DS 19 OPERATION No. DS 00 : Work on the hydraulic system. Op. DS 00 27
TOOLS
IMPORTANT REMARK
If any irregularity of working occurs make certain that the hydraulic system is under pressure before doing
anything else. To do this :-
With the engine idling :-
- Unscrew the pressure regulator bleed screw about one to one and a half turns (one should be able to
hear the release of pressure in the control valve) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm spanner
- Screw up the bleed screw and the valve should cut-out in less than 20 seconds (the point of cut-out is
indicated by a reduction in the noise of operation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm spanner
If the above is not the case, check in the order shown, the following points :
- That there is sufficient hydraulic fluid in the reservoir.
- That the filter in the reservoir is perfectly clean and in good condition.
- That the air is not being sucked in through the pump inlet pipe.
- That the belt of the high pressure pump is not slipping.
- That the bleed screw has been screwed up.
- Carry out the checking as indicated in Op. DS 391-0.
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