GonarWEMOFMDlA MMLSTRY OF RAILWAYS

RESEARCH DESIGNS AND STANDARDS ORGANISAnON MCKNOW

MANUAL OF INSTRUCTIONS.FOR

MAINTENANCE OF MEASURING FRAMES

OF TRACK RECORDING CARS A

REPORT NO. 2'31-9

TRACK MACHINES & MONITORLXG DIRE.CTORAIT

T h i s n a i n t e n a n c e manual is b a s e d on e x p e r i e n c e ga ined

i n t h e d a y t o d a y m a i n t e n a n c e o f T r a c k R e c o r d i n g C a r s under t h e

T r a c k H a c h n i e s & H o n i t o r i n g (T.H.H.) D i r e c t o r a t e o f RDSO.

Al though e v e r y c a r e h a s been t a k e n f o r i n c o r p o r a t i n g a l l t h e

n e c e s s a r y i n s t r u c t i o n s and g u i d e l i n e s with s u p p o r t i n g in fo rma t ion

f o r e f f e c t i v e m a i n t e n a n c e , t h e s e a r e s u b j e c t t o m o d i f i c a t i o n from

t i n e t o t i m e i n t h e l i g h t of e x p e r i e n c e i n f u t u r e . F u r t h e r t h e

g u i d e l i n e s d o n o t n e c e s s a r i l y r e p r e s e n t t h e v i e w s o f M i n i s t r y of

Ra i lways ( R a i l w a y Board ) , Government of I n d i a . '

T h i s r e p o r t is t h e p r o p e r t y o f t h e RDSO and is meant

e s s e n t i a l l y f o r o f f i c i a l u s e . I t may n o t be l o a n e d . reproduced i n

p a r t o r i n f u l l o r q u o t e d as an a u t h o r i t y w i t h o u t t h e permiss ion

o f D i r e c t o r G e n e r a l , RDSO.

A . K . VERHA Direc tor /TH-IV

A.P. UISHRA E x e c u t i v e Director/TH

LBL DESCRIPTION

1 . Introduction

. . 2 . Configuration of measuring frame 1

3 . Important bogie clearances 3

4 . POH of TRC coahces 4

5 . Hounting of measuring frame af ter 5 POH/Repairs

6 . Daily maintenance of .-measuring frame 6

7 . Half yearly check 7

8 . Precautions during recording runs and 7 i d l e movement of TRCs

9 . Spare par@ for measuring frame 8

10. Annexure-I 9

11. Annexure-XI 11 & 12

. 1 . l n t r o d n c t i o n : The T r a c k r e c o r d i n g c a r s (TRCs) a r e equipped w i t h a m e a s u r i n g f r a m e mounted on t h e 3 m e a s u r i n g b o g i e . The s e n s o r s f o r s e n s i n g d e f e c t s - o f g a u g e and a l i g n m e n t are .mounted on t h e m e a s u r i n g f r a m e . Measurement o f t r a c k parameter is p o s s i b l e a t s p e e d u p t o 100 km/h on w e l l n a i n t a i n e d t r a c k . A t h i g h e r s p e e d s , t h e f e e l e r s are p r o n e t o l o o s e c o n t a c t w i t h t h e r a i l r e s u l t i n g i n i n a c c u r a c y i n r e c o r d i n g . T h i s h a p p e n s p a r t i c u l a r l y a t l o c a t i o n s of sha rp c h a n g e s i n t h e r a i l a l i g n m e n t ( a l i g n m e n t k inks , p o i n t o f e n t r y i n t h e t u r n o u t s e t c ) where s p u r i o u s l a r g e p e a k s c a l l e d " f l i c k s " may be r e p o r t e d . T h e r e f o r e t h e s p e e d of r e c o r d i n g s h o u l d b e r e d u c e d where r u n n i n g is rough . For r e c o r d i n g , t h e TRC is g e n e r a l l y c o u p l e d a t t h e . r e a r end o f a s p e c i a l t r a i n .

2 . C o n f i g u r a t i o n o f : The body of t h e m e a s u r i n g f r ame b a s i c a l l y H e a s u r i n g f r a m e c o n s i s t s of two l o n g i t u d i n a l beams he ld

e q u i d i s t a n t by two o r t h r e e p a i r s of c r o s s - beams. The f r a m e is mounted on t h e pr imary s p r i n g b a s e a t t h e o u t e r a x l e - b o x e s of t h e m e a s u r i n g b o g i e . The m e a s u r i n g f r ame p r o v i d e d i n t h e H e c h a n i c a l TRC h a s two sets of c r o s s beams [ F i g . l ( a ) l . Each s e t o f c r o s s - b e a m s c a r r i e s 2 s p r i n g l 'oaded f e e l e r p l a t e s , one f o r t h e l e f t r a i l and o n e f o r t h e r i g h t r a i l .

a3 2 . 2 F o r m i c r o p r o c e s s o r b a s e d TRCs, o n l y , one s e e of

