5. MAINTENANCE & INSPECTION 51
(5) Checking the Impeller of Seawater
Pump
Depending on the use, the inside parts of the seawa-
ter pump deteriorate and the seawater discharge per-
formance drops. At the specified interval or when the
volume of discharged seawater is reduced, inspect
the seawater pump in accordance with the following
procedures;
1) Loosen the side cover bolts and remove the side
cover.
2) Illuminate the inside of the seawater pump with a
flashlight and inspect.
3) If any of the following problems are found, the dis-
assembly and maintenance are necessary:
• Impeller blades are cracked or nicked.
Edges or surfaces of the blades are marred or
scratched.
• Wear plate is damaged.
Removing the impeller
There are two kinds of special service tool for remov-
ing impeller:
• Puller A (Standard) 129671-92110
a) Remove the side cover of seawater pump.
b) Screw the puller A to the impeller.
c) Turn the M10 bolt of the puller clockwise and the
impeller will come out of pump body.
Note:
When replacing an used impeller with new one, pur-
chase an impeller with M18 thread. Turn the M18
screw side of the impeller to the cover side, and
install it.
• Puller B (Option) 129671-92100
A
B
M18 x 1.5
M10-length40
A
B
≒
110
≒
140
008424-00X
B
A
008425-00X
A
B