DS 19 OPERATION No. DS 231-1: Replacement of a water pump and low pressure pump. Op. DS 231-1 146
PARTICULAR POINTS
8 Since October 1957, the pumps are fitted with a new impeller (marked with No. DS 231-7 on the outer face). These pumps should befitted with a new
type cover, which has a groove provided for securing the water outlet hose.
9 Measure the distance “d” on the pump and fit spacing washer under the pulley (when fitting the above on a new pump) in order to obtain the same
dimensions at “d” (see Pl. 37).
13 Adjust the tension of the belts: High-pressure pump = 22 ft/lb (3 m.kg), Dynamo 28 ft/lb (4 m.kg) (see Pl. 35).
14 Tighten the fan fixing screws to 72 ft/lb (1 m.kg) maximum.
16 Refill the radiator (open the heater vane and bleed the system).
17 Start the engine, check the adjustment of clutch drag (see Op. DS 314-0) and make sure that the hot water circulates.
TOOLS
REMOVAL (see Pl. 37).
1 Drain the radiator and pipes, save the water which contains anti-freeze.
2 Disconnect the radiator tie-bar without disconnecting the feed pipe to the high pressure pump . . . . . . . . . . . . . . 8-12 mm box spanners
3 Remove the fan 12 mm box spanner
4 Disconnect the adjusting rods of the dynamo and high pressure pump from the water pump. Slacken the water
pump belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
5 Disconnect the feed and return pipes from the low pressure pump, (spanner 2220-T, see Pl. 72, fig. 4) . . . . . . . Spanner 2220-T
6 Disconnect the water pump feed pipe.
7 Disconnect the water pump with its cover (4). Remove the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm box spanner
8 Scrape the joint face.
NOTE - Since October 1957, the water pumps are fitted with a new type impellor and new cover which has a water
passage of different section than that of the old type cover. The new pumps (fitted with an impellor worked with
No. DS 231-7 on the outer face (c) must be fitted with the new cover having a groove on the water outlet.
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