VDL Futura FHD2 E6, Руководство по ремонту

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Futura FHD2/FMD2 E6
DIAGNOSIS
Systems
2 - 8
2
DD1020_01
2.3.4 THE PEDAL FORCE IS TOO GREAT
2.3.5 RESIDUAL PRESSURE IN THE CLUTCH SYSTEM
2.3.6 FLUID LEAKS VIA THE VENTILATION OPENING
Possible cause Remedy
There is no pressure in circuit 4 of the brake system or
the pressure is too low. Check circuit 4 of the brake system.
The air line is pinched closed. Check the line and, if necessary, replace it.
The hydraulic line is pinched closed. Check the line and, if necessary, replace it.
The clutch pedal bearing ring is worn. Check the bearing and, if necessary, replace it.
Faulty clutch booster and/or main cylinder. Repair or replace the clutch booster/main cylinder.
Comment:
If the seal has expanded, clean the system and fill with
new fluid.
Possible cause Remedy
The bleed opening in the reservoir’s cap is closed. Check whether the bleed opening in the cap is open.
The compensation bore in the main cylinder is closed
due to an expanded seal or the thrust pin having an
insufficient free stroke. Check the thrust pin’s free stroke or repair/replace the
main cylinder.
Comment:
If the seal has expanded, clean the system and fill with
new fluid.
Possible cause Remedy
Leak via the piston seal in the clutch booster. Repair or replace the clutch booster.
Comment:
The presence of a drop of oil in the ventilation opening is
normal and is not a reason to repair/replace the clutch
booster.