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This technical circular from the Western Railway Electrical Department outlines procedures for moving locomotives with trimount bogies that have one defective or locked axle. It includes detailed instructions for floating the affected axle, both with and without a wheel set trolley, and emphasizes the importance of following safety precautions and guidelines issued by RDSO. The circular supersedes previous instructions and mandates that all relevant loco sheds and units prepare the necessary materials and equipment for implementation.

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72 views17 pages

259

This technical circular from the Western Railway Electrical Department outlines procedures for moving locomotives with trimount bogies that have one defective or locked axle. It includes detailed instructions for floating the affected axle, both with and without a wheel set trolley, and emphasizes the importance of following safety precautions and guidelines issued by RDSO. The circular supersedes previous instructions and mandates that all relevant loco sheds and units prepare the necessary materials and equipment for implementation.

Uploaded by

Jude Aldons
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2.2 WESTERN RAILWAY ELECTRICAL DEPARTMENT TECHNICAL CIRCULAR No. 259(2009) (TROITRS) No.EL TRO/TRS/259 (2009) Dated 02/07/2009 Sub: Movement of locomotive with tiimount bogies as light engine with one defective/locked axle floated. Ref: RDSO’'s instruction Builetin No. MP.iB.VL-01.02.07 Rev.00). RDSO vide letter No.EL/3.2.13/6 di.14/5/99 has issued the technical circular No.40 regarding procedure &items required for floating a wheel set of WAG7, WCAM & WCAG-1 Loco, for movement of the locomotive having locked axle. The same was reiterated vide this office Tech. Circular No. EL/TRO/TRS/31 (G9)dt. 27.07.99. Now RDSO vide letter No.S.V.IB dt. 24.03.09 has issued Inctruction Bulletin No. MP.IB.VL-01.02.07 (Rev.00)regarding movement of Locomotives with trimount bogies as light Engine with one defective/locked axe. This can he done by floating the affected axle with or without using the wheel set trolley. A copy of this Instruction Bulletin is circulated for implementation of these instructions. This technical Circular supersedes all the prior TC's & instruction on the items deait in the above referred RDSO letter. All loco sheds / TRO units should arrange the material’ equipments required for fioating the wheel sets. The precautions & procedure in each case must be followed as per RDSO guide lines while floating the locked axle as well as during the movement of these locomotives. Encl: As above. ( i rd For Chief Electrical Engineer Ay GS ZETY/BRE — 68 (NBD BRE TIS DaPaWaRL 3 el et 31}41s- 7 wn DE GOVERNMENT OF INDIA MINISTRY OF RAILWAYS: RESEARCH DESIGNE & STANDARDS ORGANISATION U) MANAK NAGAR, LUCKNOW ~ 226 014 No. SVB INSTRUCTION BULLETIN No. MP.iB.VL- 01.02. 4, TITLE Movernent of locomotives with timount bogies as light engine with one ‘e‘ectiv="ocked axle floated. 2. INTRODUCTION There may be instances when axle of locomotives gets lockedidefective (due tc wheel flats) on the mid section thus blocking the Railway traffic movernent on the effected section. Under such an eventually, it becomes the top priority to move the affected locomotive to the nearest station/loco snediloco workshop and restore the traffic, A detailed procedure hes been prepared ee rvement of such locomotives with trimount bogies as ight engi + with ove defective axle ~Zocted (12 he lockedletectve axe in ted colton). Different instructions ave been issued in this context at different instanc:s of time. Some Guetiesidlriioaions have been raised by Zonal Ralways/Safety Directorate regarting implementation of these instructions. The issues/clarifcations reported | sought have been studied and recompiled in this Instruction Bulletin (IB) to redress oribThi 8 susereadesal”/ tl CAUSES FOR FLOATING OF AXLES Floating of axles is resorted to in the following conditions: i Axle oller bearing seizure. ji. Traction motor suspension bearing seizure ii, Traction motor roller bearing seizure. iv. Heauy skidding of wheels. 4, REFERENCE _ Railway Board's Letter No. 2004 / M(L) / 468 / 7104 / Vol. Il dated 12.: matter "Movement of trimount bogie diesel / electric Locomotives with one = as light engine’ 106 under subject ive axle floated 5, TECHNICAL CONTENTS / INSTRUCTIONS =nt of locomotives with trimount bogies as light engine with one defective/locked axle © by floating the affected axle with or without using the wheel set tolley as folios: 4, Movement of locomotive with trimount bogies as light engine & having one defective axle floated “WITHOUT USING WHEEL SET TROLLEY” A. Basic Requirements for “FLOATING” of locked/defective axle without _using b a Ye wheel set trolley \3957)}\ foloning items shoud bs aveabe et ste, bef iting he locke defective axe he DL sapeifswo nydrauicjecks having minimum capaci of 25 tones each sift WEG — mer os a Y 3M, 4 1 504 BY) ii The distance pieces i.e “wooden blocks" to fil up thie gap between axle box and hydraulic jacks, if required. iii, Two numbers of steel plates of size 300ram x 300mm x 30mm, which may be required for making the foundation firm and levelled for jacks. 1v. Wooden wedges (a least 6 nos.) v. Resilient blocks of thermoplastic polyurethane elastomeric mate ial as per the material, dimension and design conforming to sketches attached in Annexure should be used. ems Minimum quantty of resiient block nos.1, 2 & 3 requited shall ve 02, 02 & 04 respectively. me vi. Chainiwire rope for securing the’ atte locomotive t vii, Toolbox. ne Precautions & Procedure for “FLOATING" of lockedidefective axle without using wheel set trolley yee Fo redress various issuesilaricalions reported by Zonal RallwaysiSafety Directorate ‘on this issue, the procedure has been studied and suitably revised as follows. 