You will need
- - set carob and spanner wrenches;
- - ruler and Vernier caliper
To do a full clutch adjustment adjust the amount of secondary waste from the master drive to provide the proper clearance between the working surfaces of the clutch. Also adjust the gap between the end of the valve body cover and its adjusting nut and the adjustment of the clutch pedal.
Adjust the amount of the waste medium master disk, after dismantling of manhole covers to the clutch and flywheel housing. To do this, engage the clutch and set the gear lever in neutral gear position. Then start to rotate the engine flywheel, at the same time vvorachivaya until it stops in the middle drive plate, four adjusting screws, turning them in advance of the locknut.
Then, continuing to rotate the flywheel, loosen the adjustment screws one turn and tighten the lock nuts. When tightening jam nuts holding tool adjusting screw to avoid axial play and do not apply significant force to the lock nut.
Measure the clearance between the end face of the rear valve body cover and adjusting nut. It needs to be 3.3 to 3.7 mm. Control the size of the gap after each to-2. To adjust it, loosen the lock nut the adjusting nut, set the desired size of the gap and tighten the locknut, trying not to disturb the exposed gap.
To check pedal free play clutch take a ruler, pull the air from the pneumatic system and measure the amount of pedal travel before the appearance of typical efforts. The measured value should be equal 34-43 mm. Control free play whenever-1. Prior to inspection make sure the gap between the end face of the rear valve cover and adjusting nut (item 4) is correct.
To adjust the free pedal travel, disconnect duplici lever pedal linkage from the fork of the valve stem and the plug stem of the clutch slave cylinder. The cylinder piston move to its lowest position, the lower end of duplicera arm slide back until it stops. Make sure the plug hole of the cylinder rod and the hole of the lever is not aligned by about 50%. If the holes are rejected at a much greater or a much smaller quantity, bring the misalignment by rotating the cylinder rod to the desired size.
Then connect duplici arm with all the disconnected elements and the distance between the holes of the forks adjust the rotation of the forks themselves. If the friction linings of clutch disks are worn, to change the distance between the forks of the stem would be impossible. In this case, duplici remove the lever from the shaft the release fork and move it 1 spline counter-clockwise. After that re-adjust the free travel of the clutch pedal.
Advice 2 : How to bleed the clutch at MAZ
There are times when the clutch is not fully due to trapped in the hydraulic hose of the air. The test shows a normal pedal free play. To remove trapped air from a hydraulic drive of the required pumping the clutch.
Before pumping the clutch fill fluid supply tank of the hydraulic drive to a normal level, i.e. to the level of 1-1,5 cm from the top edge. Release valve air cylinder clean from dirt and dust. With its head remove the protective cap and put on her rubber hose from kit to the MAZ.
Lower the free end of the wearing of hose in the fluid for a hydraulic drive, which pre-pour in a litre capacity to the middle. Then press the clutch pedal 3-4 times with an interval of 1-2 seconds between presses. When you first press the pedal while holding the recessed pedal, loosen the bleeder valve on ½ or ¾ turn. Upon further pressing the pressure generated in the hose will expel the liquid from the system together with the contained air in the jar with brake fluid through a hose. As soon as air bubbles cease to come out, stop the procedure.
During pumping follow the liquid level in the supply tank and add it if necessary. The fluid level should not decrease by more than 2/3 from the norm. Measure the volume of liquid displaced by a single pressing on the clutch pedal, which should be 7-8 CC After bleeding, fill the fluid to the correct level (1-1. 5 cm from the top edge) and tighten the bleeder valve up to the stop with the recessed clutch. Remove the hose from the head and screw on the protective cap.
At the end of pumping, measure the maximum stroke of pneumatic-hydraulic amplifier, which must be at least 18 mm. Maximum SAG hight of the stem while pressing the clutch pedal should be no more than 1.5 times that of the initial state. Make sure that the tip of the wear sensor of brake linings does not protrude from the housing of the pneumatic cylinder of the amplifier. If necessary drown it in a protective case to touch.
The brake fluid used in the clutch, poisonous! Therefore, observe safety precautions when you work with it, and after pumping, wash your hands with soap and water.
Released from the system liquid can be reused after thorough settling and filtration.