Sales Terms & Conditions


The remanufactured equipment sold by TDI Group, LLC is guaranteed for a period of twelve months from the date of shipment to operate under normal load, usage conditions and competent supervision. Any mechanical or electrical parts proving defective under such normal operation will be repaired or replaced (at our option) by TDI, F.O.B. our plant. We are not responsible for consequential losses or damages outside of this equipment, nor for repair or replacements made by others without our written authorization. Corrections of defects by repairing or replacing by us shall constitute fulfillment of all our obligations to the purchaser.
1.      All components are completely disassembled and match marked.
2.      Frames are sandblasted and repaired.
3.      All worn bushings or pins are replaced.
4.      Coils are electrically tested, correct horsepower rating is checked.
5.      Brake shoes are relined with non-asbestos lining.
6.      Final inspection is made.
1.      All motors are match marked and disassembled.
2.      All mechanical parts are sandblasted to remove paint and other contaminates.
3.      All electrical parts are steam cleaned and baked dry in gas-fired ovens.
4.      Insulation and meggar tests are taken and recorded.
5.      If rings apply: turn rings on rotor.
6.      All electrical parts are heated and then dipped in Class H varnish. The parts are baked dry at approximately 250 degrees.
7.      The motor frame is cleaned, primered, and painted on the outside with Rustoleum navy-gray paint. The inside is painted with epoxy-type insulating compound. A preservative is also added to the shaft extension.
8.      The machine is assembled on the test floor.
9.      New Bearings are installed.
10. If brushes apply: new brushes are installed.
11. The air gap around the periphery of the rotor is checked for uniformity.
12. Each machine is operated throughout its speed range. Each is dynamically balanced, and the data is recorded. These tests are implemented with electronic balancing equipment.
13. Test data including final meggar readings, circuit, stator resistance, surge test windings, hipot windings and    balance, etc., are recorded.
1.      Motor is to be match marked and disassembled.
2.      All mechanical parts are to be sandblasted or (approved equal) to remove paint and other contaminants.
3.      All electrical parts are to be steam cleaned and baked dry in gas-fired oven.
4.      The following non-destructive tests are to be taken and recorded.
            Armature                                  Field Frames
            Ductor                                      AC/DC Drop Test
            Bar to Bar                                Surge Test
            Surge                                       Meggar
            Meggar                                    P.I.
5.      Armature slot wedges are to be checked for condition and tightness and are to be replaced as required.
6.      The headers on the main poles and interpoles are to be checked and replaced or repaired as required.
7.      The field frame wiring will be replaced.
8.      The brush holders and the brush arm springs will be cleaned, repaired, or replaced as required.
9.      Provide and install new brushes.
10. The armature will be glass banded (old bands removed).
11. All electrical parts will be heated and dipped in a Class H varnish. The parts are to be baked at approximately 250 Deg. F for 24 hours to dry and cure the varnish.
12. The armature is to be placed in a lathe, and the commutator is to be turned and undercut and dynamically balanced.
13. The bearing journals are to be polished or ground. A micrometer measurement is to be made to determine  the exact size of the journals to compare with the bearings. Data is to be recorded.
14. The bearing(s), pedestals, covers, end bells, and miscellaneous parts are to be cleaned, primered, and painted.
15. The bearings are checked and the bores are also measured with a micrometer. Clearances based upon the  shaft diameters must meet industry standards; otherwise the bearings are rebabbitted.
16. The field coils, stators, and armatures are to be painted with a varnisype, oil-resistant, air-drying insulating compound. Machine surfaces are to be coated with a suitable rust inhibitor. The field frames are to be painted.
17. The machine is assembled on the test floor.
18. The air gap around the periphery of the armature is checked for uniformity.
19. The neutral position for the brushes is determined. The brush arm spacing is checked and the brushes are     placed in the neutral positions. The brushes are properly seated by sanding and checking the spring tension.
20. Each machine is operated throughout its speed range. Each is dynamically balanced and the data is  recorded. These tests are implemented with electronic balance equipment. The bearing rings are checked for proper movement.
21. Test data, including the final meggar readings, field resistance, field current, dynamic balance readings, bearing temperature rise, motor speeds, etc., are recorded for future reference.