105400-4621 ZEXEL 9 420 612 489 BOSCH GOVERNOR 9420612489 1054004621

Install Water Pump
1. Put the gasket and water pump (1) in position in the timing gear cover. 2. Install the pointer and bolts to hold the water pump.3. Put the vee belts in position on the engine.4. Use a belt tension gauge such as Borroughs Tool Company Part No. BT-33-72C or an equivalent and make an adjustment of the vee belts. Tighten new belts until the gauge indication is 120 5. Operate the engine at high idle for a minimum of 30 minutes after Step 5. Make another adjustment of the belt tension. The correct gauge indication for used belts is 90 10. Tighten the bolts that hold the alternator.5. Fill the cooling system with coolant to the correct level.Disassemble Water Pump
a) remove water pump1. Hold the pump shaft in a vise as shown and remove the bolt and pulley (1). 2. Use tooling (A) and a press to remove the shaft, seal and impeller from housing (2) as shown.
The press must have a guard. The guard has been removed for photo illustration.
3. Remove bearing (3) from housing (2). 4. Remove spacer (4) from housing (2). 5. Use tool (B) to remove ring (5) from housing (2). Remove bearing (6) from housing (2).6. Use a press and tool (C) to remove the shaft and seal assembly from impeller (7) as shown. 7. Install the seal assembly and shaft in housing (2) as shown. Use a press and tool (C) to remove the shaft from the seal assembly. Assemble Water Pump
1 Install bearing (1) in housing (3). Use tool (A) to install ring (2) that holds bearing (1) in position. 2 Install spacer (4) in housing (3). 3 Make sure the outside diameter of bearing (5) and the bore in housing (3) are clean and dry. Install bearing (5) in housing (3). Fill the chamber area between the housing and outside diameter of bearing (5) with 7M7456 Bearing Mount. Remove the excess bearing mount from the housing. 4. Turn the pump housing over and make sure that the bores in the bearings and spacer are in alignment. Install the shaft through the bearings from the impeller side of the housing. The shaft to bearing clearance can be 0.018 mm (.0007 in.) loose to 0.008 mm (.0003 in.) tight. If it is necessary to use a press to install the shaft, make sure the inner races of the bearings have support. 5. Install pulley (6) on the shaft and tighten the bolt to a torque of 75 7 N m (55 5 lb.ft.). 6. Put a new seal assembly (7) on the shaft as shown.7. Use tool (B) and a press to install the seal assembly in housing (3). Do not use a hammer to install the seal. 8. Put tool (D) between impeller (8) and the pump housing.9. Use a press and tool (C) to install impeller (8) on the shaft until tool (D) can just be moved between the housing and impeller. 10. If