GF14.40-W-3012B | Overflow valve, component description | 26.10.05 |
ENGINE 457.9 in MODEL 940, 942, 943, 944 with CODE (MS4) BlueTec 4
ENGINE 457.9 in MODEL 940, 942, 943, 944 with CODE (MS5) BlueTec 5
W14.40-1209-06
Location
5 Compressed air control unit
7.03 Overflow valve (without return flow)
30.03 Valve pressure limiting valve
Y106 SCR air pressure limiter solenoid valve (33.01)
The overflow valve (7.03) is part of the compressed air control unit (5) and is located on the inside of the left longitudinal frame member at the height of the muffler.
Task
The overflow valve (7.03) opens the access to the compressed air ancillary consumer circuit 4 after a certain pressure has been obtained.
Design
1 Adjusting screw
2 Adjuster spring
3 Pistons
4 Diaphragm
5 Hole
6 Check valve
7 Hole
7.03 Overflow valve (without return flow)
A Connection (supply line)
B Connection (working line)
Function
The compressed air passes from the connection (A) into the housing of the overflow valve (7.03) and flows through the hole (7) below the diaphragm (4), which is pressed by the adjuster spring (2) and the piston (3) into its seat . When excess pressure is reached, the force of the adjuster spring (2) is overcome, so that the diaphragm (4) is raised from its seat and the hole (5) released. The compressed air passes directly and after opening of the check valve (6) to the downstream devices positioned in the direction of the arrow.
W14.40-1084-03