TP-6591 10/13 31Section 3 Scheduled Maintenance
Seawater Flow Switch Inspection and Cleaning
Procedure:
1. Push the generator set power button OFF.
2. Disconnect power to the battery charger, if
equipped.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
1
1. Bonnet assembly
2. Stem
3. Spring
4. Shuttle
5. Retaining clip
6. O-ring
7. Housing
2
4
3
6
5
7
Figure 3-11 Flow Switch Assembly
4. Firmly grasp the housing and turn the bonnet
assembly 45_ counterclockwise (as indicated on
the top of the bonnet) to unlock the mating tabs on
the two parts. See Figure 3-11.
5. Pull the bonnet assembly out of the housing. Be
careful not to pull on the lead wires.
6. Clean the shuttle, stem, spring, retaining clip, and
inside of the housing by lightly scraping and/or
wiping away any debris or buildup.
7. Check the O-ring, bonnet assembly, shuttle, and
spring for any damage. Replace the flow switch, if
necessary.
8. Reassemble by ensuring the spring is set within the
clips on the shuttle cap.
9. Reposition the O-ring in the counter-bored
shoulder of the housing.
10. Insert the bonnet assembly into the housing,
allowing the tabs on the bonnet to clear the mating
lugs on the housing. Ensure bonnet stem end
aligns with centering feature in the housing.
11. Lock the bonnet assembly by firmly grasping the
housing and turning the bonnet 45_ clockwise as
indicated on the top of the bonnet. This engages
the mating tabs on the two parts.
12. Reconnect the engine starting battery, negative (--)
lead last.
13. Reconnect power to the battery charger, if
equipped.
3.7.5 Belt Tension
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
areinplace.
Moving parts.
WARNING
Servicing the generator set when it is operating. Exposed
moving parts can cause severe injury or death. Keep
hands, feet, hair, clothing, and test leads away from the belts
and pulleys when the generator set is running. Replace
guards, screens, and covers before operating the generator
set.
Check the belt tension at the interval specified in the
service schedule. If tension is not within the
specifications, adjust as necessary using the following
procedures.
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