TTB-9-2920-225-34-1 Regulator Check Out and Repair 100 Amp 2920-00-900-7993 Download
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TB 9-2920-225-34-1 CHAPTER 1 INTRODUCTION Section I. 1-1. Scope. These procedures are applicable to Direct Support and General Support levels. The instructions are limited to the model described, but may also aid in repairing other 100 AMP regulator (Solid State) models which may be in use. Repair beyond that covered is permissible if time and skills are available. 1-2. Purpose. This bulletin describes the checkout and repair procedures for the 100 AMP regulator (Solid State), NSN 2920-00-900-7993. 1-3. General. a. The 100 AMP (Solid State) regu- lator, NSN 2920–00–900–7993, procured under a military standard performance-type specification. As such, the design and detail drawings are pro- prietary to each of the manufacturers and are not available. At present, there are three suppliers of the regulators: (1) Leece-Neville. Code Ident 35510 (FSCM) Sheller-Glove Corp. Leece-Neville Cleveland Div. 1374 E. 51 St. Cleveland, OH 44103 Telephone AC 216 431–0740 (2) DC Electronics. Successors in 1978 to Vap-Air Code Ident 34904 (FSCM) DC Electronics Inc. 544 N. Highland Ave. Aurora, IL 60506 Telephone AC 312844-5170 (3) Leland Electrosystems Inc. Code Ident 07639 (FSCM) Leland Electrosystems Inc. 740 E. National Road P.O. Box 128 Vandalia, OH 45377 Telephone AC 513898-5881 b. The 100 AMP regulator was originally desig- nated as non-repairable. However, since fielding, the regulator has consistently appeared as a back order item. This bulletin is provided as an interim GENERAL solution to this problem, until maintenance and provisioning studies are finalized, at which time pertinent information may be incorporated in TM 9–2920-225-34 and TM 9–2920–225-34P. The 100 AMP regulator is illustrated in figure l–l. c. This bulletin contains instructions for the repair of nine different models which are described in the chapters listed below: Chapter 2 Vap-Air (four models) Chapter 3 Leece-Neville (four models) Chapter 4 Leland Airborne (one model) For simplicity, the regulator model numbers are abbreviated with a portion of the last digits e.g., Vap-Air model 26440002–05 is abbreviated as model 05, Leece-Neville model R0015027RA is ab- breviated as model 5027RA. d. A 100 AMP regulator checker is described in chapter 5. In addition, TB 9–2300-409-30, (Gen- erator System Tester (Go/No-Go), provides fabri- cation instructions for a regulator test stand. e. Replacement parts which are not identical with the original parts may cause a change in per- formance of the regulator. The repair facility should remain aware of this possible performance change and use substitute parts with reasonable caution. Replacement parts should be obtained with the following priorities: (1) Where parts are available in the supply system, the stock number is provided. (2) Where no stock number is available, the part should be either obtained from a non-repair- able regulator (cannibalization) or ordered from the manufacturer. (3) Appendix A lists all National Stock Num- bers (NSNS) in ascending National Item Iden- tification Number (NIIN) sequence for quick referral to the Federal Supply Code for Manufac- turer ( FSCM). Addresses for FSCMS are listed in SB 708-41/42. (4) When all else fails, try a substitute part and monitor the performance of the repaired regulator. 1-1