67C3K11 3-141234567893. Check the oil for metal and discoloration,and its viscosity. Check the internal partsof the lower case if necessary.4. Insert a gear oil tube or gear oil pumpinto the drain hole and slowly fill withgear oil until oil flows out of the checkhole and no air bubbles are visible.5. Install new gaskets and the gear oilcheck screw 2, quickly install the gearoil drain screw 1, and then tighten themto the specified torque.Checking the lower unit for airleakage1. Remove the gear oil check screw 1, andthen install the special service tool.2. Apply the specified pressure and checkthat the pressure is maintained in thelower unit for at least 10 seconds.CAUTION:Do not overpressurize the lower unit, oth-erwise the oil seals can be damaged.NOTE:Cover the check hole with a rag when remov-ing the special service tool from the lowerunit.3. If the specified pressure cannot be main-tained, check the propeller shaft, driveshaft, shift rod, O-rings, and oil seals fordamage. If necessary, check each shaftfor bends.Recommended gear oil:Hypoid gear oilAPI: GL-4SAE: 90Gear oil quantity:430 cm3(14.54 US oz, 15.17 Imp oz)S67C304421S67C3045T R..Gear oil check screw 2 and drainscrew 1: 9 N·m (0.9 kgf·m, 6.6 ft·lb)Leakage tester: 90890-06840Lower unit holding pressure:100 kPa (1.0 kgf/cm2 , 14.5 psi)S67C30471Bracket unit / Lower unit
