Manual / Guide · 1965
200-, 206-, 209- and 211-Type Selectors: Piece-Part Data and Replacement Procedures — AT&T BSP 026-706-801 (1965)
16 pp
Manual / Guide · 1965
16 pp
ADDENDUM 026-706-801 BELL SYSTEM PRACTICES AT&TCo Standard Issue 1, July 1975 200-, 206-, 2C9-, AND 211 -TYPE SELECTORS AND 10-, 26-, AND 32-TYPE BANKS PIECE-PART DATA AND REPLACEMENT PROCEDURES 1. GENERAL or single-piece feeder brushes of the balanced type, 676A feeder brush spacer over the feeder brushes in the same way as shown for the feeder brush in Fig. 12, except be sure that the spacer is placed with the short tooth of the spacer on the index wheel side. Slide the spacer upward to a position such that the top surface of the spacer is about 1/8 inch from the feeder brush tips. Remove the selector mounting screws with the 4-inch E screwdriver. Pull the selector frame forward (away from the bank) until the rotor brush assembly is clear of the feeder brushes. To reassemble the selector and bank, lower the selector into place. Take care in doing this that the rotor brushes engage the bank terminals properly, that the feeder brushes engage the proper rotor brush hubs, and that the dowel on the bank frame is in the hole in the selector frame. A slight sidewise movement of the feeder brush spacer will help proper engagement of the feeder brushes and rotor brush hubs. ^Then insert and partially place a addendum supplements Section 1.001 This 1.002 This addendum is issued to change 3.05. 026-706-801, Issue 2. 8. CHANGES TO SECTION ISSUE 1 CHANGES 2.001 3.05 On Page 6, revise 3.05 to read as follows. Removing Selector From Bank: In replacing some parts of the selector, it may be necessary to remove the selector from the bank in order to obtain access to the parts. To remove the selector from the bank, rotate the selector until the rotor brushes are in the horizontal position. Then on a selector equipped with nonbalanced-type feeder brushes, place a 395A feeder brush spacer over the feeder brushes in the position shown in Fig. 12. If the selector is associated with a bank having two or four feeder brushes, use a feeder brush spacer which has been modified as covered in 3.04. On a selector equipped with either 2-piece tighten the selector mounting screws, and remove the feeder brush spacer. left or right Shift the selector to the as required for optimum alignment bank terminals. of the rotor brushes with the Tighten the selector mounting screws .^ © American Telephone and Telegraph Company, 1975 Printed in U.S.A. Page 1 1 Page SECTION 026-706-801 BELL SYSTEM PRACTICES Issue 8, December, 1965 Plant Series AT&TCo Standard AND 211 -TYPE SELECTORS AND 10-, 26-, AND 32-TYPE BANKS PIECE-PART DATA AND REPLACEMENT PROCEDURES 200-, 206-, 209-, 1. GENERAL tion to other parts of the apparatus. This section covers the information necessary forwdering parts to be used in the maintenance of 200-, 206-, 209-, and 211-type selectors and 10-, 26-, and 32-type banks. It also covers approved procedures for replacing these 1.01 The piece part numbers of the various parts are given, together with the names of the parts as listed by the Western Electric Company Merchandise Department. When these names differ from parts. This section is reissued to revise the piece1 .02 part data and replacement procedures covering detachable feeder brush units and to add piece-part data covering 206CM, 206CN, and 206CP selectors. Detailed reasons for reissue will be found at the end of the section. 1 .03 '—WHEN BACK STOP IS OF DESICN SHOWN HERE USE P-474008 ARMATURE BACK STOP Part 2 of this section covers the piece part numbers and the corresponding names of the parts which it is practicable to replace in P- 168083 ARMATURE BACK STOP (ALL 206- AND 211TYPE AND ALL 200-TYPE SELECTORS EXCEPT THOSE SHOWN AT TOP LEFT) the field in the maintenance of these selectors and banks. No attempt should be made to replace parts not designated. Part 2 also contains explanatory figures showing the different parts. This information is called "Piece-Part Data." p-474008 ARMATURE BACK STOP (209 TYPE AND D- I60S93 SELECTORS) Part 3 of this section covers the approved 1 .04 procedures for the replacement of the parts covered in part 2. This information is called "Replacement Procedures." Fig. Before making replacement of any part of the apparatus covered herein, make the associated circuit busy in the approved manner and block relays operated or nonoperated, as 1 .05 1 - Armature Backstop SELECTOR IS OF DESIGN SHOWN HERE AND A NEW HEX. NUT IS REQUIRED, ORDER P- 154304 NUT AND P- 482450 SCREW. IF 131216 necessary, to isolate the selector circuit. > for replacing detachable feeder brush units on 206BE selectors are covered in 3.22. For other selectors, a similar detachable feeder brush unit was provided as a field replacement for worn bank feeder brush springs. However, detachable feeder brush units have been discontinued for all selectors except the 206BE selector which requires a feeder brush unit for transmission purposes. 