Service Manual

4-12 C OOLING SYSTEM
Water Pump
If the coolant still leaks through the drainage outlet hose,
the seal and ball bearings is probably damaged. Replace
the mechanical seal, ball bearings, and oil seal by splitting
the crankcase.
•
Split the crankcase (see Crankshaft/Transmission chap-
ter).
•
Remove the water pump impeller.
•
Pull out the water pump shaft from the inside of the right
crankcase.
•
Take the bearing [A] out of the r ight crankcase, using the
bearing r emover.
Special Tools - Bearing Remover Shaft: 57001-1265 [B]
Bearing Remover Head: φ10 × φ12: 57001
-1266 [C]
•
Using a t hin-bladed screwdriver, pry out the oil seal.
•
Press out the mechanical seal [A] and ball bearing [B]
from the inside of the right crankcase with the bearing
driver set [C ].
Special Tool - Bearing Driver Set: 57001-1129
○
Be sure to replace the m echanical seal, oil seal, O-ring,
and ball bearings with new ones because these parts will
be damaged by removal.
•
Apply plenty of high temperature grease to the oil seal
lips.
•
Apply oil to the outer circumference of the oil seal.
•
Press the oil seal [A] into the hole from the inside of the
right crankcase with the bearing driver set so that the
spring side of the seal lips is toward the inside of the
crankcase.
Special Tool - Bearing Driver Set: 57001-1129
•
Press the oil seal in until the seal end is even with step
[B] of the hole as shown.
○
Use the bearing driver which has a larger diameter than
the oil seal.
•
Press in each ball bearing [C] with its manufacturer’s mark
facing out until it bottoms out.
•
Press [A] the mechanical seal [B] by using a suitable 28
mm socket [C] and a bearing driver [D] until its flange
touches the step [E].
Gap [F]
•
Install the water pump shaft from the inside of the right
crankcase.
Special Tool - Bearing Driver Set: 57001-1129