, .- -

f e e l e r b l a d e s is needed w h l c h a r e p r o , ~ i z e g - ~ n -

t h e 3 r d s e t o f t h e c r o s s - b e a m s p r o v i d e d i ~ t h e e x t e n d e d p o r t i o n of t h e l o n g i t u d i n a l beam. T h i s f a c i l i t a t e c a l i b r a t i o n o f t h e t r a n s d u c e r s a s t h e y c a n b e e a s i l y a c c e s s e d , b e i n g o u t s i d e t h e b o g i e . Houeve r , it is f o u n d t h a t d u e t o g r e a t e r dynamic e f f e c t , t h e l a t e r a l a c c e l e r o m e t e r 'nounted on t h e f r a m e g e t s damaged and t h e r e is s l i g h t o v e r r r p o r t i n g o f d e f e c t s d u e t o t h e f e e - l e r d y n s n i c s . F o r t h i s r e a s o n , t h e e x t e n d e d For- t i o n h z s been removed f rom TRC 225 & 2 5 ~ 3 2 . The f e e l e r s e r e p r o v i d e d on t h e p a i r of c r o s s - b e s m s b e t s s o n t h e o u t e r m o s t a x l e and t h o m i d d l e a x l e [ F i g . l ( t j ] The s a n e s h a l l b e done f o r o t h e r two T R C s (TRC 823 & 7973).

. , !.

2 . 3 F o r H i c r o p r o c e s s o r b a s e d TRCs, 3 - a x l e s b o g i e is n o t n e e d e d . T h e r e f o r e , t h e 3 - a x l e b o g i e s ezy b e

, '

3

r e p l a c e d w i t h s t a n d a r d t w o - a x l e I C F bog B e c a u s e o f t h e d i f f i c u l t i e s i n m a i n t e n a n c e a n a r e p a i r s o f t h i s s p e c i a l b o g i e o f t h e 3 - a x l e b o g i e s , t h e POH a n d n a j o r r e p a i r s c a n be t a k e n up o n l y a t t h e n o m i n a t e d w o r k s h o p (C&W Workshop, L a l l a g u d a , S . C . R l y . ) .

2 . 4 A f r a m e h a s b e e n d e s i g n e d f o r t h e 2 - a x l e b o g i e s , d e t a i l s are shown i n [ F i g . l ( c ) ] . I t h a s 3 s e t s o f c r o s s beams w i t h t h e f ee le r mounted on e x t e n d e d p o r t i o n . The c r o s s - b e a m s f a l l i n g i n t h e b o g i e s p a c e are s i n g l e beams w h e r e a s t h e o u t e r o n e h a s a p a i r o f beams w h i c h a l s o c a r r y t h e f e e l e r b l a d e s . ; T h e e x t e n d e d p o r t i o n is n e c e s s a r y b e c a u s e d u e t o s h o r t a g e of s p a c e be tween t h e w h e e l s and t h e b o l s t e r , i t is n o t p o s s i b l e t o p r o v i d e a p a i r o f c r o s s - b e a m s t h e r e . A l l members o f t h e f r a m e a r e made of p r e s s e d s t e e l c h a n n e l ( I S . s p e c i f i c a t i o n ) o f 125 rnm x 50 mm. H i d d l e p o r t i o n o f t h e L o n g i - t u d i n a l beam is r e d u c e d i n c r o s s - s e c t i o n i n o r d e r t o p r o v i d e e wide w i n d o u f o r t h e f r e e p l a y o f t h e b o l s t e r .

2 . 5 H .S .Lugs (made o u t o f 1 2 mm t h i c k p l a t e s ) a r e welded on t h e p r i m a r y a p r i n g b a s e o f a x l e b o x e s f o r h o l d i n g t h e f r a m e . The c o n n e c t i o n o f t h e f r a m e . w i t h t h e l u g s is t h r o u g h e c c e n t r i c b o l t s ( 6 N o s . ) . T h e d e t a i l s of t h e e c c e n t r i c b o l t a r e shown i n Fia.2. On t h e l e a d i n g ( t o w a r d s t h e m i d d l e o f t h e c o a c h ) e c c e n t r i c b o l t s , t h e l o n g i t u d i n a l beams are mounted w i t h round b e s r i n g s . T h i s is t h e f i x e d e n d o f l o n g i t u d i n a l b e a n s . The t r a i l i n g e n d is mounted w i t h r e c t a n g u l a r b e a r i n g s w i t h n l i d i n g a l l o w a n c e s o f 15 mm i n b o t h l e a d i n g and t r a i l i n g d i r e c t i o n s . T h i s is t o a l l o w l o n g i t u d i n a l p l a y o f wheel G e t s c a u s e d b y a n g u l a r m o t i o n on c u r v e d t r a c k . The d e t a i l s o f t h e b e a r i n g s and b u s h e s a r e shown i n u.