2. 2.01 SCREW P- 154005 NUT The 206BE selector is equipped during*"! manufacture with a special detachable feeder brush unit as shown in Fig. 9. Procedures 1.06 P-I5 4304NUT- Fig. 2 — Magnet Parts — Adjusting Bushing and Associated 200-, 206-, and 211 -Type Selectors P-482450 SCREW p-474012 NUT <J PIECE-PART DATA The figures included in this part show the various piece parts in their proper rela- Fig. 3 — Magnet Adjusting Parts — 209-Type © American Telephone and Telegraph Company, 1965 Printed in U.S.A. Bushing and Associated Selectors Page 1 SECTION 026-706-801 RIGID MOUNTING-SEE FIG. 10 5A APPARATUS MOUNTING CUSED ON 1/4" MOUNTING BAR) 5B APPARATUS MOUNTING (USED ON CHANNEL TYPE MOUNTING PLATE)D-81973 APPARATUS MOUNTING (SEE NOTE O- P-284148 WASHER (FOR ALL SELECTORS EXCEPT THOSE EQUIPPED WITH CARD CASE SHOWN IN FIG. 10) P-205652 SCREW WHEN ORDERING PARTS FOR 5A APPARATUS MOUNTING ORDER -P- 125952 NUT -P-283716 LOCK WASHER -P -299497 WASHER P-I540I0 SCREW ROTOR BRUSH ASSEMBLY (SEE 2.04 AND NOTE UNDER FIG -* P-250003 NUT (USED TO SECURE APPARATUS MOUNTING TO MOUNTING BAR) FOR SB APPARATUS MOUNTING SEE NOTE 2 8A> STUD, ARMATURE AND PAWL ASSEMBLY (SEE FIGURES P 5 AND 6) P-I5-A-I20 CONTACT SPRING P-474058 RETAINING PAWL (209 TYPE SELECTORS) ASSEMBLY (206CJ SELECTOR) PAWL (ALL 200,206 AND 211 TYPE SELECTORS) P-I72I86 RETAINING P-154607 CONTACT SPRING ASSEMBLY (200G, 200Y, 206F, 206CG.206CM AND D-178258 SELECTORS) BANKS AND ASSOCIATED PARTS P-154483 CONTACT SPRING ASSEMBLY (200E AND 206D SELECTORS) (SEE 2.05) P-173244 CONTACT SPRING ASSEMBLY (206BU AND 206CP SELECTORS) P-154009 SCREW P-154039 CONTACT SPRING ASSEMBLY (ALL OTHER SELECTORS FROM 200A TO BY INCL. AND 206A TO CN INCL. AND FOR 209A, P-284148 WASHER P-290408 FEEDER SPRING ASSEMBLY (BANK FEEDER BRUSHES) 209B.2IIA, 2IIB,2IIC,D-78I43, D-78677, D- 78683, D-80449, D-81007, D-87398, 0-87399, D-I60S93AND D-I6I367) 164404 SCREW RIGID MOUNTING-SEE FIG. 10 NO. 5B APPARATUS MOUNTING P-154026 STUD (ARMATURE BEARING PIN) (SEE NOTE 3) -P-284148 WASHER *P-250003 NUT (USED TO SECURE APPARATUS MOUNTING TO MOUNTING PLATE) —PARTS OF 5B APPARATUS MOUNTING ARMATURE BACK STOP(SEE FIG. l) ORDER P-205652 SCREW INSTEAD OF THE NUT ON APPARATUS MOUNTINGS NOT STUD MOUNTED 205652 SCREW * ORDER ONE P-206519 SCREW (OR ONE P-205652 SCREW IF THE HOLE THROUGH THE MOUNTING PLATE IS COUNTERBORED) INSTEAD OF THE NUT ON APPARATUS MOUNTINGS NOT STUD MOUNTED- 92619 SCREW NOTES: ORDER 5A OR 5B APPARATUS MOUNTING WHEN ANY PART OF THE D- 81973 APPARATUS MOUNTING REQUIRES REPLACEMENT. PARTS OF 5B APPARATUS MOUNTING USED AT TOP OF SELECTOR, SAME AS PARTS AT BOTTOM OF SELECTOR AS SHOWN IN FIGURE. IN ADDITION TO THESE PARTS A P-30A936 ADAPTER AND P-205 652 SCREW f NOT ILLUSTRATED) ARE USED. WHEN REPLACING A PLATE AND STUD TYPE ARMATURE BEARING PIN ALSO ORDER A NEW PH6440I CLAMP (ARMATURE 3. BFARING PIN CLAMP-FIG.7). IF ONLY SCREW OF PLATE AND STUD TYPE ARMATURE BEARING PIN IS TO BE REPLACED ORDER P-I7246I SCREW I. 2 IF SCREW IS .138-32 THD. OR P-I540I0 SCREW IF .125-40 THD. Fig. 4 - Selector Assembly — 200-, 206-, 209-, and 211 -Type and Associated Bank Page 2 Selector ISS 8, SECTION 026-706-801 ARMATURE AND PAWL (INCLUDES STUD) P- 154608 STUD 200G, 20OY, 206F, 206C6, 206CM AND D- 178258 SELECTORS) P-173243 STUD (206BU AND 206CP SELECTORS) P- 154-021 WIDE NARROW (SEE 3.10) (SEE 3.10) P-290001 P-29O470 STUD CALL OTHER 200.- 206- AND ALL 2II-TYPE SELECTORS) P-250377 P-I746I0 ALL OTHER 200- AND 206-TYPE AND ALL P-290000 P-290469 2II-TYPE P -154013 STOP INDICATOR AND SHAFT SCREW (SEE FIGS. 8A,8B,8C AND 8D) Fig. 5-200- and 206-Type Selector — Armature and Associated Parts INDICATOR AND SHAFT (SEE FIG.8D) ROTOR BRUSH ASSEMBLY P- 154061 NUT (L.H. THD. ON THIS SIDE) -P-I5400I PIVOT P- 474001 STOP (OVERTHROW STOP) P-474010 GUIDE (PAWL GUIDE) INDICATOR P-154002 PIVOT (SEE 2.03) NUT (R.H. THD. ON OTHER SIDE) - — THESE COPPER PLATED PIVOT NUTS ARE USED ONLY ON EARLIER DESIGNS. WHEN A NEW 1 ROTOR BRUSH ASSEMBLY IS BEING ORDERED IN ACCORDANCE WITH 2.04, ALSO ORDER ONE P-290008 PIVOT NUT AND ONE P-290422 PIVOT NUT PER FIG.8B. P-290405 ARMATURE AND PAWL(INCLUDES STUD) Fig. 6 - 209-Type and D- 160593 Selector Armature and Associated Parts Fig. 8A- Indicator and Copper-Plated Pivot Nut — THESE PARTS ARE ADDED TO EARLIER 200-TYPE SELECTORS, P-164404 SCREWS MUST BE SUBSTITUTED FOR THE SHORTER SCREWS ORIGINALLY USED. P-290008 PIVOT NUT(LH. THD. ON THIS SIDE) •IF -P-164402 BRACKET P-290422 PIVOT NUT (R.H. THD. ON OTHER SIDE) (HOLLOW SHAFT) (FRAME STIFFENING BRACKET) P-I5406I INDICATOR- 1 SCREW WITH P-164402 BRACKET ORDER P-154693 SCREW P-164404 (IF SELECTOR IS NOT EQUIPPED Fig. INSTEAD) -P-164403 SCREW 8B- Pivot Nuts INDICATOR AND SHAFT (ORDER P-172401 INDI- CLAMP (ARMATURE BEARING PIN CLAMP) P-I6440I CATOR AND SHAFT ILLUSTRATED IN FIG. 8D. SCREW, PLACE