Usage:
Fluid 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 the 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.
NOTE: Intermittent leakage of a small amount of coolant from the weephole is not an indication of water pump seal failure. Weepage is normal to ensure proper lubrication of the coolant seal faces. Replace or repair the water pump only if a large amount of oil or coolant leakage or a constant flow of coolant is observed draining from the weephole in the water pump housing.
1. Drain the coolant from the engine into a suitable container for storage or disposal.
2. Remove the alternator and alternator mounting group from the engine.
3. Remove engine oil cooler (1) from the engine. Refer to the Disassembly and Assembly, "Remove and Install Engine Oil Cooler" for additional information.
4. Loosen hose clamp (2).
5. Remove bolts (4) and water pump elbow (3) from water pump (5).
6. Check the condition of the O-ring seal used between elbow (3) and water pump (5). If the part is worn or damaged, replace the part.
7. Remove the bolts from the timing gear cover and water pump (5). Remove water pump (5).
Typical Example
8. Check the condition of O-ring seal (6) on water pump (5). If the part is worn or damaged, replace the part.
9. Install the water pump in the reverse order of removal.
10. Fill the engine with coolant to the correct level. Refer to the Operation and Maintenance Manual, "Refill Capacities" in the Maintenance Section.
Disassemble and Assemble Water Pump
Start By:
a. remove water pump
NOTE: Intermittent leakage of a small amount of coolant from the weephole is not an indication of water pump seal failure. Weepage is normal to ensure proper lubrication of the coolant seal faces. Replace or repair the water pump only if a large amount of oil or coolant leakage or a constant flow of coolant is observed draining from the weephole in the water pump housing.
1. Remove O-ring seal (3) from adapter (4). Remove adapter (4) from housing (7). Remove the O-ring seal from the outside of the adapter.
2. Remove bolt (1) and washer (2). Use Tooling (A) to remove impeller (6) from shaft (12).
3. Remove bolt (14) and retainer (13) from shaft (12). Remove gear (16) from shaft (12).
4. Remove four bolts (15) from bearing retainer (11). Remove bearing retainer (11). Remove bearing race (9) and bearing rollers (10) by inverting the pump assembly. Bearings will slide out of the housing and oil of the shaft.
5. Use a press to press shaft (12) through coolant seal (5) and out of the pump in direction of the gear.
6. Invert the pump and drive or press coolant seal (5) out of housing (7).
7. Invert the pump and drive oil lip seal (8) out of housing (7).
NOTE: The following steps are for the assembly of the water pump.
8. Use 4C-9500 Quick Cure Primer to clean shaft (12) and the counter bore in the pump housing.
9. Use Tooling (B) to install new oil lip seal (8) in housing (7). Install seal with part number side facing the housing. Ensure the seal is flush with the leading edge of the housing counter bore. DO NOT LUBRICATE THE LIPS OF THE OIL LIP SEAL.
10. Install bearing race (9) and bearing rollers (10) on shaft (12).
11. Place bearing retainer (11) with "this side up" markings facing the gear end of the shaft. Install gear (16). Install retainer (13) and bolt (14) on shaft (12). Tighten bolt (14) to a torque of 215 ± 40 N·m (160 ± 30 lb ft).
12. Slide Tooling (C) over shaft (12) with tapered edge facing outward.
13. Install the gear and shaft assembly into housing (7), using care not to damage oil seal lips. Install 4 bolts (15) that hold bearing retainer (11) to the housing.
14. Remove Tooling (C) from shaft (12).
15. Install a new O-ring seal (17) in the housing.
16. Using a suitable press and Tooling (D), press new coolant seal (5) over shaft (12) and into housing (7). Ensure that outer shell of seal is fully seated in housing.
17. Put impeller (6) in position on shaft (12). Install washer (2) and bolt (1) that hold the impeller. Tighten the bolt to a torque of 39 ± 3 N·m (28 ± 2 lb ft).
18. Install a new O-ring seal on the outside of the adapter (4). Lightly lubricate the seal with clean SAE 10W30 Oil.
19. Install a new O-ring seal (3) on the adapter (4).
20. Put adapter (4) into position on housing (7).
End By:
a. install water pump