Bogie Mounted Air Brake System PDF

Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System CHAPTER 6 BOGIE MOUNTED AIR BRAKE SYSTEM 601 GENERAL bore pneumatic pipeline has be...

Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System CHAPTER 6 BOGIE MOUNTED AIR BRAKE SYSTEM 601 GENERAL bore pneumatic pipeline has been laid over bogie frame to inter In order to overcome the problems of connect the brake cylinders of one slack adjuster failure as well as problems bogie. Output pipe line of distributor associated with cast iron brake blocks, a valve has been connected to bogie design of brake system incorporating 8" pneumatic line through flexible size two cylinders on each bogie along hoses to provide flexibility to with ‘K’ type high friction composite alround dynamic movement. brake blocks has been introduced. 603 COMPOSITE BRAKE BLOCK 602 DESIGN FEATURES OF THE 603a General SYSTEM (refer figure 6.1) Low friction composite brake blocks This type of system is exactly similar to have the following benefits: the standard air brake system except for n Reduced braking distance due to the following: uniform co-efficient of friction. n Reduced weight a) External slack adjuster is removed/ n Reduction in the replacement of eliminated brake blocks vis a vis cast iron due to b) Four cylinder of 8" size is provided higher wear life in train operation. for each coach in place of two n Reduced wear and tear of brake cylinders of 14" in standard air rigging. brake system. These cylinders have n Reduced noise during braking. built in single acting slack adjuster for taking the slack created between 603b Characteristics of composition brake wheel and brake block on account of blocks wheel / brake block wear. Mounting i. Composition of material of cylinders is done on either side of the bogie frame in between central The composition of material longitudinal members connecting the constituting the brake blocks must be bogie transom to the headstocks. chosen to give the best balance Each cylinder controls the braking between : on one wheel set. Each cylinder has a piston take up stroke of 32 mm and § The braking characteristics adjustment capacity of 305 mm § The wear and service life of blocks (Ref. Drg. RDSO Sk- 81057) § Wear on the running surface of the wheels c) High friction composite brake blocks § The effect on adhesion between the of ‘K’ type have been used. rail and wheel d) Bogie brake rigging has been modified to incorporate a total ii. Requirement concerning friction mechanical advantage of 7.644 per § The average coefficient of friction is bogie for non-AC coaches and 8.40 0.25. per bogie for AC coaches. § As far as possible the coefficient of e) Curved profile pull rods have been friction must be independent of the used to interconnect levers initial braking speed, the state of controlling braking one wheel set. bedding-in of the brake block, the These pull rods provided with one specific pressure also the additional hole for the adjustment of temperature and atmospheric slack between wheel and block after conditions. specified amount of wear. f) Since brake cylinders have been mounted on the bogie frame, 15mm. Chapter 6, Page 1 of 14  Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System M aintena nce M anua l for BG ICF C oaches C hapter 6, Page 2 of 14 +0 685 -10 305 MAX. SLACK TAKE UP. 679 ADJUSTER IS TO BE RESET BY %%p0.5 4-FIXING REWINDING THE ADJUSTING TUBE. 95 MAX. HOLES %%C21 1 27 STROKE 95 MAX. (MUST BE IN A STRAIGHT STROKE WORKING STROKE,32mm FOR SELF LINE) * % % p 0.5 GENERATING MAIN LINE COACHES, 117.5 281 22 A 60mm FOR BG EMU COACHES. * 127 130 = = %%p0.5 204 12 7 LEVERS MUST BE ARRANGED SUCH THAT POSITION A FOR MAIN LINE SELF R EL EA SE PO SITION AF TE R THE CROSSHEAD IS 25 HAND BRAKE TRUNNION F ULL 305 TAK E- UP GENERATING AND BG EMU TRAILOR HELD WITH IN 1.5mm COACHES OF THIS AXIS. PO SITIO N IN ITIA L R E LE ASE 2 Nos.AIR INLET PIPE CONNECTION, ONE CONNECTION IS TO BE MADE DUMMY BY PLUGGING. 