A P- 8589 WASHER (DRIVING SPRING- SEE 2.04) 1 BETWEEN HEAD Fig.7-200-, 206-, 209-, and 211 -Type Selector— Driving Spring, Armature Bearing Pin Clamp, and Associated Parts "I , Solid and Hollow -P- 154198 SCREW CWHEN SCREW IS .125-40 THD.) IF SECURED WITH A J25"-40 THD. SPRING — P-154980 SCREW (WHEN SCREW IS .164-32 THD.) OF SCREW AND INDICATOR) Fig. 8C - Solid-Type Rotor Shaft Page 3 SECTION 026-706-801 those in general use in the field, the latter names, in some cases, are shown in parentheses. P- 21 7497 SCREW THIS SCREW ALSO USED AT BOTTOM OF BANK) When ordering piece parts for replace- 2.02 ment purposes, give both the number and name of the piece part. For example "P-482450 Screw." Do not refer to the BSP number or to any information shown in parentheses or in : P-154008 CARD CASE (200A AND 206 SELECTORS ONLY) notes following the piece part numbers. Information enclosed by parentheses ( ) is not ordering information. This information may be references to notes, parts referred to in other portions of the section and not considered replaceable, or part names in general use in the field if these names differ from those assigned by the manufacturer. 2.03 Fig. 10- Card Case and Bank Mounting Screw for Rigid Mounting The following table lists the numbers and corresponding names of piece parts which are not common to all selectors. 2.04 P- 172.401 INDICATOR AND SHAFT (SEE NOTE) 200- and 206-Type Selectors ROTOR BRUSH ASSEMBLY (See Fig. 4 and 8A) (See Fig. 4) and Fig. 7) P-172830 P-172831 P-l 72832 P-172859 P-172833 P-173212 P-174035 P-l 74035 P-173212 P-173211 P-474009 P-173236 P-173237 P-173237 P-173236 P-172833 P-172830 P-172834 P-172835 P-l 72836 P-173211 P-173213 P-173213 P-174035 P-174035 P-173236 P-474009 P-474009 P-173237 P-173236 P P-172836 P-154798 P-l 72848 R P-l 7.2850 P S P-172837 P-173212 P-173211 P-173212 P-173212 P-173212 P-474009 P-173237 P-474009 P-474009 P-474009 T R U P-173211 P-173212 P-173211 P-173211 P-173212 P-173237 P-474009 P-173236 P-173236 P-474009 SELECTOR P- 154980 SCREW r* NOTE: EARLIER DESIGN OF P-I7240I INDICATOR AND SHAFT WAS FURNISHED WITH A HOLLOW SHAFT. Fig. 8D - Drilled-Type 206 200 TYPE TYPE A B B A C D E F G H D E F G Rotor Shaft H 173107 NUT P- 173108 J K WASHER P- 173106 L — STUD M N -173102 CONTACT SPRING ASSEMBLY J K L M N 1 S AA SATURATED BLACK COTTON SLEEVING -MITCHELL RAND CO, NEW YORK, N.Y. T LONG- ORDER BY THE FOOT.) Y AB AC AE AF AG P-172830 P-172835 P-172835 P-172835 P-l 72840 P-457921 P-174035 P-174035 P-174035 P-174035 P-474009 P-173237 P-173237 P-173236 P-173237 AH AJ AK AM AN P-172841 P-l 72840 P-l 72851 P-l 72852 P-172830 P-174035 P-173211 P-173212 P-174035 P-173212 P-173236 P-173236 P-474009 P-173237 P-474009 P-172853 P-172860 P-173215 P-173215 P-174035 P-173215 P-173212 P-173236 P-173237 P-173237 P-173237 P-474009 W Y NO. 6 (3" U w AA NOTE! LEADS NOT FURNISHED WITH THIS DETACHABLE BRUSH UNIT. FEEDER Feeder Brush Unit and Associated Parts for 206BE Selector Only Page 4 (See Note P-172841 P-172838 P-172833 P-172833 P-l 72839 (DETACHABLE FEEDER BRUSH UNITKSEE NOTE) Fig. 9 - Detachable SPRING COIL AB AC AD AE AF AG AH AJ AK AL AP AR AS AU AW P-l 72854 P-172837 P-l 72842 ISS 8, 200- and 206-Type Selectors Note 1: If the P-474009 spring will not fit in the eye, use the P-173236 spring. ROTOR BRUSH ASSEMBLY SELECTOR SECTION 026-706-801 SPRING TYPE TYPE and 8A) (See Fig. 4) and Fig. 7) Obtain replacement parts for defective banks as follows. AM AN AY P-172843 P-172855 P-172859 P-172856 P-172849 P-173212 P-173215 P-173212 P-173215 P-173215 P-173236 P-173236 P-474009 P-173236 P-173236 (a) Order replacement feeder spring as specified in Fig. 4 and replacement bank clamping screws as covered in 2.06. P-172837 P-172843 P-172855 P-172835 P-172917 P-173215 P-173212 P-173212 P-174035 P-173215 P-173236 P-474009 P-173236 P-173237 P-173236 P-172843 P-l 72844 P-172855 P-172843 P-173133 P-173215 P-457921 P-457921 P-173215 P-173215 P-173236 P-474009 P-474009 P-173236 P-173236 P-173134 P-173135 P-172861 P-l 72862 P-172847 P-173215 P-173215 P-173219 P-173217 P-457921 P-173236 P-173236 P-173237 P-173237 P-474009 P-172833 P-173173 P-172917 P-172843 P-172857 P-173215 P-173215 P-173212 P-457921 P-174035 P-173236 P-173236 P-474009 P-474009 P-173237 P-172855 P-172917 P-172858 P-172853 P-172842 P-173215 P-173215 P-457921 P-457921 # P-l 73213 P-173236 P-173236 P-474009 P-474009 P-173236 P-173606 P-172842 P-283583 P-172833 P-172833 P-174035 P-173213 P-173215 P-174035 P-174035 P-173237 P-474009 P-173236 P-173236 P-173236 P-172840 P-174035 P-457921 P-173212 P-174035 P-173212 P-173236 P-474009 P-474009 P-173236^_ P-474009"H P-173212 P-173212 P-173211 P-173211 P-474009 P-474009 „J P-173237 P-173237 P-173236 206 AP AR AS AT ATJ AW AY BA BB BC 200 BA BB BC BD BE — — — — — — BL — — — — — — — BM D-81007 BD BE BF BG BH Bjy BK BN BP BR BS BT BU BW BY CA CB CC CE CP CG CH CJ CK CL CM CN CP D-78143 D-78677 — (See Hg. 4 COIL (See Note 1 2.05 For all other parts, disassemble a spare bank of the same type having similar bank shall be obtained from a corresponding 26(b) parts, except that parts for a 10-type type bank. Retain unused parts of a disassembled bank for future use. The following table lists the piece part numbers of the clamping screws used with and 32-type banks. 