818552 Mercruiser DRIVESHAFT (Front)

Start By:a. open engine enclosure or remove hood1. Move the disconnect switch to the OFF position.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Identify all hydraulic lines as they are removed for reinstallation purposes. Cap and plug all lines and fittings to prevent any contaminants from entering the system.2. Release the pressure in the hydraulic system by slowly loosening the fill cap located on the top of the hydraulic oil tank.3. Drain the hydraulic oil from the hydraulic oil tank. The capacity of the hydraulic oil tank is 80 liters (21.1 U. S. gallons). Refer to the Operation and Maintenance Manual, Form No. KEBU7506, for the correct procedure. Steps 4 through 11 are for machines equipped with a hood.4. Remove four bolts and battery cover (1) from the left side of the machine. 5. Attach Tool (A) to left side panel. Remove four bolts (3) and remove left side panel (4). The weight of the left side panel is 29 kg (64 lb). Note: During installation, shim the left side panel to 5 mm (0.197 inch). 6. Remove six bolts (5) and grill (6) from the machine. 10. Remove two bolts (8) from support assembly (7). 11. Attach a lifting strap to left support (9). Remove three bolts (10) and remove the left support from the machine. The weight of the left support is 25 kg (55 lb). 12. Disconnect three hose assemblies (11) from fan motor (12). Cap and plug immediately. Remove the bolt that fastens clamp (14) to guard (13). 13. Remove the two bolts and brace (15) from between the hydraulic oil tank and the radiator. Remove one bolt from the bottom of brace (16) and remove the brace.14. Remove four bolts (17). Remove the three bolts that fasten guard (13) to the left side of shroud (19). Remove shroud (19) from left side of the radiator.15. Remove four bolts (18), and remove fan motor (12) and guard (13). 16. Remove four bolts (21), and remove fan (20) from fan motor (7).17. Remove two bolts (22), and remove fan motor (12) from guard (13). For installation of the fan motor, reverse the removal steps. After the fan motor has been installed, fill hydraulic oil system with hydraulic oil to the correct level. Refer to the Operation & Maintenance Manual, Form No. KEBU7506, for the correct procedures.End By:a. close engine enclosure or install hoodDisassemble & Assemble Fan Motor
Start By:a. remove fan motor 1. Remove nut (2), and remove adapter (1) and the woodruff key. 2. Remove four bolts (3), and remove end cover (4) from the housing. 3. Remove relief valve (5) and check valve (6) from end cover (4). 4. Remove O-ring seals (7) and back-up ring (8) from relief valve (5). Check the O-ring seals and back-up ring for wear or damage, and replace if necessary. 5. Remove O-ring seals (9) and back-up ring (10) from check valve (6). Check the O-ring seals and back-up ring for wear or damage, and replace if necessary. 6. Remove housing (110 and thrust plate (12) from the shaft cover. 7. Remove seal (13) from thrust plate (12). Check the seal for wear or damage, and replace if necessary. 8. If necessary, remove four dowel pins (14) from housing (11).9. Remove two seals (15) from housing (11). Check the seals for wear or damage, and replace if necessary. 10. Remove drive gear (16), idler gear (18) and thrust plate (19) from shaft cover (17).11. Remove the seal from thrust plate (19). Check the seal for wear or damage, and replace if necessary. 12. Remove retaining ring (20) and lip-type seal (21) from shaft cover (17). Check the lip-type seal for wear or damage, and replace if necessary. For assembly of the fan motor, reverse the disassembly steps.End By:a. install fan motor