400 MOVEMENT TO BE ALLOWED FOR 365 B MAX. WORKING MOVEMENT % % p0. 5 = M A X. 31 204 MA X. 47.. = M A X. 47 M AX. 31 RESETTING LATCH B og ie M ounted Air Brake System LEVERS MUST BE ARRANGED SO THAT THE PATH OF THE POSITION B FOR EMU MOTOR COACHES CROSSHEAD CENTRE LIES BETWEEN THESE LINES. %%UNOTE:- 1. TO MANUFACTURE BOGIE MOUNTED BRAKE CYLINDER FOR MAIN LINE COACHES, REFER RDSO SK-81200 AND THE BILL OF MATERIAL FOR DIFFERENT COMPONENTS. FIGURE 6.1 SUPERSEDED BY: INDIAN RAILWAY STANDARDS SK-81200 5 - CD/8/2K DRAWING REVISED 11/2K 1. DIMENSION 101.6mm CHANGED TO 102. ASSEMBLY DRAWINGS SUPERSEDES: EMU STOCK & SELF GENERATING 4 - CD/4/2K 2. DIM. 117.47mm CHANGED TO 117.5. %%p0.5 4/2K REFERENCE:- SCALE P MAIN LINE COACHES 3. FIXING HOLE DIA. CHANGED TO 21mm. C 203.2 mm x 95.25 mm (8"X 3 3/4") 3 - CD/21/99 NOTE 2 ADDED. 12/99 D SK.SRIVASTAVA BRAKE CYLINDER WITH - TOLERANCE +0/-10mm ADDED T 2 CD/7/99 2/99 ON DIMENSION 685. J.S. SLACK ADJUSTER 1 - CD/35/98 NOTE 1 ADDED & TITLE CHANGED 12/88 FLOPPY No. :- R. D. S. O. GROUP 1 2 ALT. ITEM AUTHY. DESCRIPTION DATE B.G. (C) 3 4 5 SKETCH-81057 Chapter 6, Page 2 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System § Under the effect of dampness, the § The use of asbestos is prohibited. average coefficient of friction must not § The use of lead or zinc in the metal vary, with the other condition state or in the form of compounds is remaining the same, by more than not advised. The same applies to all ±15% in relation to the value obtained other compounds, if in the form of during braking when dry. powder, particles or gas produced § After prolonged braking followed by during the used of the brake blocks, braking to a stop, particularly high they may constitute a danger to health. temperature occur. Even in the case of 603d Asbestos based ‘K’ type composition these temperatures (maximum 400 0C brake on the opposing friction surface) the average coefficient of friction must not § Asbestos based ‘K’ type blocks shall vary with the other conditions generally conform to RDSO drawing remaining the same – by more than No. 98146. ±15% in relation to the value obtained during braking in cold and dry state. 603e Marking iii. Geometrical characteristics of the Each block must bear the following brake blocks marks:- § The constructional features of the brake blocks must enable them to wear § Name of manufacturer down to a thickness of 12 mm § Date of manufacturer (month and including the back plate, without the year) latter coming into contact with the § Material code including ‘KA’ for running surface of the wheel. asbestos type and ‘KNA’ for non- iv. Mechanical and physical asbestos type. characteristics § Type of service ML. § The various elements making up the These marks, preferably punched, cut or brake blocks must be spread uniformly stamped, must be applied so that the block in the body of the block. There must can be identified, even after being fully be no pitting, flaws or other defects. worn in service. The material must not attack the opposing friction surface or give rise 603f Comparison of properties/Usage of to the formation of metal inclusions. composition brake block Vs Cast Iron Composition brake blocks must Brake block not bring about more serious heat damage to the wheels (hot spots, Param- Type of Brake blocks in use on main line cracks, flaking) than would be caused eters coaches by cast iron blocks used in the same 'L' type CBB 'K' type CI way on the same wheels. CBB § The values of specific weight, thermal conductivity, hardness, bending Appli- All coaches All coaches All strength and the modulus of elasticity cability with with bogie coaches must be given for acceptance underframe mounted with purposes. mounted air brake vacuum § No method is laid down for fixing the brake system system brake and composite material part to the back under plate. The back plate must be designed frame to support the stresses likely to occur. mounted § The composition blocks must not brake affect to an unacceptable degree the system adhesion values between wheel and Speed Upto 110 upto 110 Upto 140 rail obtained on vehicles braked with KMPH KMPH KMPH cast iron inserts. Coeffic 0.12 to 0.14 0.25 max. 0.12 to ient of 0.14 603c Non-asbestos ‘K’ type composition friction brake block Weight Approx. 