2.06 10-, 26-, — — -= — — — — — — — — — — — — — — — — — — — P-42A032 P-11B573 P-172850 P-172830 P-13B118 P-172917 P-172852 P-172835 CLAMPING SCREW BANK 10A, B, C, E P-154172 P-154490 P-154725 10D 10F, J 26A, B, D, H, J, K 3. P-154172 P-250450 P-250457 26C 26G 26E 26F P-173642 32A, C, D P-154172 32B P-43B177 P-43B177 REPLACEMENT PROCEDURES D-80449 § § D-78683 P-172855 P-172917 P-172847 P-172844 P-174035 P-173229 P-173215 P-173212 P-457921 P-173237 P-173236 P-173236 P-474009 P-474009 P-371562 P-172834 P-172834 P-457921 P-457921 P-457921 P-474009 P-474009 P-474009 209 P-l 74025 P-174030 P-373701 P-173212 P-457921 P-457921 P-474009 P-474009 P-474009 243 3/16- and 5/8-Inch Hex. Closed Double-End Flat Wrench # If the coil of the 206CA selector is replaced, 245 3/8- and 7/16-Inch D-87398 D-87399 D-88325 D-161367 D-178258 § 209 TYPE 209A 209B D-160593 3.01 SPEC NO. DESCRIPTION TOOLS 5/16-Inch Hex. Open-End Offset Wrench 211 TYPE 211A 211B 211C List of Tools, Gauges, and Materials CODE OR the code marking on the selector should be changed to 206CC. § Order by name of part and number of selector on which the part is to be used. Open Double- End Flat Wrench 344 Offset Screwdriver 395A Feeder Brush Spacer Page 5 SECTION 026-706-801 CODE OR DESCRIPTION SPEC NO. TOOLS tion check shall be made of the selector before 395A Feeder Brush Spacers Modified (2 reqd Locally (see 3.04) 1/4- and 3/8-Inch Hex. Open Double-End Flat Wrench 541A 1/4-Inch, 12-Point Double-End Box Wrench 563A 90-Degree Offset Screwdriver 564A 45-Degree Offset Screwdriver 573A 3/4-Inch Single-End Box Wrench 575A Feeder Brush Aligner 676A Feeder Brush Spacer KS-6320 Orange Stick KS-8097 7/16- and 5/8-Inch, 12-Point Offset Box Wrench Soldering Copper Piece of No. 31 Drill Rod Approximately 2 Inches Long Hacksaw 4-Ounce Riveting Hammer 5-Inch Diagonal Pliers P-Long-Nose Pliers (or the replaced long-nose pliers) No. 565 3/32-Inch Pin Punch (or equivalent) L.S. Starrett Co — — restoring the circuit to service. No replacement procedures are specified for screws and other parts where the procedure consists of a simple operation. 3.03 special) 417A by the replacing operations shall be checked to the readjust requirements and an over-all opera- 3-Inch C Screwdriver 4-Inch Feeder Brush Modification of 395A Spacer for Selector Equipped With Nonbalanced-Type Feeder Brushes: Since the standard 395A feeder brush spacer cannot be used satisfactorily on selectors associated with banks having two or four feeder brushes, it will be necessary to modify one of these tools for use with each of these types of selectors. Do this by sawing off the sides of the tools with a hacksaw 3.04 as indicated in Fig. 11. 3.05 Removing Selector From Bank: In replacing some parts of the selector, it may be necessary to remove the selector from the bank in order to obtain access to the parts. To remove the selector from the bank, rotate the selector until the rotor brushes are in the horizontal position. Then on a selector equipped with nonbalanced-type feeder brushes, place a 395A feeder brush spacer over the feeder brushes in the position shown in Fig. 12. If the selector is associated with a bank having two or four feeder brushes, use a feeder brush spacer which has been modified as covered in 3.04. On a selector equipped with either 2-piece or single-piece feeder brushes of the balanced type, place a 676A feeder brush spacer over the feeder brushes in the same way as shown for the feeder brush in Fig. 12, except be sure that the spacer is placed E Screwdriver GAUGE 74D -MODIFIED 395A FEEDER BRUSH SPACER FOR 2 BANK Gauge FEEDER BRUSHES MATERIALS P-173109 Washer 6-Ply Twine 6-32 Nut After making any replacement of parts of a selector, the part or parts replaced shall meet the readjust requirements involved as specified in Section 026-706-701. Other parts whose ^adjustments may have been directly disturbed MODIFIED 395A FEEDER BRUSH SPACER FOR 4 BANK FEEDER BRUSHES 3.02 Page 6 Fig. 1 1 - Illustrating Modified 395A Feeder Brush Spacers for Use With Selectors Equipped with 2- and 4-Bank Feeders ISS 8, SECTION 026-706-801 screws which mount the frame stiffening bracket and contact spring assembly and resolder the wires, taking care that they are connected to the proper terminals. Driving Spring ROTOR BRUSH ASSEMBLY 3.07 BANK FEEDER BRUSHES Remove the driving spring from the driving spring arm with the P-long-nose pliers and disengage the other end of the spring from the driving spring lug. Engage one end of the new driving spring in the eye of the driving spring lug and attach