Sym Wolf SB 250 Ni Service Manual page 162

10. Cooling System
Water pump
Water pump seal / cooling
system leakage inspection
Remove drain bolt to drain some coolant to
●
check if there is greasiness in it.
Remove engine oil gauge rule to check if
●
the oil is emulsified.
If the two phenomena appear, oil seals of
water pump, cooling system, cylinder head, or
cylinder gasket could be damaged. Please
remove right crankcase to check (replace)
water pump oil seals, then inspect cylinder
head and cooling system.
Water pump removal
Remove drain bolt and drain out coolant.
Remove the water hose.
Remove four water pump bolts and cover.
Remove gasket and dowel pin.
Remove 12 right crankcase bolts and the
crankcase.
Remove gasket and dowel pin.
Hold water pump drive shaft and remove
water pump rotor clockwise.
Caution
The rotor is provided with left turn
●
thread.
Remove circlip from right crankcase.
Remove water pump shaft and inner bearing.
Remove the outside bearing by inner bearing
puller.
Rotate the inner ring of bearing, the bearing
shall move smoothly and quietly.
If the bearing does not rotate smoothly or
produces a noise, replace it with new one.
10-8
Drain bolt
rotor
Water pump shaft