Water Pump

_• Install the water pump cover, being careful of the two dowel pins [A].

Torque - Water Pump Cover Bolts: 9.8 N·m (1.0 kgf·m, 87 in·lb)

Mechanical Seal Inspection

_• Visually inspect the mechanical seal.

If any one of the parts is damaged, replace the mechani-

cal seal as a unit.

○^{The sealing seat and rubber seal may be removed easily}

by hand.

Impeller Sealing Seat Surface [A] Rubber Seal [B]

Mechanical Seal Diaphragm [C]

Water Pump Housing Disassembly

_• Take the oil seal [A] out of the housing [B] with a hook [C].

_• Press the mechanical seal [A] out of the housing with a bearing driver [B].

Special Tool - Bearing Driver Set: 57001-1129

Water Pump Housing Assembly

_• Apply high-temperature grease [A] to the new oil seal [B].

_• Press the oil seal into the housing with a bearing driver so

that the seal surface is flush [C] with the end of the hole.

_• Press the new mechanical seal into the housing with the oil seal driver [D] until its flange [E] touches the surface

[F] of the housing.

Special Tool - Oil Seal Driver: 57001-1660

Impeller Assembly

_• Clean the sliding surface of the mechanical seal with a high-flash point solvent, and apply a little coolant to the

sliding surface to give the mechanical seal initial lubrica- tion.

_• Apply coolant to the surfaces of the rubber seal [A] and

sealing seat [B], and install the rubber seal and sealing

seat into the impeller by pressing them by hand until the seat stops at the bottom of the hole.

Pump Impeller Inspection

_• Visually check the impeller [A].

If the surface is corroded, or if the blades are damaged,

replace the impeller (see Water Pump Removal).

Radiator and Radiator Fan Removal

_• Drain the coolant (see Coolant Change in the Periodic Maintenance chapter).

_• Remove:

Center Fairings (see Center Fairing in the Frame chap-

ter)

Reserve Tank (see Coolant Change in the Periodic Main- tenance chapter)

Radiator Fan Motor Connector [A] (Disconnect) Radiator Hose Clamp Screw [B] (Loosen)

_• Loosen:

Radiator Hose Clamp Screw [A]

_• Remove: Radiator Bolt [B]

_• Pull [A] the radiator [B] toward the left, noting the baffle plate [C] on the cylinder head cover.

_• If necessary, remove:

Radiator Fan Mounting Bolts [A]

Radiator Fan [B]

Radiator

Radiator and Radiator Fan Installation

_• Install the radiator [A] to the frame.

○^{Align [B] the projection on the frame with the hole on the}

radiator.

○^{Tighten the radiator bolt [C].}

○^{Note the baffle plate on the cylinder head cover when}

installing the radiator.

○^{Position the radiator hose clamp screws [D] as shown.}

Radiator Inspection

_• Check the radiator core.

If there are obstructions to air flow, remove them.

If the corrugated fins [A] are deformed, carefully straighten them.

If the air passages of the radiator core are blocked more than 20% by unremovable obstructions or irreparably de- formed fins, replace the radiator with a new one.

Radiator Cap Inspection

_• Remove:

Reserve Tank (see Coolant Change in the Periodic Main-

tenance chapter) Radiator Cap

_• Check the condition of the bottom [A] and top [B] valve

seals and valve spring [C].

If any one of them shows visible damage, replace the cap with a new one.

_• Install the cap [A] on a cooling system pressure tester [B].

NOTE

○^{Wet the cap sealing surfaces with water or coolant to}

prevent pressure leaks.

_• Watching the pressure gauge, pump the pressure tester to build up the pressure until the relief valve opens: the

gauge needle flicks downward. Stop pumping and mea- sure leak time at once. The relief valve must open within the specified range in the table below and the gauge hand must remain within the same range at least 6 seconds.

Radiator Cap Relief Pressure

Standard: 112.3  141.7 kPa (1.15  1.45 kgf/cm², 16.3

 20.5 psi)

If the cap can not hold the specified pressure or if it holds too much pressure, replace it with a new one.

Radiator Filler Neck Inspection

_• Remove the reserve tank (see Coolant Change in the Pe- riodic Maintenance chapter).

_• Remove the radiator cap.

_• Check the radiator filler neck for signs of damage.

_• Check the condition of the top and bottom sealing seats

[A] in the filler neck. They must be smooth and clean for

the radiator cap to function properly.