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Removal Drain the differential lubricant. See LUBRICATION . Disconnect the clutch pump check valve electrical connector. Remove the clutch pump check valve mounting bolts. See Fig. 1 . Remove the clutch pump check valve by carefully pulling straight out of the differential carrier. Remove the “O” ring seals from the valve. The “O” ring seals may be reused if not cut or damaged. If reinstalling original valve, inspect for damaged, loose, or missing pick up screen, damaged or missing “O” rings, damaged electrical connector, or oil passages restricted by dirt or debris. Installation NOTE: Inspect the clutch pump check valve “O” ring seals to ensure they are not cut or damaged. Replace cut or damaged “O” ring seals with NEW seals. 1. Lubricate the “O” ring seals with Synthetic Gear Oil (12378514 for United States or 88901045 for Canada) or equivalent. Install the “O” ring seals to the valve. Install the clutch pump check valve to the differential carrier by carefully pushing the valve straight in until fully seated. 2. Install the clutch pump check valve mounting bolts. See Fig. 1 . Tighten the bolts to specification. See TORQUE SPECIFICATIONS . Connect the clutch pump check valve electrical connector. Inspect differential fluid level. See LUBRICATION . Fill differential as necessary.