3 Approx. 3 Approx. 9 § Non-asbestos ‘K’ type blocks shall kg. kg kg. generally conform to RDSO drawing No. 98066. Chapter 6, Page 3 of 14  Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System 604 WORKING PRINCIPLE cylinder pressure developed is 3.8 +/ - 0.1 kg/cm2 as in the case of standard air There is no change in the overall brake brake. system in bogie-mounted arrangement up to the action of distributor valve. Here the 604b Release system will respond to action on A-9 For release of the brakes, driver moves valve in similar fashion as in the case of handle of A-9 valve to release position. standard air brake system. Working of By this movement, the brake pipe is bogie mounted brake system beyond charged to the required pressure of 5 distributor valve is explained below. kg/cm2. This actuates the distributor valve and brake cylinder is cut off from the 604a Application (see fig. 6.2 ) auxiliary reservoir. The air from brake cylinder is exhausted to atmosphere and brakes are released. For application of brakes, driver moves the handle of A-9 valve in the application 604c Slack up Action position. By this movement the brake pipe Cylinders of bogie mounted brake system pressure is reduced which is sensed by are provided with automatic slack take up distributor valve to operate brake cylinder features. As soon as the piston stroke (1). Pneumatic pressure in the brake exceeds a pre determined value (on cylinder causes piston assembly (2) to account of either brake block or wheel or move outward thereby causing lever (3) to both) a ratchet with adjusting screw fitted rotate about its fulcrum (a) thus bringing inside the cylinder turns thereby brake block (4) to come in contact with increasing the length of the piston rod the wheel (5) through the brake beam (6). automatically. During return stroke, the Since lever (3) is hung on the bogie frame adjusting movement takes place. A red through lever hangers, it will start moving paint mark on the adjusting tube assembly forward about fulcrum (b) after brake indicates that piston unit has extended block (4) has contacted wheel (5). This over its full range and requires resetting of forward motion of the lever (3) about pull rod (7). fulcrum (b) will cause pull rod (7) to move forward thereby causing lever (8) to 605 COMPARISION OF IMPORTANT swing about fulcrum (c) and hence PARAMETERS resulting in contact of brake block (9) against wheel (5) through brake beam In the underframe mounted brake gear (10). arrangement, it is seen that there are 51 pin joints per bogie in the system. To Extent of brake cylinder pressure reduce the number of pin joints, levers, developed in the brake cylinder will pull rods and push rods, bogie mounted depend upon the extent of reduction in brake system for mainline coaches have brake pipe pressure. Maximum brake become a viable alternative. Comparison INLET PLUG compressed air is supplied from loco 2 1 3 C 4 8 7 10 6 9 b 5 SCHEMATIC BOGIE BRAKE GEAR ARRANGEMENT FOR BOGIE MOUNTEDFIGURE 6.2 BRAKE SYSTEM Chapter 6, Page 4 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System of bogie brake system with conventional WTAC4-3-2-402 which is designed air brake system for various parameters is for 16T bogies. as follows:- iv) While fitting curved profile/pull rods Table 6.1 as per