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3 servicing the apu, Maintenance – Alpha Technologies AlphaGen 5.0kW Auxiliary Power Unit User Manual

Page 40

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3. Maintenance

40

031-132-B0-001 Rev. A

TM

©2000

3.3 Servicing the APU

Some tools and equipment may be required such as:

• Phillips screwdriver

• 10 mm socket wrench

• 3/8 inch open socket wrench

• DVM capable of displaying true RMS AC voltage and frequency

(i.e., Fluke 87)

• Battery operated frequency counter (needed only if a frequency

reading DVM is not available).

Some components on the APU are front accessible and do not require

removing the APU during servicing:

Air filter replacement

Rectifier replacement

Oil filter

Spark plug replacement

Oil fill

Dual fuel load block (Propane/Natural Gas)

Demand regulator pressure tap

Electrical interface connections

If the APU has to be replaced because of failure, follow the procedures outlined

in Section 3.16 "Removal and Replacement of Generator Set".

CAUTION:

If unit is being serviced immediately after the

generator has been in operation, allow sufficient

time for Engine components to cool to prevent

personnel from being injured or burned from the

exhaust system.