Location
1 | Hydraulic pump |
2 | Valve block |
3 | Expansion reservoir |
4 | Oil reservoir cooler module |
5 | Hydraulic motor (right) |
6 | Hydraulic motor (left) |
A | High pressure pipe |
A1 | High-pressure line (left) |
A2 | High-pressure line (right) |
B | High pressure pipe |
B1 | High-pressure line (left) |
B2 | High-pressure line (right) |
S1 | Suction pipe |
S2 | Control line |
S3 | Leak oil line |
S4 | Return flow pipe |
S5 | Return flow pipe |
S6 | Supply line |
S7 | Return flow pipe |
T6 | Supply line |
W55.90-1098-76
W55.90-1104-78
1 | Hydraulic pump | A2 | High-pressure line (right) | S3 | Leak oil line | ||
4 | Oil reservoir cooler module | B | High pressure pipe | S4 | Return flow pipe | ||
5 | Hydraulic motor (right) | B1 | High-pressure line (left) | S5 | Return flow pipe | ||
6 | Hydraulic motor (left) | B2 | High-pressure line (right) | S6 | Supply line | ||
A | High pressure pipe | S1 | Suction pipe | S7 | Return flow pipe | ||
A1 | High-pressure line (left) | S2 | Control line | T6 | Supply line |
W55.90-1105-78
2 | Valve block | B | High pressure pipe | S4 | Return flow pipe | ||
A | High pressure pipe | B1 | High-pressure line (left) | S6 | Supply line | ||
A1 | High-pressure line (left) | B2 | High-pressure line (right) | S7 | Return flow pipe | ||
A2 | High-pressure line (right) | S2 | Control line |
Task
W55.90-1099-79
1 | Hydraulic pump | A1 | High-pressure line (left) | S3 | Leak oil line | ||
2 | Valve block | A2 | High-pressure line (right) | S4 | Return flow pipe | ||
3 | Expansion reservoir | B | High pressure pipe | S5 | Return flow pipe | ||
4 | Oil reservoir cooler module | B1 | High-pressure line (left) | S6 | Supply line | ||
5 | Hydraulic motor (right) | B2 | High-pressure line (right) | S7 | Return flow pipe | ||
6 | Hydraulic motor (left) | S1 | Suction pipe | T6 | Supply line | ||
A | High pressure pipe | S2 | Control line |
The hydraulic lines connect the individual system components to form a closed hydrostatic drive system.
The suction line (S1) is used to supply the hydraulic pump (1) with hydraulic fluid from the oil reservoir cooler module (4).
Hydraulic fluid is pumped through the high-pressure lines (A, B) by the hydraulic pump (1) into the valve block (2).
The valve block (2), when requested, routes hydraulic fluid through the corresponding high-pressure lines (A1, A2, B1, B2) to the hydraulic motors (5, 6) and back again.
Overflowing hydraulic fluid is routed through the leak oil lines (S3) into the oil reservoir cooler module (4) again.
The return lines (S4, S7) route hydraulic fluid that is not required from the valve block (2) to the hydraulic pump (1) or to the oil reservoir cooler module (4).
Hydraulic fluid that is not required is pumped through the hydraulic pump (1) over the return line (S5) into the oil reservoir cooler module (4).
The hydraulic pump (1) supplies the valve block (2) with control pressure through the supply line (S6).
The control pressure is routed over control lines (S2) into the hydraulic motors (5, 6).
The hydraulic fluid between the expansion reservoir (3) and the oil reservoir cooler module (4) is balanced through the supply line (T6).
Body
The high-pressure lines (A, A1, A2, B, B1, B2) have the greatest pressure load. They are designed for an operating pressure of approx. 420 bar and have a corresponding contingency reserve. Their burst pressure is approx. 1640 bar.
The suction line (S1) is designed for an operating pressure of less than 1 bar absolute.
The leak oil lines (S3) are designed for an operating pressure of approx. 26 bar.
The remaining pressure lines, that are not directly involved in drive, have an operating pressure of approx. 30 bar, the burst pressure here is approx. 120 bar.