the other end of the spring to the eye or the notch in the driving spring arm. 395A FEEDER BRUSH SPACER Frame Stiffening Bracket and Armature Bearing Pin Clamp Remove the screws which mount the frame stiffening bracket and contact spring assembly with the 3-inch C screwdriver and allow the contact spring assembly to hang by the wires, taking care that the wires do not get broken off. Remove the armature bearing-pin clamp mounting screw with the 3-inch C screwdriver. Substitute the required parts. If these parts are added 3.08 Fig. 12 - Method of Using 395A Feeder Brush Spacer with the short tooth of the spacer on the index wheel side. Slide the spacer upward to a position such that the top surface of the spacer is about 1/8 inch from the feeder brush tips. Remove the selector mounting screws with the 4-inch E screwdriver. Pull the selector frame forward (away from the bank) until the rotor brush assembly is clear of the feeder brushes. To reassemble the selector and bank, lower the selector into place. Take care in doing this that the rotor brushes engage the bank terminals properly, that the feeder brushes engage the proper rotor brush hubs, and that the dowel on the bank frame is in the hole in the selector frame. A slight sidewise movement of the feeder brush spacer will help proper engagement of the feeder brushes and rotor brush hubs. Then insert and tighten the selector mounting screws and remove the feeder brush spacer. to a 200-type selector not previously equipped with them, it may be necessary to bend the con- tact spring assembly terminals toward the front of the selector to avoid the possibility of short circuiting on the bracket. Armature Bearing Pin Initially, the armature bearing pin consisted of a stud to which was riveted a clamping plate. Later, this clamping plate was eliminated and a plain stud adopted which is held in place by a slightly modified armature bearing pin clamp (P-164401 clamp). When replacing a bearing pin with riveted clamping plate, make sure that a new P-164401 clamp is 3.09 also used. Contact Spring Assembly 3.06 To replace a contact spring assembly, un- solder the wires which are connected to terminal lugs and tag them to indicate the terminal to which they should be reconnected. Then remove the screws which mount the frame stiffening bracket and contact spring assembly with the 3-inch C screwdriver. Remove the old contact spring assembly and place the new one in position, holding the assembly so that the interrupter spring is aligned centrally with the driving arm stud. Reassemble and tighten the its To replace a bearing pin, proceed as follows. (1) Remove the driving spring as covered in does not permit removal of a bearing pin without removing the selector from the bank, remove the selector as covered 3.07. If space in 3.05. riveted clamping (2) If a bearing pin with ing plate is being replaced, remove the clampplate mounting screw and pin clamp mounting screw using the 3-inch C screwdriver and discard the pin and pin clamp. If Page 7 SECTION 026-706-801 a plain bearing pin (P-154026 stud) is being replaced, loosen the pin clamp mounting screw using the 3-inch C screwdriver and remove the pin. (3) Mount the new pin, and if necessary mount the new pin clamp. Centrally locate the pin in its bearings and securely tighten the pin clamp mounting screw. insert the 0.007-inch blade of the 74D gauge in the gap between the frame and the rear edge of the armature. If the gauge enters, the wide armature is satisfactory. If the gauge will not enter, remove the assembly and substitute the proper narrow armature (marked X). On 209- type selectors only one width of armature is furnished. Overthrow Stop and Pawl Guide (209-Type Selectors Only) Armature and Pawl Assembly 3.10 Remove the selector from the bank as described in 3.05. Remove the screw and associated washer from the overthrow stop with the 417A wrench. Place the rotor brushes at an angle of approximately 45 degrees above horizontal at the front. Press down on the driving 3.11 Remove the frame stiffening bracket and the armature bearing pin as covered in 3.08 and 3.09. This will permit the armature and pawl assembly to be removed. Two widths of armature and pawl assemblies are available for and 211-type selectors. To determine which armature should be used, proceed as follows. Place the proper wide armature and pawl assembly in position and insert the bearing pin. Operate the armature manually. Then attempt to 200-, 206-, pawl and remove the pawl guide and overthrow stop. Mount the new pawl guide and overthrow stop on the selector frame, placing the parts in position in the reverse order of removal. Remount the selector on the bank as described in 3.05. BANK RETAINING PAWL SELECTOR MOUNTING SCREW RETAINING PAWL MOUNTING SCREW ROTOR BRUSH ASSEMBLY ARMATURE AND PAWL DRIVING ARM 5TUD NDICATOR AND SHAFT INTERRUPTER SPRING (PART OF CONTACT SPRING