Product Manual B

5. Maintenance3-2018
71A051X877 (Issue 7) Copyright © 2018 Cummins Inc.
Maintenance Items
After Every
24 Hours
of Run
Time
1
After Every
50 Hours
of Run
Time
12 Months or
After 250
Hours
2
2 Years or
After 500
Hours
2
Replace cooling system coolant.
Check coolant sensor for
damage and debris.
■
1
This interval is based on generator run time: daily in an outage or after every 24 hours of
run time.
2
To be performed by a qualified Service Technician.
3
Cleaning schedule may be reduced depending on operating conditions/environment.
4
After the initial 50 hour interval and every 250 hours thereafter.
5.3 Exercising the Generator Set
NOTICE
Audible engine RPM variation may be heard when there is no load applied.
This is normal and does not affect the generator set performance.
Exercising the generator set drives off moisture, relubricates the engine, and
removes oxides from electrical contacts. The result is better starting, more reliable
operation and longer engine life.
The generator set exerciser mode defaults are as follows.
• Day: Tuesday
• Time: 2:00 pm
• Period: Monthly
• Run Time: 5 minutes
Refer to the Exercise Settings section of this manual for more information on setting
up the exerciser.
5.4 Engine Oil
Recommended Engine Oil
Check the oil level prior to starting the generator set to verify that the oil level is
between the High and Low marks. The generator set is shipped with engine oil.
The use of quality engine oils combined with appropriate oil and filter change
intervals are critical factors in maintaining engine performance and durability.
Cummins Inc. recommends the use of a high quality SAE 5W-40 GEO (all
ambients) or SAE 15W-40 GEO (above 40 °F [4 °C]) engine oil for natural gas
engines. In addition, oil needs to conform with CES 20085. Refer to the Model
Specifications section for oil specification details.