GOV & FUEL INJ PUMP GP 4W4938 - Caterpillar

4. Loosen clamps (3) and remove elbow (1) from the radiator.5. Remove one half of fan guard (2) from the right side of the machine.
TYPICAL EXAMPLE6. Remove hose (5) and elbow (4) from the water pump and radiator. 7. Loosen the clamps that hold hose (7) in position and pull it from elbow (6).
RADIATOR REMOVED FOR PHOTO ILLUSTRATION8. Remove bolts (8), (10) and (11) that hold water pump (9) to the timing gear housing and remove water pump (9).Install Water Pump
1. Inspect the O-ring seal for the water pump. Install a new seal if needed. 2. Put water pump (2) and elbow (1) in position as a unit. Make sure the gasket for elbow (1) is in position and install the bolts to hold the elbow and water pump.3. Connect elbow (1) and the pipe together with the short hose and tighten the hose clamps. 4. Install elbow (3) and the gasket to the lower radiator tank. Connect elbow (3) to the water pump with hose (4) and tighten the clamps. 5. Install fan guard (5) on the radiator.6. Install the elbow and gasket to the top tank of the radiator. Connect hose (6) to the elbow and tighten the clamps.7. Install the side panel and hood on the machine.8. Fill the cooling system with coolant to the correct level.Disassemble Water Pump
start by:a) remove water pump 1. Remove cover (3) and gasket from water pump (1).2. Remove elbow (2) and gasket from water pump (1). 3. Loosen bolt (5) .25 in. (6.35 mm). Hit (tap) the bolt with a soft hammer to remove impeller (4) from the shaft. 4. Remove spring and seal assembly (7) from shaft (6). 5. Turn the water pump over and remove bolt (8) and lockwasher.6. Remove O-ring seal (9) from the housing. 7. Use tooling (A) to remove gear (11) and bearing (10) from the water pump.8. Remove bearing (10) from gear (11). 9. Remove snap ring (12) with tool (B). 10. Remove bearing (14) and shaft (13) as a unit. 11. Use tool (C) and a press to remove bearing (14) from the shaft. 12. Remove the ceramic ring and seal (15) from the housing. 13. Remove the lip type seal (16) from the housing with tooling (D).WATER PUMP Assemble Water Pump
The seal must be installed with the lip toward the bearings. 1. Install the lip type seal in housing (1) with tooling (A) to the bottom of the seal counterbore. Put a thin layer of engine oil on the lip of the seal. 2. Use a press to install shaft (2) in bearing (3). 3. Install the shaft and bearing (3) in housing (1). 4. Install snap ring (4) in the housing with tool (B). 5. Install bearing (5) on gear (6).
When gear (6) is installed, make sure the pins on the gear engage the holes in the shaft.
6. Put gear (6) and bearing in position on the shaft and install washer and bolt. 7. Install O-ring seal (7) on the