4-10 COOLING SYSTEM

Water Pump

Water Pump Removal

•Refer to the Oil Pump Removal in the Engine Lubrication System chapter.

Water Pump Installation

•Refer to the Oil Pump Installation in the Engine Lubrication System chapter.

Water Pump Inspection

•Remove the left lower fairing (see Lower Fairing Removal in the Frame chapter).

•Check the drainage outlet passage [A] at the bottom of the water pump body for coolant leaks.

If the mechanical seal is damaged, the coolant leaks through the seal and drains through the passage. Replace the mechanical seal unit (see Water Pump Housing Disassembly/Assembly).

Water Pump Impeller Disassembly/Assembly

•Remove the water pump impeller (see Oil Pump Removal in the Engine Lubrication System chapter).

•The sealing seat and rubber seal may be removed easily by hand.

•Apply coolant around the surfaces of the rubber seal and sealing seat.

•Install the rubber seal [A] and sealing seat [B] into the impeller by pressing them by hand until the seat stops at the bottom of the hole.

•Install the water pump impeller (see Oil Pump Installation in the Engine Lubrication System chapter).

Water Pump Impeller Inspection

•Remove the water pump cover (see Oil Pump Removal in the Engine Lubrication System chapter).

•Visually inspect the impeller [A].

If the surface is corroded or if the blades are damaged, replace the impeller.

Water Pump Housing Disassembly

CAUTION

Do not damage the hole wall of the water pump housing.

•Insert a bar [A] into the pump housing [B], and hammer evenly around the circumference of the mechanical seal bottom [C].

COOLING SYSTEM 4-11

Water Pump

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

Water Pump Housing Assembly

CAUTION

Do not reuse the mechanical seal and oil seal.

•Apply high-temperature grease to the oil seal lips [A].

•Press the new oil seal into the housing with a bearing driver [B] until it stops at the bottom surface [C] of the housing.

Special Tool - Bearing Driver Set: 57001-1129

CAUTION

Be careful not to damage the sealing surface of the mechanical seal.

•Press the new mechanical seal into the housing with the oil seal driver [A] until its flange [B] touches the surface [C] of the housing.

Special Tool - Oil Seal Driver: 57001-1660

Mechanical Seal Inspection

•Remove the impeller (see Oil Pump Removal in the Engine Lubrication System chapter).

•Visually inspect the mechanical seal.

If any one of the parts is damaged, replace the mechanical seal as a unit.

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

Mechanical Seal [C]