DS 19 OPERATION No. DS 334-1 Work on the gear control. Op. DS 334-1 233
TOOLS
34 Start the engine, let it idle for a few minutes. Tighten the bleed screw in order to put the systems under pressure.
Check the joints for leakage. Change into each gear in succession in order to check the sealing of the flanges . . 8 mm spanner
35 Bleed the hydraulic gear selector (see Op. DS 334-0).
36 Adjust the slow running (see Op. DS 142-0).
Adjust the clutch clearance (see Op. DS 314-0, paragraphs 20 to 23).
Adjust the clutch drag (see Op. DS 314-0, paragraphs 18 and 19).
Adjust the clutch engagement control (see Op. DS 314-0, paragraphs 24 to 26).
REPLACEMENT OF A GEAR CHANGE SPEED CONTROL (Adjustment of Pressure)
Removal.
37 Release the pressure in the system. Put the auxiliary clutch control lever in the “declutched” position.
Remove the nuts fixing the flange of the feed pipe assembly from the gear change speed control.
Remove the screw fixing the gear change speed control on its bracket and remove the control. Remove the
seal plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 or 10 mm ring spanner
Refitting.
38 Put the gear change speed control in position, insert the seal plate. Offer up the nuts fixing the feed pipe assembly
flange to the gear change speed control without tightening (spring washers). Tighten the screws fixing the gear
change speed control on its bracket (plain and spring washers under the heads) and tighten the nuts fixing the
feed pipe assembly flange to the gear change speed control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 or 10 mm ring spanner
39 Bleed the system controlling the gearbox (see Op. DS 334-0).
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