there will be no oil flow available on circuit
1 connectors.