TM 5-3895-373-20REFERENCE INFORMATION HYDRAULIC CYLINDER CIRCUITSTESTPORT #5SCREED LIFT CYLINDERS - PRESSURE CHECK PROCEDURE1.With engine running at MAX speed, lift screed tofully-raised position. Place cribbing below bothends of main screed, leaving 1 to 1-1/2 in. airgap between screed plate and cribbing.2.Support screed in fully-raised position withhydraulic jacks at rear flanges of screed towarms.3.Turn paving machine off. Use hydraulic jacks toadjust screed height so that screed lift cylinderclevis pins turn freely in cylinder mountingknuckles.Make sure lift cylinders are not underload before removing hydraulic hosesfrom lift cylinder retract ports. Hydraulicoil under pressure can penetrate skin ordamage eyes.4.Make sure lift cylinders are not under extensionor compression load. Disconnect hoses frombottom (retract) port elbows of screed liftcylinders. Plug hose ends and cap off cylinderretract port elbows; use #6 JIC (9/6-18) highpressure caps.NOTEWhen hydraulic jack is lowered, screed is expected todrop slightly. This initial drop will make up for fluid lossthat occurred during removal of supply hoses fromcylinders.5.Release both hydraulic jacks at the same time.When screed is stable, use straightedge andpencil to mark vertical position of left and righttow arms.6.After 1/2 hour, mark settled position of screedtow arms. Measure distance between upper andlower pencil marks on left and right side ofscreed. Answer question in paragraph B5 offlowchart.7.Support screed in raised position with hydraulicjacks at rear flanges of screed tow arms. Adjustscreed height to remove load from screed liftcylinders.8.Remove plugs and caps and reconnect screedlift cylinder hoses.After completing diagnostic checks, close right, centertop left, and center top right access doors per TM 5-3895-373-10.2-275
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business