16253 Mercury FLOAT

2. Remove two bolts (2), elbow (1), tube (3). Remove the O-ring seals at each end of tube (3). 3. Remove two bolts (4), flange (6), the seal and the gasket.4. Remove two bolts (7), elbow (5) and the gasket. 5. Remove four bolts (10)6. Remove four nuts (8) and one bolt (9). Remove water pump (11), the seal and the gasket. The following steps are for the installation of the water pump. Check all seals and gaskets for wear or damage and replace with new parts if necessary. 7. Put the seal and water pump (11) in position and install four nuts (8) and one bolt (9).8. Install the gasket and four bolts (10). 9. Put elbow (5) in position with the gasket, the seal, flange (6) and install bolts (4). Lubricate the bore and seal lightly with glycerin or approved equivalent.10. Install two bolts (7) and the gasket. 11. Put the O-ring seals and tube (3) in position. Lubricate the bore and seals lightly with glycerin or approved equivalent.12. Put the gasket and elbow (1) in position and install two bolts (2). For more detailed information regarding the water pump, see the topic "Water Pump" in the Specifications Module.Disassemble Water Pump
Start By:a. remove water pumpFluid Spillage Containment
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "Tools And Shop Products Guide", NENG2500 for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of fluids according to local regulations and mandates. 1. Remove O-ring seal (1) from adapter (2).2. Remove adapter (2) with a screwdriver. Remove the seal from the edge of adapter (2).3. Remove bolt (3) and washer. 4. Remove impeller (4) from the water pump housing with Tooling (A). 5. Remove seal assembly (5). Remove ring and seal (6). 6. Remove bolt (7) that holds gear (8). Remove gear (8).7. Remove bolts and retainer (9). 8. Remove shaft (10) and bearings as a unit.9. Remove bearing (11), spacer (12) and bearing (13) from shaft (10).10. Remove lip-type seal from the gear side of the water pump. Remove ring and seal from the impeller side of the water pump.Assemble Water Pump
1. Put clean engine oil or glycerin on the lip of seal (1). Install seal (1) as shown with Tooling (A). 2. Install bearing (4), spacer (3) and bearing (5) on shaft (2). Install shaft (2) in the pump housing. 3. Install retainer (8) and the bolts that hold it.4. Install gear (7) with bolt (6).
Clean water only is permitted for use as a lubricant for assistance at installation. Do not damage or put hands on the wear surface of the carbon ring or the ceramic ring. Install the ceramic ring with the smoothest face of the ring toward the carbon seal assembly.
5. Put ceramic ring (10) in position in the rubber seal (9). Use hand pressure and the tool (which is with the replacement ring) to install the ceramic ring in the housing. 6. Remove the spring from seal assembly (11). Use the tool that is with the replacement ring to install seal assembly (11). Push the seal assembly on the shaft until the carbon ring (on the seal assembly) makes light contact with the ceramic ring. 7. Install spring (12) on the seal assembly and impeller (13) on the shaft. Install the bolt and washer on the shaft. Tighten the bolt to a torque of 39 3 N m (29 2 lb ft). 8. Install O-ring seals (14) on adapter (15). Put clean engine oil on O-ring seals.9. Install adapter (15) in the pump housing. Make sure the notch in the adapter is in alignment with dowel (16).End By:a. install water pump