ASSEMBLY) INDICATOR CLAMPING SCREW BANK FEEDER BRUSHES MAGNET ADJUSTING BUSHING MAGNET ADJUSTING LOCK NUT MAGNET CLAMPING SCREW FRAME STIFFENING BRACKET- MAGNET COIL CONTACT SPRING ASSEMBLY DRIVING SPRING ARMATURE BEARING PIN CLAMP DRIVING SPRING LUG DRIVING SPRING ARM ARMATURE BEARING PIN CLAMP MOUNTING SCREW ARMATURE BEARING PIN- Fig. Page 8 13 - Designation of Parts ISS If necessary, remove the selector from the INDICATOR WHEEL PART OF ROTOR BRUSH ASSEMBLY) bank as covered in 3.05. Remove the indicator clamping screw with the 417A wrench or the 243 wrench, depending on whether a 1/4-inch or 3/16-inch hexagonal head screw is used. If the shaft can be removed without removing the selector from the bank, use a piece of No. 31 drill rod to push the shaft out. As the ( INDICATOR CLAMPING SCREW shaft is pushed out, the piece of drill rod will assume the position previously occupied by the shaft and will hold the rotor brush assembly in place until the new shaft can be inserted. If the INDICATOR AND SHAFT shaft cannot be removed with the fingers, use the 3/32-inch pin punch and 4-ounce riveting hammer to loosen the shaft. When replacing the shaft, it SECTION 026-706-801 INDICATOR AND SHAFT Indicator and Shaft 3.12 8, Fig. 14 - Indicators and Shafts INDICATOR may be necessary to tap the shaft in PIVOT NUT the hole because of a tight fit. To do this, place the frame on its side with the indicator wheel up and with the hole in the rotor assembly in INDICATOR line with the associated holes in the frame. Place the end of the shaft over the associated hole in the frame with the hole in the indicator lined up with the threaded hole in the frame. Then place a piece of fiber or wood over the indicator and tap lightly with the 4-ounce hammer until the shaft is forced into position. If the shaft will not go into the hole when tapped lightly, select a shaft of a size that will go into the hole when tapped lightly. Reassemble the selector on the bank. Rotor Brush Assembly Selectors Equipped With Indicator and On selectors equipped Shaft: Fig. 14 with the types of indicators and shafts shown in Fig. 14, if space permits the removal of the indicator and shaft without removing the selector from its bank, first remove the retaining pawl mounting screw with the 3-inch C screwdriver and remove the retaining pawl. If the shaft cannot be removed without removing the 3.13 — selector from the bank, it will not be necessary CLAMPING SCREW INDICATOR WHEEL OF ROTOR ( PART BRUSH assembly; Fig. 3.14 15 — Indicator and Pivot Nut Selectors Equipped With Pivot Nuts: Fig. 15 Remove the retaining pawl mounting — screw with the 3-inch C screwdriver and remove the retaining pawl. If the shaft cannot be removed without removing the selector from the bank, it will not be necessary to remove the retaining pawl, but in this case the rotor brush assembly must be removed from the rear of the selector frame. Remove the pivot nuts on both sides of the selector frame with the 417A wrench and the indicator clamping screw with the 243 wrench. Then remove the rotor brush assembly. Replace the defective rotor brush assembly as cpvered in 3.16. When replacing a rotor brush assembly with which copper-plated pivot screws were used, replace these screws with screws as 3.15 covered in Fig. 8B. to remove the retaining pawl, but in this case the rotor brush assembly must be removed from the rear of the selector frame. Remove the indicator and shaft as covered in 3.12, after which the 3.16 Reassembling Rotor Brush Assembly in Selector: On selectors where the shaft and rotor brush assembly can be removed. Replace indicator are an assembly, hold the rotor brush assembly in place in the frame and then insert the defective rotor brush assembly and reassem- the ble the parts as covered in 3.16. where the short bearing pin type pivot nut is shaft as described in 3.12. On selectors Page 9 SECTION 026-706-801 used, hold the rotor brush assembly in place in the frame, insert the pivot nuts into the frame, move the driving arm stud by cutting it with and tighten them securely. On selectors where the 5-inch diagonal pliers. the hollow shaft type pivot nut is used, hold the rotor brush assembly in place in the frame, insert the pivot nuts into the frame, and tighten them securely. Then check for binding of the rotor brush assembly as follows. Remove the selector from the bank, if this has not been done. Hold the driving pawl and the retaining pawl (if the latter has not been removed) away from the ratchet wheel and spin the rotor brush assembly by hand. If the rotor brush assembly does not spin freely, the trouble is due to misalignment of the shaft and the rotor brush assembly. To correct, slightly bend the hollow shaft. Do this by removing the pivot nut on the index wheel side and applying pressure on the rotor assembly until the hole in the rotor assembly is concentric with the hole in the frame from which