Assembling The Seawater Pump - Yanmar 6LY3 series Service Manual

COOLANT SYSTEM

Assembling the Seawater Pump

1. When replacing the mechanical seal, coat the
sliding surface with a good quality silicon oil. Do
not scratch any surfaces.
2. Coat the lip seal with grease and insert.
3. Install the pump shaft, ball bearing and gear
assembly to the pump unit and secure the
bearing stop ring. NOTICE: Coat the shaft with
grease before installing.
4. Install the O-ring.
5. Install the pump drive gear and retighten the
pump drive gear nut to the specified torque.
Pump Drive Gear Nut Torque
73-83 N·m (53-61 lb-ft)
6. After inserting the mechanical seal, install the
wear plate and impeller.
7. Coat the inside of pump body impeller housing
with grease.
8. Insert the impeller (Figure 7-6, (2)) into the
pump body. See Figure 7-6, (1) for impeller
rotation. Impeller threads are toward the cover.
Figure 7-5
(1)
Figure 7-5
1 – Cover
7-8
Seawater Pump Components and Functions
Figure 7-6
1 – Impeller Rotation
2 – Impeller
9. Install the O-ring between the pump body and
end cover.
0006204
© 2007 Yanmar Marine International
(1)
(2)
0006205
Figure 7-6
6LY3 Service Manual