2007 YAMAHA WR 450F water pump

4 - 63
ENG
OIL FILTER, WATER PUMP AND CRANKCASE COVER
(RIGHT)
EC4G5220
Impeller shaft
1. Install:
Impeller shaft 1
Plain washer 2
Impeller 3
NOTE:
Take care so that the oil seal lip is not dam-
aged or the spring does not slip off its posi-
tion.
When installing the impeller shaft, apply the
engine oil on the oil seal lip, bearing and
impeller shaft. And install the shaft while
turning it.
Hold the impeller shaft on its width across
the flats a with spanners, etc. and install the
impeller.
T R..14 Nm (1.4 m · kg, 10 ft · lb)
Crankcase cover (right)
1. Install:
Dowel pin 1
O-ring 2
Collar 3
Gasket 4
New
New
2. Install:
Crankcase cover (right) 1
Bolt 2
Bolt
NOTE:
Apply the engine oil on the impeller shaft
end.
When installing the crankcase cover onto the
crankcase, be sure that the impeller shaft
end 2 aligns with the balancer end slot 3.
Tighten the bolts in stage, using a crisscross
pattern.
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)

4 - 64
ENG
OIL FILTER, WATER PUMP AND CRANKCASE COVER
(RIGHT)
Kick crank
1. Install:
Kickstarter 1
Plain washer
Bolt (kickstarter)
NOTE:
Install so that there is a clearance a of 8 mm
(0.31 in) or more between the kickstarter and
frame and that the kickstarter does not contact
the crankcase cover when it is pulled.
T R..33 Nm (3.3 m · kg, 24 ft · lb)
2. Install:
Oil tank breather hose 1
Clamp 2
T R..2 Nm (0.2 m · kg, 1.4 ft · lb)
Water pump housing
1. Install:
Dowel pin 1
O-ring 2
New
2. Install:
Water pump housing 1
Bolt (water pump housing) 2
Plain washer 3
Coolant drain bolt 4
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)

4 - 65
ENG
OIL FILTER, WATER PUMP AND CRANKCASE COVER
(RIGHT)
3. Install:
O-ring
Coolant pipe 1
Bolt (coolant pipe) 2
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
Oil filter
1. Install:
Oil filter 1
O-ring 2
Oil filter cover 3
Bolt (oil filter cover)
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)

4 - 66
ENGBALANCER
BALANCER
BALANCER
Extent of removal:
1 Balancer drive gear
2 Balancer
Extent of removal Order Part name Q’ty Remarks
BALANCER REMOVAL
Preparation for removal Clutch housing Refer to “CLUTCH” section.
Crankcase cover (right) Refer to “OIL FILTER, WATER PUMP
AND CRANKCASE COVER (RIGHT)”
section.
Stator Refer to “AC MAGNETO AND
STARTER CLUTCH” section.
1 Nut (balancer) 1
Refer to “REMOVAL POINTS”. 2 Nut (primary drive gear) 1
3 Nut (balancer driven gear) 1
4 Lock washer 1
5 Balancer 1
6 Straight key 1
2
1
2

4 - 70
ENGOIL PUMP
OIL PUMP
OIL PUMP
Extent of removal:
1 Oil pump removal
2 Oil pump disassembly
Extent of removal Order Part name Q’ty Remarks
OIL PUMP REMOVAL AND DIS-
ASSEMBLY
Preparation for removal Clutch housing Refer to “CLUTCH” section.
Crankcase cover (right) Refer to “OIL FILTER, WATER PUMP
AND CRANKCASE COVER (RIGHT)”
section.
1 Circlip 1
2 Plain washer 1
3 Oil pump drive gear 1
4 Oil pump assembly 1
5 Dowel pin 2
6 Outer rotor 2 1
7 Circlip 1
8 Inner rotor 2 1
9Pin 1
10 Oil pump cover 1
11 Outer rotor 1 1
12 Inner rotor 1 1
1
2