the pivot nut was removed. Reinsert the pivot nut and recheck for binding. If the rotor taking care that the wires do not break off. Re- Before placing a new stud on the projecting lug of the driving arm, heat the stud becomes pliant by placing it near a hot soldering copper. Then place it on the projecting lug of the driving arm and press against it until it assumes its correct position against the shoulder on the driving arm. 3.20 until 3.21 it Remount the contact spring assembly as covered in 3.06. Detachable Feeder Brush Unit — 206BE Selector Only (see 1 .06) 3.22 To replace the detachable feeder brush unit, proceed as follows. (1) Remove the fuse which supplies current to the circuit associated with the selector magnet. Cover the apparatus below the bank being worked on to protect it against falling does not spin freely, it will be necessary to bend the shaft a little further. Do this by again removing the pivot nut and applying pressure on the rotor. Reinsert the pivot nut and again check for binding. Repeat these operations, if necessary, until the rotor does not bind. Reassemble the selector on the bank as covered in 3.05 and mount the retaining pawl, if it was removed. still solder or screws. (2) Unsolder the wires connected to the terminals of the detachable feeder brush unit. Tag the wires to indicate the terminals on the new feeder brush unit to which the wires are to be connected. Remove the mounting nut holding the old feeder brush unit with the Magnet Coil 417A wrench and remove the unit. Mount the Unsolder the wires from the terminals and remove the magnet clamping screw with the 344 screwdriver or 541A wrench, as required. Remove the armature and pawl assembly as covered in 3.10 and remove the coil. Substitute the new coil and tighten the clamping screw. Reassemble the parts of the selector. replacement unit as follows. 3.17 (3) Place the 395 A tool on the springs of the detachable feeder brush unit to hold the paired spring tips together. Rotate the rotor brush assembly of the selector so that the front brushes are approximately 45 degrees below the horizontal. Mount the feeder brush unit on the mounting stud and at the same time guide the tips of each pair of springs between the hubs of the associated pairs of rotor brushes. After this operation, assemble the clamping washer and clamping nut and securely tighten the nut with the 417A wrench, at the same time holding the feeder brush unit to prevent it from turning. Magnet Adjusting Locknut and Bushing To replace either of these parts, remove the magnet clamping screw with the 344 screwdriver or 541A wrench, as required. Loosen the magnet adjusting locknut with the 243 or 573A wrench, as required, and remove the magnet adjusting bushing with the KS-8097 wrench. Reassemble the parts, making the necessary replacements. 3.18 (4) 3.19 To replace a driving arm stud, remove the contact spring assembly as covered in 3.06 and allow the assembly to hang by the wires, Page 10 Solder the wires to the proper terminals. Check the requirements as covered in 3.23. Driving Arm Stud 3.23 Check the requirements as covered in Section 026-706-701 and adjust as required. If it is found that there is insufficient clearance ISS 8, between the ends of the feeder brushes and the spacing washers or that the entire contacting surfaces of the prongs do not contact with the rotor, loosen the mounting nut and attempt to correct this condition by shifting the feeder brush unit on the stud making use of the play in the mounting hole in the unit. If this does not correct the trouble, remove the feeder brush unit from the mounting stud and place a P-173109 washer in back of the feeder brush unit. Replace the nut and securely tighten it, making sure that the interdependent requirements are met. If one P-173109 washer does not bring about the desired results, add another washer, following the procedure described above. Bank Feeder Brush Replacement 3.24 To replace worn bank feeder brushes, proceed as covered in 3.25, 3.26, or 3.27. Selector Not Equipped With Detachable Feeder Brushes: To replace bank feeder brushes on a selector not equipped with detach- 3.25 able feeder brushes, proceed as follows. (1) Remove the fuse which supplies current to the circuit associated with the selector magnet. Cover the apparatus below the bank being worked upon to protect it against falling solder or screws. (2) the selector from the bank as covered in 3.05. If necessary, tie the se- Remove lector to the framework by means of a piece of twine to avoid damaging the wiring to the selector. (5) SECTION 026-706-801 Where a feeder brush is to be replaced on a bank equipped with the earlier-type 2-piece feeder brushes or single-piece unidirectional-type feeder brushes, it will be necessary to replace all of the feeder brushes on the bank as covered in (7), as only single-piece feeder brushes of the balanced type are fur- nished