d. Repair. Replace the bearing if it is worn, corroded, scored, etched, or damaged. Inspect the mounting surfaces of
the pump body. Replace the pump if it is badly etched, corroded, or worn. Replace the impeller if corroded or if the fins
are broken or damaged. Replace all defective mounting screws.
(1) Use an arbor press and press the bearing (8) on the water pump shaft (9).
(2) Install the seal (7) and retainer (6) on the shaft (9) facing the bearing (8).
(3) Press the impeller (10) on the water pump shaft (9).
(4) Use an arbor press and press the shaft (9), bearing (8), seal (7), and retainer (6) assembly into the water
pump body (4).
(5) Install the pipe plug (5).
(6) Coat a new gasket (11) with fast-drying gasket sealer and install it on the water pump cover (12). Make
sure that the holes in the gasket and in the cover are properly alined.
(7) Install the cover (12) on the water pump body (4), making sure that the mounting holes in the body, gasket,
and cover are properly alined.
(8) Install and tighten the cover mounting screws (13).
(9) Press the water pump pulley (1) on the shaft (9). Check the water pump shaft for free rotation.
b. Top tank.
(2) Cleaning and inspection. Discard the top tank gasket (9) and wash the top tank (8) in cleaning solvent.
Clean all corners and recesses in the top tank with a stiff brush. Remove accumulated sludge, lime,
corrosion, and foreign matter from the top tank. Inspect the tank for etching, cracks, breaks, and leaks.
Inspect all mounting screws for corroded, damaged, or stripped threads. Check the mounting surface of the
top tank for breaks, cracks, and dents.
(3) Repair. Use soft-faced hammers to pound out all dents in the mounting surfaces and top tank body. Weld
or solder all cracks, breaks, and holes. Avoid excessive heat when welding or soldering, as it may warp or
distort the top tank body. Replace the top tank if it is badly etched, corroded, or cracked. Replace all