0350271 JOHNSON *SCREW

2. Remove radiator and fan guard (1). 3. Loosen the hose clamps and disconnect hoses (2), (3) and (5). Disconnect electrical sensor (4). 4. Remove four bolts and washers (7).5. Use two people to remove water pump (8), O-ring seal (9), and gasket (6) from the engine. The weight of the water pump is approximately 23 kg (51 lb). For installation of the water pump, reverse the removal steps.6. Fill the cooling system with coolant to the correct level. See the Operation & Maintenance Manual.Disassemble & Assemble Water Pump
The following tools are needed for disassembly Start By:a. remove water pump Fluid Spillage ContainmentCare 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 fluids according to local regulations and mandates. 1. Remove bolt (15) and the washer. Remove bearing (12) and gear (10) as a unit.2. Use Tooling (A), (C) and a press, and remove bearing (12) from gear (10).3. Remove snap ring (8) with Tool (B).4. Remove two bolts (1), the washers, cover (14) and gasket (2) from water pump housing (18).5. Loosen bolt (13) approximately 6.4 mm (.25 in). Hit the bolt with a soft hammer to loosen impeller (16) from shaft (9).6. Remove bolt (13), washer (11), impeller (16), spring (3) and seal assembly (4) from shaft (9).7. Remove bearing (7) and shaft (9) as a unit.8. Use Tooling (A), (C) and a press to remove bearing (7) from shaft (9).9. Remove ceramic seal (5) and seal (17) from water pump housing (18).10. Use Tool (C) to remove lip seal (6) from the water pump housing. The following steps are for assembly of the water pump. The following tools are needed for assembly.11. Install lip seal (6) in water pump housing (18) with Tool (C). The lip of the seal must be toward the bearings. Put clean engine oil on the lip of the seal.12. Install shaft (9) in bearing (7) with a press.13. Install shaft (9) and bearing (7) as a unit in water pump housing (18).14. Install snap ring (8) with Tool (B).
Clean water only is permitted for use as a lubricant for assembly. 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.
15. Put ceramic ring (5) in position in seal (17). Use hand pressure and Tool (D) to install the ceramic ring.16. Remove spring (3) from seal assembly (4). Use hand pressure and Tool (D) to install the seal assembly. Push seal assembly (4) on shaft (9) until it makes light contact with ceramic ring (5).17. Install spring (3) on seal assembly (4). Put impeller (16) in position on shaft (9), and install washer (11) and bolt (13) that hold it. Tighten bolt (13) to a torque of 38.0 1.5 N m (28 1 lb ft).18. Put gasket (2) and cover (14) in position on water pump housing (18), and install the two washers and bolts (1) that hold them.19. Install bearing (12) on gear (10) with a press.20. Position gear (10) and bearing (12) as a unit on shaft (9). Install the washer and bolt (15) that hold them together. Tighten bolt (15) to a torque of 97 7 N m (72 5 lb ft).End By:a. install water pump