METHOD F AND DEVICE FOR BLEEDING AIR FROM CLUTCH AND BRAKE HYDRAULIC DRIVES Russian patent published in 2000 - IPC

FIELD: transport engineering. SUBSTANCE: method comes to alternate connection of device hose to bleeder valve of clutch or brake system and turning valve through 1/2-3/4 of turn and forcing out brake fluid by sharply pressing on clutch or brake pedal 3 - 5 times with 2 - 3 s intervals between pressings until air bubbles cease to come out of brake or clutch system. Device is preliminarily filled with brake fluid to definite level and is installed at height of 0.8 - 1/0 m and then is connected with brake system or with clutch system to create static pressure of fluid equal to 800 - 1000 Pa. Then bleeder valve of clutch or brake system is backed off through 1/2 - 3/4 of turn and is kept so during entire period of bleeding which is done starting from circuit farthest from master cylinder. Brake fluid is cleaned by filter, mesh size 0.8 - 1.0 mm. Device has vessel partially filled with brake fluid and hose. Vessel made in form of cylinder is essentially a cup manufactured of transparent material, and provided with equalizing tube with fastening thread in lower part and with longitudinal hole in central side part for draining cleaned fluid. Two unions with welded-to nuts and provided with thread at one side are secured in bottom of cup to deliver fluid into cup. Drain union with welded-to nut is provided with thread at one side for fastening union in cup bottom and for turning on equalizing tube. Cross slots in upper part of union are used for complete overflow of fluid. EFFECT: enhanced reliability and improved bleeding of hydraulic drives. 4 cl, 1 dwg, 2 ex