Replacement Parts, Maintenance

8.Perform a circuit test to verify proper circuit operation.

9.Replace the cover assembly O-ring if it has not been replaced within the last 90 days.

10.Reattach the cover on the base.

3. REPLACEMENT PARTS

The environmental housing contains surge arrestors and an O-ring which can be ordered for replacement as follows:

Part number: 1150083L1	4 surge arrestors and the
	insertion/extraction tool
Part number: 3273.010	O ring

4. MAINTENANCE

The T400 Single Environmental Housing requires no routine maintenance to function properly.

Electrical shock can occur if surge arrestor replacement is attempted before removing the powering modules.

In cases where lightning is the suspected cause of circuit pack failure, ADTRAN recommends replacing all surge arrestors within the environmental housing. The surge arrestors are field replaceable as detailed in section 2.

The cover assembly O-ring should be replaced if entry is gained and the O-ring has been in place for 90 days or longer.

5. WARRANTY AND CUSTOMER SERVICE

ADTRAN will replace or repair this product within ten years from the date of shipment, if the product does not meet its published specifications or if it fails while in service. For detailed warranty, repair, and return information, refer to the ADTRAN Equipment Warranty and Return Policy and Procedure.

Return Material Authorization (RMA) is required prior to returning equipment to ADTRAN. ADTRAN does not recommend that repairs be performed in the field.

For service, RMA requests, or further information, contact one of the following numbers:

ADTRAN Customer Service:
Applications Engineering	(800) 615-1176
(pre-sales support and inquiries)
Technical Support	(800) 726-8663
(post-sales; have unit serial number available)
Sales	(800) 827-0807
RMA (Repair Service)	(205) 971-8722

Repair and Return Address:

ADTRAN, Inc.

Customer Service Department

901 Explorer Boulevard

Huntsville, Alabama 35806-2807

Section 61150087L1-5, Issue 1

61150.087L1-5A