COOLING SYSTEM-M.3 pressure will press the pulley on the shaft, a re- placement pulley and lor shaft should be fitted. 8. Ensure that the carbon sealing face of the seal (9) is clean and fit the seal squarely in its housing. 9. Check that the sealing face of the counterface (7) is clean and position the counterface, by hand only, with the sealing insert registering with the carbon face of the seal. 10. With the pump resting on the front end of the shaft and the pump body unsupported, press on the impeller (6) until the rear face of the impeller vanes is 0.000/0.006 in (0,00/0,15 mm) below the rear face of the body.
0.029/0.033 in (0,74/0,84 mm) To Assemble the Combined Bearing and Shaft Type Pump (Fig. M.4) 1. Press the bearing and shaft assembly (8) into the pump body (2), with the smaller diameter end to- wards the rear, until the retaining clip grooves of the bearing and body align. Fit the retaining clip (7). 2. Locate any pump securing setscrews that cannot be fitted after the pulley (1) is in position and press the pulley on to the shaft until the front end of the pulley is flush with the front end of the shaft. 3. Press the thrower (6) into its position on the shaft. 4. Ensure that the carbon face of the seal (5) is clean and fit the seal squarely into its housing. 5.
Check that the sealing face of the counterface (4) is clean and position the counterface, by hand only, with the sealing insert registering with the carbon face of the seal. 6. With the pump resting on the front end of the sheft and the pump body unsupported, press on the impeller (3) until the rear face of the impeller vanes is 0.000/0.006in (0,00/0,15 mm) below the rear face of the pump body. M5 4. Examine the water pump seal, counterface or insert for excessive wear, scoring or cracks on the sealing faces. Renew where necessary. 5. Remove rust and scale from the impeller and ex- amine for excessive corrosion or other damage. Renew where necessary. 6.
Examine the pump pulley for signs of cracks, corrosion or any other damage. Renew where necessary. To A.ssemble the Separate Bearing Type (fig. M.3) I NOTE: On later pumps items 4, 5, 0 and 1 are no longer fitted and a longer distance piece has been introduced to accommodate the removal of the seal retaining flange (4). To A.ssemble Earlier This is the same procedure as for the later types de- tailed above except for the following points. Before assembly, thoroughly clean the insert recess and drain hole in the body with cleaning spirit or Locquic 'Q'. 1. Position the thrower (10) in its compartment in the pump body (3) with the central protrusion of the thrower towards the rear. 2.
Insert the seal retainer (5) and position the felt seal (11) and seal retaining flange (4) with the dish of the flange towards the felt seal. 3. Press the bearings (12) and distance piece (2) on to the shalt (8) with the shielded faces of the bearings facing outwards to the front and rear ends of the shaft and three quarters fiJi the bear- ings and space between the bearings with high melting point grease. 4. Press the bearings and shaft assembly into the body, ensuring that the shaft passes through the thrower. Fit the retaining circlip (13). 5. Press the thrower into its position on the shaft. 6. Locate any pump securing setscrews that cannot be fitted after the pulley (1) is in position.
7. Press the pulley on to the shaft until it abuts the front bearing and where applicable, fit the pulley circlip (4). When the pulley is fitted during pro- duction, a pressure of 2~ - 3 tonflin 2 (3,94/4.73 kgflmm2) is required. If a substantially reduced After fitting the bearings and shaft assembly and the thrower, lightly coat the locating diameter of the insert (1) and the inner diameter of the insert recess with grade 'AVV' Loctite. Ensure that the counterface (2) is clean and press the insert home with the cQunterface to the rear of the pump. Clean off any surplus Loctite. When pressing in the insert, ensure that the sealing face of the counterface is not damaged.
Check that the carbon face of the seal (3) is clean and position the seal with this face registering on the counterface. With the pump resting on the front end of the shaft and the body unsupported, press on the impeller until the rear face of the impeller vanes is 0.029/0.033 in (0,7410,84 mm) below the rear face of the pump. On earlier pumps where the seal face registers directly on to the insert with no counterface fitted, the impeller should be pressed on to the shaft until the clearance between the front face of the impeller and the water pump body. is 0.005/0.010 in (0,12/0,25 mm). This can be checked by means of a feeler gauge through the outlet channel of the pump body.