DAF LF45 Series, Maintenance Manual

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©
200515 3-21
Inspection and adjustment
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
ΛΦ45/55
series
5
3.26 INSPECTION AND ADJUSTMENT, LOAD SENSING VALVE, LEAF
SUSPENSION
Explanatory notes on instruction plate
The data relating to axle loads and output
pressures are listed on the instruction plate
following the sequence of the 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 "output pressure P2" of axle 1 will give
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. Measure the weight plus load of the rear
axle.
2. Check the attachment of the control lever
and its ease of operation.
3. Check that the right type of valve has been
fitted.
4. Check the length of the control lever
(see "L" on the instruction plate).
5. Connect a pressure gauge (4) to the test
connection near connection 1/4 on the load
sensing valve (input pressure).
6. Connect pressure gauge (2) to the test
connection on one of the brake cylinders
(service brake connection) of the rear axle.
7. Make sure that the reservoir pressure is
higher than 6.5 bar throughout the testing
process.
8. Depress the brake pedal until pressure
gauge (4) indicates a value of 6 bar.
9. Read the brake pressure of the rear axle
from pressure gauge 2 and check that this
value matches the one listed on the
instruction plate in the table under "output
pressure p2" to the rear axle.
R6 00 549
1/4
4
2
2
R600562
1
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