gf5590w1008a

MG pressure sensor (HAD), component description

Type gf · topic 55.90 · version 0100 · 2016-01-08

Applies to: Model 963, 964 with code A1H (Hydraulic Auxiliary Drive (HAD))

Where it sits

Function group 2 Chassis › 55 Auxiliary drive systems, hydraulic and linkage systems › 55.90 Hydrostatic traversing gear — Series 963 · Series 964

GF55.90-W-1008A

MG pressure sensor (HAD), component description

2.12.15

Model

963, 964

with code A1H (Hydraulic Auxiliary Drive (HAD))

Location

MG pressure sensor (HAD), component description

W55.90-1141-08

2

Valve block

B111

MG pressure sensor (HAD)

The manual transmission pressure sensor (HAD) (B111) is installed in the valve block (2) on the right side of the vehicle on the vehicle frame.

Task

The manual transmission (HAD) pressure sensor (B111) measures the control pressure in the valve block (2) supplied by the fixed displacement pump.

Function

In the manual transmission pressure sensor (HAD) (B111), the diaphragm with strain gauges is deformed, to match the applied hydraulic fluid pressure. This changes the electrical resistance of the strain gauges. The higher the pressure, the greater the deformation of the diaphragm and the higher the electrical resistance. This change in resistance is measured by an integrated electronics system and then converted into a voltage signal. The Hydraulic Auxiliary Drive (HAD) control unit (A83) reads in this voltage signal directly. The voltage signal is only generated once the control pressure solenoid valve (HAD) (Y69) is switched.

The electronics in the manual transmission pressure sensor (HAD) (B111) require a power supply of 5 V and they supply an output voltage of 0.5 to 4.5 V. The measuring range is 0 to 80 bar.