Para (iii) above, it shall be ensured that they are fitted as shown Item Convent- Bogie in the bogie brake arrangement ional Air Mounted drawings and not reversed under any Brake Brake circumstances. System System v) Curved profile/pull rods as per Para Weight reduction - 492 kg. (iii) have been provided with a single (as compared to hole at one end and two holes at conventional air other end, for initial fitment, when brake system) wheel as well as brake blocks are Braking distance 905 m 800 m new, connection of levers through at 110 kmph pull rod will have to be made using (18 coaches) extreme holes/strictly. When wheel No. of pins and 102 84 diameter reduces to 839 mm. and 38 bushes packing is provided at axle box to Brake block wear 3 cc/kwh 1.325 compensate for the wheel wear, rate cc/kwh connection of pull rod must be shifted to adjacent hole. 606 MAINTENANCE INSTRUCTIONS vi) Under new condition of wheel (dia. 915 mm) and brake block, As explained above, bogie mounted brake gap between brake block and system from maintenance point of view is wheel (with brake block in released exactly same as the standard air brake condition) be maintained at about 5 system except for brake cylinder, which mm. This will ensure that piston are different than the existing system. stroke (without utilizing the slack Therefore, to maintain the system, take up capacity) of brake cylinder instructions contained in the Air Brake remained within the value of 32 System (chapter 4) will have to be mm. followed in addition to those which are vii) Design of brake rigging has been indicated in the maintenance manual for done in such a way that up to brake cylinders supplied by wheel diameter of 839 mm. and manufacturers. brake block in full worn condition, 607 SPECIAL PRECAUTIONS TO BE red paint mark on the adjusting TAKEN DURING MAINTENANCE tube sub assembly will not appear (indicating condition that piston The maintenance of underframe unit has extended fully and equipments and fittings should be done as requires resetting). However, if due per underframe mounted air brake system. to some reasons, this mark appears, Following special precautions must be worn brake blocks must be taken to ensure proper working of the replaced by new ones. Failures to bogie mounted brake system. observe this condition will result in increased gap between wheel and i) It shall be ensured that only high brake blocks. Procedure for friction composition brake blocks resetting is explained in the ‘K’ type are used with this maintenance manual of brake arrangement. cylinder supplied by the ii) It shall be ensured that levers of non- manufacturers. AC coaches (13T bogies) are not viii) Once the brake block has worn to mixed with those on AC coaches condemning limit (shown by the (16T bogies) under any mark on the block) it must be circumstances. replaced by a new one. iii) It is very important to ensure that curved profile pull rods (item ‘6’ of ix) The rocker from position of Brake ICF Drg. No. T-3-2-802 which is Cylinder should be kept in meant to be used for 13T bogies is horizontal axis of cylinder before not intermixed or replaced with pull fitment. rod (item 4) of ICF Drg. No. Chapter 6, Page 5 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System x) Adequate size of pins and bushes 608f Dismantling as indicated in the drawing of the system must be used in the rigging i) Unscrew cross head and to get effective working of the adjusting tube sub-assembly. system. ii) Loose jubilee clips and remove xi) All flexible hose pipes should be dust excluder and bush. tested in every POH. iii) Admit compressed air in brake cylinder, unscrew grub screw. 608 DESCRIPTION AND Vent compressed air and MAINTENANCE OF BOGIE unscrew collar by using C- MOUNTED BRAKE CYLINDERS spanner. remove hand brake (REFER RDSO SKETCH- 81200 & trunion. 