4 Precautions while floating locked/defective axle i. Apply wooden wedges at Whe8Is’8rfe affected locomotive to prevent ling ji, Release all the brakes of the affected bogie, which requires lifting. Make the brake rigging of affected axle ineffective il, Before the application of jacks for liting, ensure that the ground below the lifting jacks is frm and levelled. Due care must be taken to avoid jacks slipping off. 2 Procedure for floating of lockedidefective axle a. When one of the end axles (Le Axle Nos. *, 3, 4 or 6) gets locked! defective i. Liftwheels on both sides of the defective axle simultereously with the help of hydraulic jacks in such a way that clearance of whee! from rail level is at least 60 mm, Provide resilient biock no. + between the axle box and pedestal caps. Before packing of resiien, biock, proper fastening of pedestal caps should be ensured, After packing ine resilient block, release the jacks. ii Ui the bogie frame at both end axles of the affected bogie by hydraulic jacks and provide resilient block no. 2 packing between the bogie frame ‘nd the top of axe box 6f middle axle. The resilient blook no. 3 should be placed between bogie frame & top of axle box of unaffected end axle Resilient blocks are provided between the axle box top and bogie treme 0 that the load is transmitted directly from the bogie frame to the axle box through the reslient blocks and thus refieve the load on the coil springs which other wise would be highly compressed. After packing, release the jacks simultaneously. b, When one of the middle axis ‘Axle Nos. 2 or §) cts locked i. Lift wheels on both sides of the defective middle 2 € simultaneously with the help of hycrauilcfadks in such a way that clear. noe of wheel from rail level is at least 50 mm, Provide resilient block no.1 betweer: the axle box and pedestal caps. Before-packing of resilient block proper fastening of pedestal caps should be ensured. After packing the resilient biook, release the jacks axle in ited position during movement of ii Lift the bogie frame at ooth end axles of the affected bogie by hydraulic jacks and provide resilient block no. 3 packing between the bogie frame ‘and the top of axle boxes of both the end axles. After packing, release the jacks simultaneously. Under this condition, the total load on the bogie shall be directly transferred to the end axle boxes through tt« resilient blocks and thus relieve the load on the coll springs which «thr wise would be highly compressed as mentioned above. ' ©. Precautions & Procedure for “MOVEMENT” of locomotive with one locked/defective axle floated without us wheel set trolley ‘4 Precautions during movement of locomotive with floated lockedidefective axle i. The pedestal caps of the defective axle are property fastened. ii. The resilient block packing are properly secured to avoid their slippage during locomotive movement. Secure the affected axle in lifted position using wire rape / chain iii Relevant traction motorltraction motor group of the effected bogie is isolated. ¥y. Movement of only one locomotive-having defective axle in floated concition is permitted at a time as light engine, \v. If the locomotive Raving déféctié axle iff floated condition is intended to negotiate ghat sections and grades thereof, the local train operation instructions lke speed restrictions etc. should be followed, if sey are more restrictive, in addition to the other technical instructions contained in this 1. vi. Incase, the floated axle happens to be a leading axle and tumcuts/points have to be negotiated, the locomotive shall be brought to a stop befare the turnout ‘and escorting staff should detrain and monitor the passage of locomotive over the turnout vi. Movement of locomotive with a defective axle in floated condition shail be avoided during extreme winter conditions when temperatures below 8°C are reported, especially during night time viii The additional instructions regarding movement of such locometives are enclosed at Annexure 1. Precaution to be observed during movement of such crigpled locomotives on bridges, instructions gives at annexure 5 should be kept in view. ix. Any other special instructions issued by Rallway Board in tris context x. In case operation on track structure. consisting of rai £2kg, M+7, 250mm )) ballast cushion or superior as well asin case of SOR rail, M+4 sleeper density | and 200 mm ballast cushion, movement without WHEEL SET TROLLEY can | be considered up to speed 20k in straight track and 15kmph on curves respective of degree of curve. — .2. Procedure for movement of iocomotive a. In case of axle roller bearing seizure, traction motor suspension bearing seizure and heavy skidding of wheels. In such cases 7 |. Float the concerned axle as per the procedure elaborated above. ii Isolate the particule traction mator / traction motor group of the affected bogie. If Wore ocomete as ight nse on its own power with the maximum speed restricted to 20 kmph on straight track and 15 kmph on curved track irrespective of degree of curve to clear the blocked section or to move the affected locomotive to the nearest station/loco shedlloco workshop and restore the traffic. A close watch is necessary while passing over curves ‘and tumouts. The locomotive should be escorted by Permanent way!» competent locomotive shed / workshop staff. Requirement of permanent way stat escort is optional, However, in such case permanent way staff should be intifiated about such s movement. b. Incase of traction motor roller bearing seizure In such cases, i. Remove the pinion of affected traction motor. ii, Isolate the affected traction motor / traction motor group of the affected bogie ii, Work the locomotive as a light engine on its own power. In this case, the ling of. affected axle, the restition on speed, single locomotive operation as well as escoring by Fa anent ‘say! locomotive shed / workshop staf is not necessary. However, the local train operation jnstnictions like temporary / permanent soeed restrictions etc. should be followed, if they are more restrictive ¢, In case of traction motor roller bearing seizure and when removal of its pinion is not possible in such case, the procedure for floating the relevant affected axle and locomotive movement procedure as in case of axle roller bearing seizure, i traction motor suspension bearing seizure and heavy

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