Alternator Bearing Service; Kw Models; 300-1000 Kw Models With 4M/5M/7M Single-Bearing Alternator; Diesel Fuel Systems - Kohler APM402 Operation

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. Service the bearing more frequently if the annual inspection
indicates excessive rotor end play or bearing damage. The sealed end bracket bearing requires no additional lubrication.
3.4.2

300-1000 kW Models with 4M/5M/7M Single-Bearing Alternator

The alternator bearing requires lubrication at intervals specified in the alternator operation and maintenance manual. Use
Chevron SRI or equivalent antifriction, high-quality grease with a lubrication temperature range of -30°C to 175°C (-22°F to
350°F).
Refer to the List of Related Literature for the alternator operation and maintenance manuals.

3.5 Diesel Fuel Systems

WARNING
The fuel system. Explosive fuel vapors can cause severe injury or death. Vaporized fuels are highly explosive. Use extreme
care when handling and storing fuels. Store fuels in a well-ventilated area away from spark-producing equipment and out of the
reach of children. Never add fuel to the tank while the engine is running because spilled fuel may ignite on contact with hot parts
or from sparks. Do not smoke or permit flames or sparks to occur near sources of spilled fuel or fuel vapors. Keep the fuel lines
and connections tight and in good condition. Do not replace flexible fuel lines with rigid lines. Use flexible sections to avoid fuel
line breakage caused by vibration. Do not operate the generator set in the presence of fuel leaks, fuel accumulation, or sparks.
Repair fuel systems before resuming generator set operation.
Draining the fuel system. Explosive fuel vapors can cause severe injury or death. Spilled fuel can cause an explosion.
Use a container to catch fuel when draining the fuel system. Wipe up spilled fuel after draining the system.
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 31.
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.
82
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling, storing, and using fuels.
TP-6694 9/20