805561T 1 Mercruiser OIL COOLER

1. Remove bolts (1) and swing door assemblies (2) open. Secure the doors. 2. Fasten straps and a hoist to the fan blades as shown. Remove eight bolts from the rear of the fan. Remove fan (3) and fan motor adapter. Let the fan rest against the radiator. Weight of fan and fan adapter is 57 Kg (126 lb.). 3. Disconnect tube (4) from top of motor. Disconnect hydraulic hoses (5). Put plugs in the hoses. 4. Back off the retaining nut that holds the fan adapter to the fan motor approximately 3.175 mm (1/8 in.).5. Install four 3/8 - 16 NC forcing screws (6), equally spaced, in the fan adapter and force adapter loose from the motor shaft.6. Remove the adapter retaining nut. Leave the adapter loose on the shaft until the motor is removed. 7. Remove nuts (8). Remove fan drive motor (7). Weight is 32 Kg (70 lb.). For installation of the fan drive motor, reverse the procedures of Steps 1 through 7. In Step 6, tighten the adapter retaining nut to a torque of 410 40 N m (300 30 lb.ft.).Disassemble Fan Drive Motor
Start By: a. remove fan drive motor Make sure the outside of the fan drive motor is clean. 1. Remove seal plate (1) from the flange. 2. Remove seal (2) from seal plate (1). 3. Remove bolts (4). Remove flange (3) from the body. Pressure plate (6) has notches on the ends. Make a note of the shape of pressure plate (6) for correct installation.4. Remove pressure plate (6).5. Remove seals (5) and (7) from the pressure plate. 6. Remove drive gear (8) and idler gear (9) from the body. Pressure plate (10) has notches only on the sides. Make a note of the shape of pressure plate (10) for correct installation.7. Remove pressure plate (10) from the body. Remove the seals from the pressure plate.
There is spring pressure behind plug (11).
8. Slowly and carefully remove plug (11). Remove the spring and the piston.Assemble Fan Drive Motor
1. Clean and inspect all parts. Make a replacement of the parts that are worn or damaged. Put clean oil on the parts of the fan drive motor.2. Install the O-ring seal on plug (3).3. Install piston (1), spring (2) and plug (3) in the body. 4. Put seals (5) and (6) in position in pressure plate (4).5. Put the pressure plate in position in the body. 6. Put drive gear (7) and idler gear (8) in position in the body. 7. Put seals (9) and (11) in position in pressure plate (10).8. Put the pressure plate in position on the gears. 9. Put O-ring seal (13) in position in flange (12).10. Install the flange on the body. 11. Use tooling (A) to install seal (14) in seal plate (16). The lip of the seal must be toward the inside of the fan drive motor.12. Put O-ring seal (15) in position in seal plate (16). 13. Install seal plate (16) on flange (12).End By: a. install fan drive motor