as replacement parts. (6) Starting with a feeder brush to be replaced, or if all brushes are to be replaced starting with the No. 1 feeder-brush, loosen the adhesive holding the feeder brush in position by means of the heat from a soldering copper held against the soldering terminal of the feeder brush. Take care not to touch the adjacent bank terminals with the soldering copper. While applying the soldering copper, gently push the feeder brush toward the front of the bank by applying pressure with the KS-6320 orange stick near the prongs of the feeder brush. When the feeder brush is loose and while still hot, grasp the feeder brush near its base at the bank insulator with the P-long-nose pliers and gently pull forward and out toward the front of the frame. Make sure that the brush is loose before pulling to avoid damaging the varnished muslin insulators between which the feeder brush is set. If any metallic particles have accumulated near the base of the bank terminal adjacent to the feeder brush, remove them to avoid a possible short circuit between the terminal and the feeder brush. Then unsolder the wires connected to the feeder brush and tag the wires for identification if necessary. Remove the feeder brush spacer men- tioned in 3.05. (7) Insert the soldering terminal end of the new feeder brush into the bank from the (3) Remove the bank mounting screws with the 4-inch E screwdriver and draw the bank to the front or rear of the frame, depending upon which is more convenient, taking care not to damage the bank wiring. With the 4-inch E screwdriver or the 563A and 564A offset screwdriver, loosen the bank clamping screws sufficiently to remove the bank frame to make the bank feeder brushes accessible. The topmost bank clamping screw and a 6-32 nut may be used to keep the remainder of the bank assembly together. Exercise care that the bank frame is not bent or damaged. (4) inside in the space between the varnished muslin insulators left vacant by the removed feeder brush. Take care that the semicircular notch in the edge of each new feeder brush is toward the bank terminals and that the brush is being inserted between the varnished muslin insulators. Press the feeder brush through the bank until the soldering terminal protrudes slightly. At the same time guide the brush so that it will slide between the var- nished muslin insulators in the groove previously occupied by the brush that was removed. Take care to avoid damaging the varnished muslin insulators. Page 1 SECTION 026-706-801 (8) Reassemble the bank. Before tightening the clamping screws, press the prong ends of the feeder brushes outward (towards the front) without forcing. With all brushes moved upward as far as the tinned part of the soldering terminal, place the 575A feeder brush aligner on the bank so that the wedgeshaped block of the tool enters between the prongs on the feeder brushes. Move the tool toward the bank, taking care that the frame of the bank goes between the lugs on the side of the tool. Force the tool down slowly until the locating pin on the bank enters the slot in the frame of the tool. Press the tool flat against the bank. With a bank mounting screw, securely fasten the 575A tool to the bank frame, using the lower clearance hole in the tool as illustrated in Fig. 16. (9) Make sure that each individual feeder brush bears tightly against the wedgeshaped block of the tool and rests against the round block of the tool. These conditions will generally be met automatically, though in some cases it may be necessary to shift individual brushes slightly by pushing them up from underneath the bank. (10) When the feeder brushes are properly positioned and with the feeder brush aligner still held on the bank frame, start all the bank clamping screws a few turns into their respective tapped holes. Then securely tighten them, starting at the bottom screw and then working back from top to bottom. Make sure that each feeder brush remains in position as covered in (9). Remove the 575A tool and note that the feeder brushes and bank contacts are properly aligned and have not shifted during the tightening of the bank clamping screws. If parts are not properly aligned, loosen the bank clamping screws and reposition the bank parts to meet the conditions covered in (9). (11) rpar— BANK When properly aligned, solder the wires to the soldering terminals. Remount the BANK CLAMPING SCREW bank on the frame and reassemble the selector on the bank. Then make sure that the selector meets the requirements specified in Section 026-706-701. SOLDERING TERMINAL 3.26 BANK TERMINAL Selector Equipped With Detachable Feeder Brushes Except 206BE Selectors: To replace bank feeder brushes on a selector WEDGE BLOCK FEEDER BRUSH equipped with detachable feeder brushes other than a 206BE selector, proceed as follows. (1) Remove the fuse as covered in 3.25(1). Then remove the detachable feeder br