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         Procedure                 Forms                     Inspection Form Requirements

USEM WARRANTY PROCEDURE

1. The product to be considered for warranty repair or replacement should be delivered to an Authorized Service Station for  inspection and warranty evaluation. Warranty policy coverage does not include the pick-up of units or on-site inspections, unless authorized by the Product Service Department with a log (authorization) number.

2.Check the unit's date code to determine if the unit is within the warranty period per policy. Any deviation from this policy must be authorized by a Product Service Department issued log number.

3. Inspect the unit for both the cause of failure and repair requirements. Determine whether the product failure was caused by a defect in materials or workmanship, and thus warrantable under policy definition.

4. If the customer disputes your warranty decision, contact the USEM Product Service Department to reach a resolution.

5. If the product failure is determined to be caused by a warrantable defect, and the product date code indicates the unit is  within the warranty period, proceed as follows:

a.) Minor repairs should be carried out per the Warranty Allowance Sheets included in this manual. Any deviation must be authorized by the Product Service Department.

b.) Major repairs (rewinds) or unit replacements should be carried out per the Warranty Allowance Sheets included in this manual. Generally, Standard Open Dripproof motors through 320 frame ratings, and Standard TEFC motors through 280 frame ratings, should be replaced rather than rewound when stock is available. This will vary depending upon motor RPM, special features, explosionproof, etc. Refer to the USEM Product Service Department if you have any questions.

c.) Invoice/Warranty Repair Report for warranty replacement units must be accompanied by the nameplate from the failed unit.

d.) Any warranty repair expense that is anticipated to be in excess of the allowable amount and/or $2,000.00 requires pre-authorization by the Product Service Department (log number authorization).

e.) Contact the Product Service Department prior to replacing thrust bearing(s) in vertical pump motors larger than 360 frame. USEM may wish to provide the replacement bearing(s).

WARRANTY REPORT FORMS

THE CORRECT MAILING ADDRESS IS:

Warranty claims should consist of an invoice from your service station to USEM, and a warranty report complete with the information available on the motor nameplate and the results of your repair.

Please note the following items as they correspond to the shaded areas on the example warranty report below:

1. CUSTOMER NAME AND ADDRESS.

2. COMPLETE UNIT ID NUMBER FROM NAMEPLATE ON MOTOR, GEAR REDUCER, AND DRIVE COMPONENT, AS APPLICABLE.

3. REASON FOR FAILURE, WITH ANY ADDITIONAL DETAILS LOGGED IN AREA PROVIDED.
   (See inspection report requirements and special TITAN product data sheet included in this manual).
   

   Titan service form:

4. TOTAL BILLING LISTING PARTS / LABOR CHARGES IN DETAIL. (LIST PARTS SEPARATE FROM LABOR CHARGES.)

5. SERVICE STATION NAME AND ADDRESS.

IN THE EVENT OF MOTOR REPLACEMENT, THE NAMEPLATE MUST BE REMOVED FROM THE MOTOR AND RETURNED ALONG WITH YOUR INVOICE AND WARRANTY REPORT.

Failure to provide any of the above information will result in a delay in processing your invoice. If you have any questions, please contact the Product Service Department at 800-566-1418. Warranty report forms may be obtained by contacting our Product Service Department.

INSPECTION REPORT REQUIREMENT

Purpose

The purpose of this requirement is to develop a comprehensive and systematic approach to collecting data from service stations performing warranty repairs on U.S. Electrical Motors' products.

Scope

This requirement will standardize the reporting procedure for all service shops performing warranty repairs on U.S. Motors' products. Sufficient data will be provided in these reports so that when compiled, the data will give meaningful statistics to identify field problems. First hand analysis of failure can provide vital information to aid in refinements which produce a better, more trouble free product. USEM relies on its Authorized Service Stations to provide this vital data from the field.

Repeat problems on the same or similar applications should be brought to the immediate attention of the Product Service Department in St. Louis. In these cases, the unit should remain intact until it is determined if failure analysis is required.

Repairs expected to cost in excess of $2000 must be brought to the attention of the Product Service Department. Prior authorization is required to proceed.

Application details on the Repair Report Form should be filled out. Of particular interest are part winding start, soft start, variable frequency drive, high inertia load, frequent starts, or any other special application considerations. The customer block should include both the name and address of the company, and the name and phone number of a contact who is familiar with details of application and the problem experienced with the unit. See the TITAN product (449 frame and larger) data sheet included in this manual.

Motor repairs can be generally categorized as winding, bearing, or other problems. Each of these categories will require specific data on the warranty repair report as indicated below.

1. The type of winding failure should be specified. These include, but are not limited to, phase-to-phase short, turn-to-turn short, coil-to-coil short, or grounded. Descriptions and/or photographs of the fault area will greatly aid in the collection of data.

2. The location of the fault should be given with as much detail as possible. If the fault is in the end turns, clock position is not particularly useful. More meaningful is the position relative to the terminal coil of a phase. If the fault is in the slot, how much damage was done to the stator iron? What is the condition of the coils from that slot in the end turn? If the fault is at the edge of the slot, what is the condition or position of the cell wall liner? In short, what does the mechanic observe that might have contributed to the winding failure?

3. Is there evidence of abuse such as overloading or single phasing? Are any contaminants such as water or dirt present in the winding?

Bearings

1. Does the bearing appear to have had sufficient lubrication?

2. Are any contaminants such as water or dirt present in the bearing?

3. Are there signs of spinning in the bore or on the shaft? If so, what are the dimensions of the bearing, bore, and shaft journal?

4. What was the customer's complaint about the bearing, and how was it confirmed that the bearing was bad?

5. On vertical motors, is the end play set properly? Does the bearing appear to have excessive thrust?

6. Is there evidence of circulating current (shaft current)?

If there are questions about these or other observations, consult the Product Service Department. Bearing failure analysis and lubricant analysis are available when appropriate.

Other

As complete a summary as is possible should be included in the report. Descriptions of cosmetic defects, missing or broken parts, improper assembly, oil leaks, or machining geometry defects should be detailed.

Vibration problems should include as complete an analysis as is available. The minimum data should be the amplitude of vibration on the application which was deemed to be a problem, the amplitude of vibration of the motor removed and completely isolated from the application, and the amplitude of the vibration in both of these conditions after the corrective action is taken.

Conclusion

The USEM Product Service Department is anxious to assist in providing to our customers the quality product they expect. Complete, accurate, and timely reporting of warranty repairs will significantly aid this effort.

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