Back flow
valves be read as "one contrivance trial valves," are used in many vehicle hydraulic applications. One bag check valves come in two predominant types--ball checks and flapper valves. Ball trial valves acquire a ball bearing inside that plugs the orifice and prevents fluid from going back over the valve. Hydraulic compel seats the ball and enhanced force isolated tightens the seal. Flapper type valves applicability a hinged movable flap that is pushed over the orifice when compel tries to back flow. Interpret on to memorize connect a back flow prevention valve.
Instructions
1. Recognize that test valves come in a diversification of sizes. In universal, they are used in the vehicle braking course to prevent brake fluid from returning to the reservoir when under strength. Either type check valves are used and installation is the equivalent for both types. Deposit a drip pan under tubing and evaluation valve to be changed.
2. Using contour wrench or channel wrench, turn the Trimmings counter Watch clever to loosen. Whether any impulse remains in the contour, concede it to be released while fittingd are loose. Lengthen turning the fittings counter-clockwise until they are completely disengaged.
3. Remove check valve from tubing and allow residual fluid to go in drip pan.
4.5. Place new check valve up to new fitting on one end. Use line wrench and turn clockwise until fitting is snug.
If fittings need replaced, now is the time to remove them by using the tubing cutter. After cutting the tubing below the fitting, remove old fitting and replace with a new ferrule and fitting. Use same procedure for the opposite fitting. Be sure the check valve is pointing in the right direction. The check valve will have an arrow embossed into the valve. Make sure arrow points in the direction of flow from the line. Use a line wrench and attach a second fitting to the opposite end of check valve. Use service manual procedures for removing air from the line and dispose of fluid in drip pan in an OSHA approved container.
