2) 2) INTRODUCTION INTRODUCTION (1) (2) (3) (4) Most repairs require the removal of the control unit from the vehicle. Cleanliness is extremely important. Clean the port areas thoroughly before disconnecting the hydraulic lines. Plug the control unit ports and cover open hydraulic lines immediately after they have been disconnected. Drain the oil and clean the exterior of the control unit before making repairs. Wash all metal parts in clean solvent. Use filtered, moisture-free compressed air to dry the parts. Do not wipe them dry with paper towels or cloth - lint in a hydraulic system will cause damage. Always use new seals when reassembling hydraulic control units.
Lubricate new rubber seals with a petroleum jelly before installation. Torque all bolts over gasketed joints, then repeat the torquing sequence to make up for gasket compression. (5) (6) (7) (8) (9) (10) After all repairs are complete it is essential to verify the accuracy of control unit repairs on an authorized test stand. 3) 3) TOOLS TOOLS Screwdriver (102~152 mm [4~ 6"] long, Ч 3 mm [118"] wide flat blade) 1/2 inch socket for current hex head cap screws. Breaker bar wrench. Torque wrench (30 Nm [300 lb-in] capacity). (1) (2) (3) (4) 5-21