Yanmar BY Series Service Manual page 173

Repair
12/05
Remove and Install Seawater Pump
1. Disconnect battery negative (-) cable.
2. Remove seawater pump belt. See Replace
Seawater Pump Belt on page 7-19.
3. Disconnect seawater supply hose from
seawater pump.
4. Disconnect seawater pump-to-hydraulic oil
cooler pipe (Figure 7-27, (1)).
Figure 7-27
( 2 )
( 1 )
Figure 7-27
5. Remove three bolts (Figure 7-27, (2)) and
remove seawater pump.
6. Repair as necessary.
7. Installation is in the reverse of removal.
8. Install seawater pump belt. See Replace
Seawater Pump Belt on page 7-19.
9. Connect battery negative (-) cable.
BY Service Manual
Replace Seawater Pump Belt
1. Disconnect battery negative (-) cable from the
battery.
2. Remove belt guard.
3. Check belt tension. If belt is loose, it must be
replaced.
4. Cut seawater belt to remove.
5. Install new belt on crankshaft pulley and around
seawater pump pulley as far as possible.
6. Install belt removal tool (Figure 7-28, (1))
between seawater pump pulley and belt.
Figure 7-28
0006551
7. CAUTION! Pinch Hazard. ALWAYS use care
not to catch finger between belt and pulley
while installing belt. Roll the belt onto the
pulley by rotating crankshaft using a socket and
breaker bar on the crankshaft pulley bolt
(Figure 7-28, (2)). Lift end of tool while rotating.
NOTICE: Ensure belt is correctly engaged in all
grooves of both pulleys.
8. Install belt guard.
9. Connect battery negative (-) cable. Start engine
and verify pump operation.
© 2009 Yanmar Marine International
COOLING SYSTEM
( 1 )
Figure 7-28
( 2 )
0003691
7-19