6.5.4. Check of tightness of the main cylinder

Fig. 6.15. Scheme of check of tightness of the main cylinder: 1 – the valve for pumping of the stand; 2 – manometer; 3 – the absorbing cylinder; 4 – tank of the main cylinder; 5 – index of shift of a pusher; 6 – flywheel; 7 – main cylinder

Install the main cylinder on the BS-137.000 stand and connect it to stand elements as it is specified fig. 6.15.
Fill a tank with brake fluid and, moving several times pistons of the main cylinder at the full length of their course, pump over system via valves 1.
Rotating a flywheel 6, slowly advance pistons of the main cylinder until pressure controlled by manometers 2 does not reach 12,5 MPas (125 kgfs/cm2). In this situation block a pusher of the main cylinder. The specified pressure has to remain constant not less than 5 pages.
In case of leak of liquid or change of pressure during 5 with replace sealing rings of pistons of the cylinder.