DAF XF95, Руководство по обслуживанию

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©
200423 3-25
Inspection and adjustment
EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES
ΞΦ95
series
5
Checking and adjusting load-sensing air-
suspension control valve
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

on
the load-dependent control valve (input
pressure).
3. Connect a 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 8.5 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 pressure
gauge (4) indicates a pressure of 8 bar.
8. Read the brake pressure of the rear axle on
pressure gauge (2) and check that this brake
pressure matches the one listed on the
instruction plate in the table under "delivery
pressure p2" to the rear axle.
9. If the measured value is not correct,
depressurise connection (43) and, using a
special tool (DAF no. 1329464), turn the
adjusting nut (s):
- braking pressure too high: unscrew the
adjusting nut
- braking pressure too low: screw in the
adjusting nut.
Note:
When depressurising the simulation
connection (pressure gauge 43), the air hose
must remain connected to prevent the
(actual) bellows pressure from accidentally
activating the valve.
The small socket head screw in the centre of
the valve must not be adjusted.
10. Repeat the procedure described in point 6
until the measured braking pressure value is
within the tolerance limits.
43
1/4
4
2
2
R600473
1
41 42
r
s
R600478