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TP-6200 10/12140 Section 3 Scheduled Maintenance
3.4 Alternator Bearing Service
Have an authorized service distributor/dealer perform
service.
3.4.1 20--300 kW Models
Replace the end bracket bearing every 10,000 hours of
operation in standby and prime power applications.
Service the bearing more frequently if the annual
inspection indicates excessive rotor end play or bearing
damage. Replace the tolerance ring, if equipped,
following end bracket removal. The sealed end bracket
bearing requires no additional lubrication.
3.4.2 300--2250 kW Models with
Single-Bearing Alternator
The alternator bearing requires lubrication at intervals
specified in the generator set technical manual. Use
Chevron SRI or equivalent antifriction, high-quality
grease with a lubrication temperature range of --30°Cto
175°C(--22°F to 350°F).
3.4.3 1250 kW and Larger Models with
Two-Bearing Alternator
Refer to the generator set service manual for bearing
maintenance information.
3.5 Diesel Fuel Systems
3.5.1 Bleeding Air from Fuel System
Bleed air from the fuel system after fuel system
maintenance, such as replacing the fuel filter(s). Use
the hand prime pump kit, when equipped. The hand
prime fuel pump eliminates the need for cranking the
engine to bleed air from the fuel system.
Note: Bleed air from the fuel system according to the
engine manufacturer’s instructions. Trapped air
in the fuel system causes difficult starting and/or
erratic engine operation.
Note: Correct any fuel leaks encountered during the
priming procedure.
1. Place the fuel valves in the fuel system prime
position. Close the fuel valve located between the
pipe tee and the engine. Open the fuel valves on
each side of the fuel prime pump. See Figure 3-1.
Note: The illustration shows a generator set
without a fuel/water separator. The valve
location and position for a generator set
equipped with a fuel/water separator is
similar.
2. Loosen the bleed screw at the engine. Refer to the
engine operation manual for location of the bleed
screw(s). The bleed screw allows air to be expelled
from the fuel system when the hand prime pump is
operated.
3. Rotate the hand prime pump handle
counterclockwise until fuel flows from the bleed
screw. Stop pumping.
4. Tighten the bleed screw. Wipe up any fuel leakage.
5. Place the fuel valves in the normal operation
position. Open the fuel valve located between the
pipe tee and the engine. Close the fuel valves on
each side of the fuel prime pump.
PK-272000-H
Valve Open Valve Closed
Close this Valve
Open this Valve
Open this Valve
Figure 3-1 Hand Prime Pump with Valve Positions
for Fuel Priming (generator set without a
fuel/water separator shown), Typical