818470 Mercruiser BEARING UNIT (.001 U.S.)(REFS. 11 AND 12)

1. Install tooling (A) under the cylinder block as shown. 2. Remove bolts (1) and pipe assembly (2) from the timing gear. 3. Remove bolts (3) and (4). Remove front support (5).
Use care when the trunnion is removed and installed to prevent damage to the crankshaft front seal.
4. Remove bolts (6) and trunnion (7) from the timing gear cover. 5. Remove bolts (8) and timing gear cover (9).6. Remove the old gasket from the contact surfaces of the timing gear cover and plate.Install Timing Gear Cover
1. Install a new gasket on the timing gear plate. Cut the gasket even with the bottom face of the cylinder block. Put 5H2471 Gasket Cement on the bottom of the gasket where the gasket makes contact with the gasket for the oil pan plate. 2. Put timing gear cover (1) in position on the timing gear plate and install the bolts that hold it in place.3. Put clean engine oil on the outside diameter of the crankshaft, the lip of the crankshaft seal and the O-ring seal for the trunnion.
Be extra careful when the trunnion is installed to prevent damage to the crankshaft front seal.
4. Put trunnion (2) and the O-ring seal in position on the timing gear cover and install the bolts that hold it. 5. Put front support (3) in position and install the bolts that hold it to the frame and trunnion.6. Remove tooling (A) from under the cylinder block. 7. Install the O-ring seal on the pipe assembly. Put pipe assembly (4) in position on the timing gear plate. end by:a) install oil pan plateb) install air conditioning compressorc) install water pumpd) install air compressore) install alternatorf) install fan driveg) install vibration damper and pulleyRemove Timing Gears And Plate
start by:a) remove timing gear cover1. Put the engine in correct timing. See REMOVE FUEL INJECTION PUMP HOUSING AND GOVERNOR for this procedure. 2. Remove bolt (1) and the washer that holds gear (2) in place.3. Install tooling (C) and bolt (1) to hold the sleeve on the end of the fuel injection pump camshaft.4. Install tooling (A) on gear (2) and tighten the center bolt of tooling (A) until the gear is loosened.5. Remove tooling (A), bolt (1), tooling (C) and the gear. 6. Remove bolts (4), plate (3) and idler gear (5). 7. Inspect the bearing in idler gear (5) for wear or damage. If a replacement of the bearing is needed, use tool group (B) and a press to remove it from the gear as shown. 8. Remove bolts (6) and camshaft gear (7) from the camshaft.9. Remove the three nuts on the back side of the plate that hold the fuel pump to the plate. 10. Bend locks (9) away from the bolts.11. Remove the bolts, locks (9) and plate (8) from the cylinder block.12. Remove the old gasket material from the cylinder block and plate (8).Install Timing Gears And Plate
1. Make sure O-ring seal (1) is in place on the fuel pump housing.2. Clean the old gasket from the contact surfaces of the timing gear plate and cylinder block. Install a new gasket on the cylinder block. Cut the gasket even with the bottom face of the cylinder block. Put 5H2471 Gasket Cement on the bottom of the gasket where the gasket makes contact with the gasket for the oil pan. 3. Put timing gear plate (2) in position on the cylinder block. Install the three nuts that hold the fuel pump on to the back side of the plate. Install the locks and six bolts that hold the plate in place. 4. Install camshaft gear (3) with the "C" mark on the camshaft gear in alignment with the "C" mark on the crankshaft gear. Install the washers and bolts that hold the gear in place. 5. Install the bearing in idler gear (4) with tool group (A) and a press. The end of the bearing must be 1.52 mm (.060 in. below the face of the gear hub. 6. Put idler gear (4) in position. Install the plate and bolts. 7. Put fuel injection pump drive gear (5) in position on the fuel injection pump.8. Install the bolt and the washer as shown to hold the timing gear to the camshaft. Install the washer with the larger outside diameter toward the bolt head. Tighten the bolt finger tight only.
TYPICAL EXAMPLE9. Install tooling (B) in the holes of the fuel injection pump drive gear as shown. Put a torque of approximately 68 N m (50 lb.ft. on the pump drive gear in a clockwise direction (as seen from the front of the engine). With the clockwise torque on the pump drive use tooling (C) to tighten the bolt to a torque of 270 25 N m (199 18 lb.ft.).10. For correct timing of the fuel injection pump and engine, see INSTALL FUEL INJECTION PUMP HOUSING AND GOVERNOR. end by:a) install timing gear cover