81204) iv) Unscrew hex nuts M12 slowly. 608a Figure 6.3a & figure 6.3b (RDSO sketch. Please note that release spring 81200) gives the details of brake compressed with force of 60 kg. cylinders and the part number list is Note: The release spring exerts indicated in the table 6.2. severe force while dismantling the unit, the front cover should 608b Detail of 203 mm Air Brake Cylinder be removed very carefully. The (with slack adjuster) is given in figure 6.4 dismantling can not be done by a (RDSO sketch-81204) single person. Atleast two persons are necessary. 608c Hand Brake Attachment v) Remove front cover, release On the Piston trunk of brake cylinder spring, piston trunk sub- hand brake trunions are fitted whenever it assembly with trunion body and is required. During the service application ratchet with adjusting screw. the hand brake trunion does not move. vi) Remove split pin, pin and rocker The maximum hand brake stroke required arm. at the trunion corresponds to maximum vii) Remove allen bolts and piston brake cylinder stroke. and piston trunk sub-assembly. Please not that piston and piston 608d Re-Setting trunk sub-assembly are matched A red paint mark on the Adjusting tube pair and are not interchangeable. sub-assembly indicates that the piston unit Always put some identification has extended over its full range and mark. requires re-setting. The design of brake viii) Remove circlip, collar , ratchet rigging unit is done in such a way that with adjusting screw, pawl, pawl range of slack adjuster covers the life of spring, Plunger, turnion body, brake blocks so that resetting and thrust washer. replacing the brake blocks will be done at ix) Remove Piston packing from the same time. While keeping the piston. adjusting screw stationary, by turning the adjusting tube sub-assembly in clock wise 608g Cleaning and Inspection direction the distance between piston to cross head is reduced to minimum level. Wash all the parts in suitable cleaning The resetting of unit takes place at fluid and wipe them carefully. Inspect position. pawls, Pawl housing ring, ratchet, tooth rollers, roller plate, thrust washer for wear 608e Procedure for Re-setting and damage. Inspect threads of ratchet with adjusting screw and adjusting tube Hold the latch out of engagement with the for the possible damage. Replace packing. resetting plate. The adjusting tube should Check all the springs for possible be turned in clockwise direction by means corrosion and distortion. It is advisable to of the lugs until it reaches the inner end. change the springs on every POH. Give Then reengage the latch. all other parts a thorough visual inspection to detect apparent defects. Replace worn or damaged parts. Chapter 6, Page 6 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System Chapter 6, Page 7 of 14 Maintenance Manual for BG ICF Coaches A 9,10,11 3 6 7 8 2 4 5 12 14 15 1 13 18 19 16 32 21 20 24 28 17 23 22 25 29 30 19 26 18 31 52 50 51 61 47,48,49 Bogie Mounted Air Brake System 45,46 33 35 42 36,37,38 43,44 34 A 39 40,41,38 117.5 %%p0.5 CRS L HEAD EYE 546 TO C OF CROSS (CROSSECTION SHOWN IN HORIZONTAL PLANE TO SHOW THE LOCATION OF ROCKER ARM AND BUSH/FILTER ON THE SIDE OF CYLINDER.) VIEW OF BRAKE CYLINDER SUPERSEDED BY: INDIAN RAILWAY STANDARDS FIGURE 6.3a CORRECTED,ALTERNATIVE 4 - CD/8/2000 SIZE FOR ITEM 9 GIVEN 11/2000 ASSEMBLY DRAWINGS SUPERSEDES: E.M.U. STOCK AND SELF GENERATING AND DIMENSION 130 CHANGED TO 130%%P0.5mm REFERENCE:- SCALE P MAIN LINE COACHES. TOLERANCES ADDED ON C 3 - CD/3/99 8/99 1:1 DIMENSION 204 CRS %%P 0.5 D SK SRIVASTAVA 203mm AIR BRAKE CYLINDER T 2 - CD/35/98 TITEL CHANGED. 12/98 (WITH SLACK ADJUSTER) J.S. 1 1,16 CD/24/98 VIEW CORRECTED. 8/98 FLOPY No. :- R. D. S. O. GROUP 1 2 ALT. ITEM AUTHY. DESCRIPTION DATE B.G. (C) 3 4 SKETCH-81200 Chapter 6, Page 7 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System 58,37,38 57 56,11 %%p0.5 60 27 55 130 59 54 53 %%uNOTE:- 1. ITEM-17 WITH WASHER AND SPLIT PIN TO BE USED WHEN HAND BRAKE IS NEEDED. 