821947 Mercruiser OIL SEAL

1. Remove two clamps (2) and top radiator hose (1) from the radiator and the fuel tank. 2. Loosen two bolts (6), one on top and one on the bottom, on the alternator bracket.3. Pivot the alternator toward the engine, and remove V-belts (3) from the alternator drive pulley.4. Fasten a hoist and nylon lifting strap to fan drive (4). Remove bolts (5) and washers from the mounting bracket. The weight of fan drive (4) is 23 Kg (50 lb).
Make sure that the fan spider assembly or the fan drive does not fall, this could cause damage to the radiator core.
The following steps are for the installation of the fan drive. Check the condition of the fan spider assembly for damage or broken fan blades. Check the condition of the hub area of the fan assembly. If the part is damaged, use a new part for replacement.5. Attach a nylon lifting sling and a hoist to fan drive (4). Position fan drive (4) to the mounting bracket. The weight of fan drive (4) is 23 Kg (50 lb).6. Install bolts (5) and washers to fan drive (4) to the mounting bracket.7. During the installation of the V-belts, check the condition of all the V-belts. If any of the V-belts are damaged, use new parts for replacement.8. Install V-belts (3) on the alternator drive pulley.9. Adjust the V-belt tension. Refer to the "Operation & Maintenance Manual" for the proper procedure of adjusting (new or used) V-belt tension.a. Tighten the V-belts until they deflect 12 mm (1.2 in) for new V-belts, or 16 mm (5/8 in) for old V-belts under the application of a 13 Kg (25 lb) force half way between the pulleys.b. A Borroughs Gauge No. BT-33-72-4-15 can also be used to make the V-belt adjustment. Make an adjustment to the V-belt farthest from the engine. The gauge reading for a new V-belt must be 120 5 and for a V-belt with a minimum of 30 minutes of operation time 90 10.10. Position top radiator hose (1) and tighten two clamps (2) and to the radiator and the fuel tank.End By:a. install fan spider assemblyb. install hoodDisassemble & Assemble Fan Drive
Start By:a. remove hoodb. remove fan spider assemblyc. remove fan drive 1. Remove three bolts (6) and washers. Access to bolts (6) can be made by rotating the fan pulley.2. Remove fan pulley assembly (2) from fan support (1).3. Remove two bolts (4) and thrust plate (5).4. Remove roller bearing assembly (8) and the bearing retainer from the fan pulley. Remove O-ring seal (7) from the bearing retainer. The following steps are for the assembly of the fan drive group.5. Be sure all parts of the fan drive group are thoroughly clean prior to assembly.6. Check the condition of O-ring seal (7) used in the bearing retainer. Also, check the condition of roller bearing assembly (8). If the components are damaged, use new parts for replacement.7. Install roller bearing assembly (8) in the bearing retainer. Be sure the lip-type seal in the roller bearing assembly is facing toward the bearing retainer.8. Install O-ring seal (7) in the bearing retainer. Put the bearing retainer and the roller bearing assembly, as a unit, in position on pulley (2). Be sure the inner race of the roller bearing assembly in seated against the shoulder on the pulley.9. Install thrust plate (5) and two bolts (4).10. Put pulley assembly (2) in position in fan support (1). Install three bolts (6) and washers that hold the unit together. Access to the mounting bolt holes can be made by rotating the fan pulley.11. Fill the bearing cavity in the fan drive with 30 g (1 oz) of 2S-3230 Bearing Lubricant.End By:a. install fan driveb. install fan spider assemblyc. install hood