©
200515 3-19
Inspection and adjustment
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
ΛΦ45/55 series
5
3.25 INSPECTION AND ADJUSTMENT, LOAD SENSING VALVE, AIR
SUSPENSION
Explanatory notes on instruction plate
The information contained on the plate relates to
the axle loads, the output pressures and bellows
pressures, in accordance with the order of axles
beneath the vehicle.
"1" refers to the (first) front axle, "2" to the
following axle, etc.
In the entire column, a reading of 6 bar has been
filled in under "1".
If the vehicle is equipped with an empty/load
valve, a pressure ratio is entered in the box under
the valve illustration, e.g. "i = 1 : 1.5".
The "delivery pressure p2" of axle "1" then
indicates variable readings.
These values can be used to check the brake
pressure values of the front axle and to carry out
the inspection/adjustment below at the same
time. To do this, connect a pressure gauge to the
test connection of one of the front axle brake
cylinders.
Inspection/adjustment
1. Check that the correct valve has been fitted
(see instruction plate).
2. Connect pressure gauge (4) to the test
connection close to connecting point 1/4 on
the load sensing valve (input pressure).
3. Connect pressure gauge (2) to the test
connection on one of the brake cylinders
(service brake connection) of the rear axle.
4. Connect a pressure gauge (43) with a
pressure-reducing valve to the simulation
connection near connections 41 and 42 of
the load sensing valve (= simulated
adjustable bellows pressure).
5. Make sure that the reservoir pressure is
higher than 6.5 bar throughout the testing
process.
6. Set the simulated bellows pressure to its
second lowest value, as indicated on the
instruction plate.
7. Depress the brake pedal until the pressure
gauge (4) indicates a pressure of 6 bar.
R6 00 548
43
1/4
4
2
2
R600473
1
41
42
r
s
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