2. BRAKE CYLINDER SHOULD BE LEAK PROOF WITH TESTING AIR PRESSURE 7 kg/sq.cm. 3. REFER RDSO SK-81057 FOR OTHER WORKING PARAMETERS. +0.5 -0 204 CRS %%USECTION A-A (FULL CROSSECTION OF CYLINDER SHOWN) VIEW OF BRAKE CYLINDER SUPERSEDED BY: CORRECTED,ALTERNATIVE INDIAN RAILWAY STANDARDS 4 - CD/8/2000 SIZE FOR ITEM 9 GIVEN 11/2000 ASSEMBLY DRAWINGS SUPERSEDES: AND DIMENSION 130 E.M.U. STOCK AND SELF GENERATING REFERENCE:- SCALE P MAIN LINE COACHES. FIGURE 6.3b CHANGED TO 130%%P0.5mm TOLERANCES ADDED ON C 3 - CD/3/99 8/99 1:1 DIMENSION 204 CRS %%P 0.5 D SK SRIVASTAVA 203mm AIR BRAKE CYLINDER T 2 - CD/35/98 TITEL CHANGED. 12/98 (WITH SLACK ADJUSTER) J.S. 1 1,16 CD/24/98 VIEW CORRECTED. 8/98 FLOPY No. :- R. D. S. O. GROUP 1 2 ALT. ITEM AUTHY. DESCRIPTION DATE B.G. (C) 3 4 SKETCH-81200 Chapter 6, Page 8 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System TABLE 6.2 Item Description & dimensions No. off Ref. Drg. Mtl. & Remarks spec. 1 Cylinder Body 1 SK-81201 Item 1, 3,4 & 5 2 Piston 1 SK-81203 Item - 1 3 Piston packing 1 SK-81204 Item -10 4 Plunger 1 SK-81206 Item - 2 5 Circlip Light B22 1 - IS:3075 Galv. 6 Special Washer 1 SK-81206 Item-14 7 Plunger Spring 1 SK-81206 Item-18 8 Piston Trunk 1 SK-81204 Item-1 & 2 9 Tee bolt M12x35 4 - Galv. Alternatively M12x45 10 Hex. head nut M12 4 - IS:1363 Galv. 11 Spring washer M12 type A 8 - IS:3063 Galv. 12 Dome cover 1 SK-81202 Item-1 13 Ratchet with adjusting screw 1 SK-81204 Item-9 14 Adjusting tube 1 SK-81204 Item-6, 7 & 8 15 Release Spring 1 SK-81206 Item-20 16 Guide bush 1 SK-81202 Item-2 17 Hand brake trunion 1 SK-81205 Item-12 18 Split pin φ5 x 40 3 - IS:549 Galv. 19 Washer M22 type -C 3 - IS:2016 Galv. 20 Slotted head grub screw 'C' 2 - IS:2388 Galv. M6x6 21 Jubilee clip size-5 1 - Galv. 22 Dust excluder 1 SK-81204 Item-11 23 Latch 1 SK-81206 Item-3 24 Latch spring 1 SK-81206 Item-21 25 Ring 1 SK-81206 Item-23 26 Slotted Nut 7/8" B.S.W. 1 - Galv. (20 mm high) 27 Shims for plunger As SK-81206 Item-16 required 28 Special washer 1 SK-81206 Item-12 29 Trunion Body 1 SK-81205 Item-1 30 Coller 1 SK-81206 Item-4 31 Circlip light A32 1 - IS:3075 Galv. Contd… on next page Chapter 6, Page 9 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System Item Description & dimensions No. off Ref. Drg. Mtl. & Remarks spec. 32 Plug ½" B.S.P. 1 - Galv. 33 Solid Taper pin φ 2 x14 1 - IS:2393 Galv. 34 Plunger pin 1 SK-81206 Item-11 35 Rocker arm 1 SK-81206 Item-1 36 Rocker arm pivot pin 1 SK-81206 Item-10 37 Special washer 2 SK-81206 Item-9 38 Split pin φ 3.2x18 3 - IS:549 Galv. 39 Roller 2 SK-81206 Item-5 40 Rocker arm roller pin 1 SK-81206 Item-9 41 Washer 1 SK-81206 Item-5 42 Roller Plate 1 SK-81201 Item-2 43 Bush 1 SK-81202 Item-3 44 Filter 1 SK-81202 Item-4 45 Guide bar 1 SK-81204 Item-3 46 Snap Head rivet φ 2.5x8 2 - IS:2155 Galv. 47 Hex. head bolt M6x25 8 - IS:2155 Galv. 48 Hex. nut M6 8 - IS:1363 Galv. 49 Spring washer M6 type A 8 - IS:3063 Galv. 50 Bush 1 SK-81206 Item-17 51 Jubilee clip size 2 1 - Galv. 52 Cross head 1 SK-81203 Item-2 53 Circlip light B16 2 - IS:3075 Galv. 54 Special washer 2 SK-81206 Item-15 55 Pawl spring 2 SK-81206 Item-19 56 Alen screw ½" BSFx 2"x7/8" 4 - Galv TD. length 57 Pawl housing ring 1 SK-81206 Item-6 58 Pivot pin 1 SK-81205 Item-3 59 Pawl 2 SK-81206 Item-8 60 Plunger 1 SK-81206 Item-7 61 Retaining nut 1 SK-81206 Item-24 Chapter 6, Page 10 of 14 Maintenance Manual for BG coaches of ICF design Bogie Mounted Air Brake System 63 Chapter 6, Page11of 14 Maintenance Manual for BG ICF Coaches 11 DRILL A 3 %%C13 DRILL 5 +0 +0.5 - -0.1 3 69.9 %%C21 6 %%C20 = = 60%%d 2 3 4 5 %%c14 +0.5 -0 1x45 %% D 2 +0.1 -0.5 %%c82 5 = %%c80 73 %%C52 +0.2 +0.2 -0. 5 2 3R -.5 3R % %c8 9 16 TP I (BSP) +0 %%C47 - 98.5 1 02 1 08 13 4 +0. 5 +0.0 3