Yanmar 6LY3 series Service Manual

COOLANT SYSTEM
Seawater Pump Components and Functions
7-6 6LY3 Service Manual
© 2007 Yanmar Marine International
SEAWATER PUMP
COMPONENTS AND
FUNCTIONS
The seawater pump (Figure 7-2) has a rubber
impeller. The seawater pump is installed to the
drive shaft housing and is driven by a gear.
Figure 7-2
Figure 7-2
Disassembling the Seawater Pump
1. Remove the rubber hose from the seawater
pump outlet (Figure 7-3, (14)).
Figure 7-3
Figure 7-3
1 – Heat Exchanger
2–O-Ring
3–Impeller
4 – Mechanical Seal
5–O-Ring
6 – Seawater Inlet
7 – Pump Drive Gear
8–O-Ring
9 – Drive Shaft Housing
10 – Pump Gear Nut
11–Seawater Pump Body
12–Wear Plate
13–End Cover
14–Seawater Pump Outlet
2. Remove the seawater pump assembly from the
drive shaft housing (Figure 7-3, (9)).
3. Remove the seawater pump end cover
(Figure 7-3, (13)).
Seawater Pump Performance Specifications
Flow
Minimum 215 L / min. (57 gal) at
In = -0.4 bar (-6 psi)
Out = 1.2 bar (17.5 psi)
2933 rpm
after 100 hours of duty
Self-Priming Ability
Maximum 10 seconds at
suction head = 0.5 m (1.5 ft)
length of pipe = 0.6 m (1.9 ft)
622 rpm
Tightness Test
4 bar water (58 psi)
Leakage from seal:
Maximum 0.03%
Seawater Pump Durability Specifications
Impeller
Flow Drop
Minimum 1500 hours
Maximum 10% after
1000 hours
Water Lip Seal Minimum 1000 hours
Wear Plate End Cover Minimum 1500 hours
Other Parts Minimum 3000 hours
0006201
0006202
(1)
(13)
(14)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)

Yanmar 6LY3 series Specifications

General

Brand	Yanmar
Model	6LY3 series
Category	Engine
Language	English