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Publication Title | Checking Exhaust Dome Alignment Model C30 MicroTurbine

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Text | Checking Exhaust Dome Alignment Model C30 MicroTurbine | 001


Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Telephone: (818) 734-5300 • Facsimile: (818) 734-5320 • Website:

Service Bulletin SB0042

Date: From: Subject:


All Model C30 MicroTurbine systems with Engine Serial Numbers 102170 and lower, supplied by Capstone Turbine Corporation®.

Safety Precautions

Only Capstone Authorized Serviced Providers (ASP’s) should open the MicroTurbine and other equipment connected to the MicroTurbine. The systems can include multiple sources of power. Observe and adhere to the Safety Instructions contained within the MicroTurbine manuals.


On the Model C30 MicroTurbine systems with Engine Serial Numbers 102170 and lower, the exhaust dome on the engine is a separate piece that is attached to the engine with a V-band clamp. If the exhaust dome is not centered and aligned correctly against the engine, the exhaust gas can leak around the dome, causing higher temperatures in the engine compartment, low output power or low system efficiency.

Action Required

Perform the following steps during the next scheduled site visit:

1. Check the system for symptoms such as low power, low efficiency, or high temperature inside the engine compartment (refer to C30 Performance Technical Reference for details). If any of these symptoms is detected, please note the TET, speed, ambient temperature, ambient pressure, and output power on the Field Service Report form and proceed to Step #2.

2. Command the MicroTurbine OFF and let the system enter the cool down cycle. Using a high temperature leak detection fluid, check for leaks around the V-band clamp, while the engine is operating without fuel in the cool down state. If a gross leak is detected, or bubbles are readily breaking out (small leaks are allowed and considered normal), then proceed to align the exhaust dome as explained in the following paragraphs.

450006-001 Rev A (September 2002) Page 1 of 4

This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.

September 2002

Capstone Technical Support

Checking Exhaust Dome Alignment Model C30 MicroTurbine


The exhaust dome leak problem on newer MicroTurbines is eliminated since the exhaust dome is welded to the engine.


Severe burns can occur since the thermal blanket and the exhaust dome are at very high temperatures at completion of the cool down cycle.

Image | Checking Exhaust Dome Alignment Model C30 MicroTurbine

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