Owner’s Manual for Stationary Industrial Generators 19
Section 4 Maintenance
4.1 — Maintenance Schedule
Periodic inspection, service, and maintenance of this unit is critical in ensuring its reliable operation. The following is
the manufacturer’s recommended maintenance schedule. The established intervals are the maximum required when
the unit is used in typical standby service applications (approximately 200 hours per year). The maintenance items will
need to be performed more frequently if the unit is used in severe applications (such as long duration outages, very
high or very low ambient conditions, or extremely dirty/dusty environments). Use the unit hour meter or calendar time,
whichever occurs first, from the previous maintenance interval to determine the next required maintenance interval.
Note that some checks are based on hours of operation.
There may be times when the generator must operate continuously for long periods of time (for example, extended util-
ity outages). During such extended operational periods some items will require more frequent checking (based on
hours). Use the “Extended Run-Time Maintenance Checks” recommendation for such periods of operation.
Be sure to follow all applicable safety and caution statements found in the unit operating manual or engine service/
maintenance manual before performing any maintenance checks or service.
This maintenance schedule reflects the minimum tasks that need to be accomplished to ensure that the unit remains
operational. A repair shop or person of the owner’s choosing may maintain, replace, or repair emissions-control
devices and systems. Some maintenance that is non-emissions related may be performed by an authorized operator
and other maintenance must be performed by an Authorized/Qualified Service Dealer Technician.
NOTE: An authorized operator is one who has been trained by a Manufacturer Authorized Service Dealer in the
proper operation and inspection of this standby generator set.
4.1.1— Service Maintenance Intervals
Extended Run-Time Maintenance Checks: Daily checks which must be performed when the unit is operated contin-
uously for extended periods of time. These checks and routine monthly checks can be performed by an authorized
operator.
NOTE: For units equipped with a gearbox, the gearbox oil should be checked monthly or every 100 hours of
operation.
1A. A one-time post installation, initial operation, service inspection of the generator set to ensure it is ready to oper-
ate, transfer to, and carry the load when required, and to identify any potential problem areas. Performed ONLY
ONCE following the first three months or the first 50 hours of operation after installation/startup of the unit and
requires approximately 2.5 hours per unit to complete.
The various service maintenance intervals are designated by interval numbers:
1. A frequent, periodic inspection of the generator set to ensure it is ready to operate when required and to identify
any potential problem areas. Performed monthly, or every 24 hours (interrupted) of operation of the unit, and
requires approximately 0.5 hours per unit to complete.
2. An operational service inspection of the generator set to ensure it is ready to operate and carry the load when
required, and to identify any potential problem areas. Performed semi-annually (6 months) or every 100 hours of
operation of the unit and requires approximately 1.5 hours per unit to complete.
3. A mid-level service inspection of the generator set to ensure it is ready to operate and carry the load when
required, and to identify any potential problem areas. Performed annually or every 200 hours of operation of the
unit and requires approximately 6.0 hours per unit to complete.
4. A comprehensive service inspection of the generator set to ensure it is properly serviced and ready to operate
and carry the load when required, and to identify any potential problem areas. Performed biannually (every 24
months or 500 hours) and requires approximately 8.0 hours per unit to complete.
NOTE: Maintenance levels 2, 3, and 4 require the use of the applicable engine service manual and must be per-
formed by a qualified service technician.
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