Valve Block (Pick-Up And Shredder Drum) - Claas QUANTUM 3500 Service Parts

Hydraulics
3.6

Valve block (pick-up and shredder drum)

Key to diagram
Function
Pick-up raise
Lower pick-up and floating
position
Pick-up On
Pick-up Off
Shredder drums On
Shredder drums Off
11-58
QUANTUM
1 3/2 way pick-up drive On solenoid valve
2 3/2 way pick-up drive Off solenoid valve
3 3/2 way lower pick-up solenoid valve
4 3/2 way raise pick-up solenoid valve
15 3/2 way shredder drums drive solenoid valve
16 3/2 way shredder drums drive Off solenoid valve
33 Shredder drums drive hydraulic cylinder
34 Pick-up drive hydraulic cylinder
A Working cylinder
P Pump port (feed line)
T Tank port (return line)
See also hydraulic system circuit diagram
The solenoid valves 14 and 4 are activated.
The pressure balance 20 assumes the closed condition. Oil flows from P1
to the hydraulic cylinders 35 via the activated solenoid valve 4 and the
deactivated solenoid valve 3.
The pick-up is raised.
When solenoid valve 4 is switched off, the oil is trapped in the cylinders
by solenoid valve 3. The pick-up position is thus maintained.
Solenoid valve 3 is activated.
Oil flows back to T1 from hydraulic cylinders 35 via the deactivated
solenoid valve 4.
The pick-up is lowered.
In floating position, solenoid valve 3 remains activated.
Solenoid valve 1 is activated.
Oil flows back to T1 from hydraulic cylinder 34 via the deactivated
solenoid valve 2.
The pick-up is switched on.
Solenoid valve 2 is activated.
Oil flows to hydraulic cylinder 34 from P1 via the deactivated solenoid
valve 1.
The hydraulic cylinder is extended and the pick-up is switched off.
Solenoid valve 15 is activated.
Oil flows back to T1 from hydraulic cylinder 33 via the deactivated
solenoid valve 16.
The shredder drums are switched on.
Solenoid valve 16 is activated.
Oil flows to hydraulic cylinder 33 from P1 via the deactivated solenoid
valve 15.
The hydraulic cylinder is extended and the shredder drums are switched
off.
TIC
10/04