NACIONAL MOTOR Derbi Euro 3, Руководство по ремонту

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- Use tool number 13 (see special tools list) to insert the in-
ner oil seal (4) with the spring downwards. Use tool num-
ber 12 to fit the top oil seal (5) with the spring upwards.
Both seals should be lightly greased.
- Fit the 5.25 x 15 x 1 washer (6), the pump runner (7)
and the securing nut (8). Tighten to a torque of 0.35-0.45
m.kg.
- Through the inside of the cover fit the 8.3 x 14 x 1 washer
(9), the key (10), the pump driving pinion (11), the 8.3 x 14
x 1 washer (12) and the circlip (13).
- Fit the transmission cover with a new gasket and refill
the engine crankcase with 650 c.c. of SAE 10W40 API GL-
4 type oil.
- Fit a new water pump cover gasket.
- The cooling system should then be refilled and pur-
ged according to the following procedure:
1. Prepare an external feed tank with -18ºC freezing
point coolant positioned at a height of approximately
2m from the ground, with the aim of filling the cooling
system from the expansion tank.
2. Start up the engine and keep it ticking over.
3. Open the feed tank tap and let the coolant flow fre-
ely until it reaches the minimum level in the cooling
system expansion tank.
Close the tap.
4. Close the expansion tank valve cap.
Warm up the engine until the thermostat opens.
5. Check that the body of the radiator warms up. If it
fails to do so, this is an indication that the thermostat
has not opened or that there are air locks inside the
cooling system circuit.
6. Turn off the engine and allow to cool.