2 . 6 The f e e l e r s p l a c e d o p p - - e a c h . - o t n e r -Ere-

s u p p o r t e d b y s e l f - a l i g n e d b a l l - b e a r i n g s i n t h e c r o s s beams. T h e b a l l b e a r i n g s a l l o w f r e e l a t e r a l movement o f f e e l e r s u i t h t h e v n r i n t i o r ~ s of l a t e r a l p r o f i l e o f t h e r a i l g a u g e f a c e s . The a p p l i c a t i o n s p r i n g s , o n e f o r e a c h f e e l e r , a t t a c h

t h e u p p e r arm o f t h e L-frame ( w h i c h c a r r i e s t h e f e e l e r s ) t o t h e h o l d i n g p l a t e s mounted on the c r o s s - b e a m s by s t e e l wire c a b l e , w i t h LVDT i n be tween . T h e s p r i n g s a re housed i n s i d e G I p i p e c a s i n g s . T h e s p r i n g s h e l p i n k e e p i n g t h e f e e l e r s i n c o n t a c t w i t h r a i l g a u g e f a c e - w i t h s p e c i f i e d l o a d o f 18 +_ 2 Kg. x

2 . 7 . . The - c o n t a c t s u r f a c e o f t h e f e e l e r b l z d e s with r a i l g a u g e f a c e is p r o v i d e d w i t h f o u r c a r b i d e t i p s b r a z e d i n a n . S . p l a t e ( F i g . 4 ) . ' The c a r b i d e

- . , " I .

t i p h o l d e r is f i t t e d on t h e f e e l e r b l a d e w i t h CSK b o l t s . The f e e l e r a r e so d e s i g n e d t h a t wheh t h e b o t t o n l e v e l o f t h e f e e l e r s b l a d e is a t 14nn be low t h e r a i l t o p , t h e l o n e r - h a l f p o r t i o n of t h e c a r b i d e t i p s u i l l t o u c h t h e r a i l gauge f a c e and u p p e r h a l f w i l l b e above t h e r a i l head. T h i s a l l o w a t m o s p h e r i c c o o l i n g o f t h e h e a t g e n e r a t e d d u e t o c o n s t a n t f r i c t i o n between r a i l and c a r b i d e t i p s d u r i n g r e c o r d i n g . . .

3.Ilportant Bogie : P e r f e c t mount ing o f M e a s u r i n g frame and its Clearances s t a b i l i t y d e p e n d s upon good r i d i n g q u a l i t y

o f t h e m e a s u r i n g b o g i e . The recommended d i m e n s i o n s (Ref. S k e t c h N0.75055 of T e c h n i c a l P a m p h l e t N0.C-7501 and IRCA P a r t - I V ) which a r e g e n e r a l l y c o n s i d e r e d good p r a c t i c e , t h e a d o p t i o n of wh ich w i l l l e a d t o good r u n n i n g of TRC ~ n d p r o p e r moun t ing o f m e a s u r i n g f r a m e a r e d e t a i l e d be low. A d e p a r t u r e f rom t h e s e d i m e n s i o n s must n o t b e a l l o w e d . These d i m e n s i o n s s h o u l d b e c h e c k e d b e f o r e t a k i n g o u t t h e TRC from t h e s h o p a f t e r e v e r y POH/IOH and d u r i n g s e r v i c e and a r e c o r d t o b e m a i n t a i n e d .

i ) w h e e l d i a . a ) A f t e r POH 9 1 5 mn max. b ) Dur ing u s e 900 mm min

ii) B u f f e r H t . a ) Unloaded c o a c h 1105 mn b ) Loaded c o a c h 1030 mn

i i i ) H t . o f B o g i e f r ame a t 4 c o r n e r s 652 ma

i v ) H t . o f p i v o t s e a t o f 3 a x l e b o g i e 920 a m

V ) H t . o f a x l e box . a ) F r e e h e i g h t 315 mm s p r i n g o f 3 a x l e b) Loaded h t . 244 O, b o g i e ( d i a 218 mm) -

0.

v i ) - a s above - a ) F r e e h t . 360 mn 03 f o r 2 a x l e b o g i e b ) Loaded h t . 259 mm

v i i ) H t . o f b o l s t e r a ) F r e e h e i g h t 385 m m s p r i n g o f b o t h b ) Loaded " 263 mm b o g i e s . ( D i a 260 m m )

v i i i ) C l e a r a n c e between a ) F o r 2 a x l e 36 .00 mm a x e l box crown and b o g i e ( 8 ) +_ 2 . 0 0 m m b o g i e f r a m e . b ) For 3 a x l e 3 4 . 5 m m

b o g i e (C) 5 2 . 0 0 mm

i x ) C l e a r a n c e between a ) F o r 2 a x l e 4 0 . 0 0 mm b o l s t e r and b o g i e b o g i e ( 0 ) +_ 3 . 0 0 mm f r a n e b ) F o r 3 a x l e 2 5 . 0 0 .nm

b o g i e ( C ) +_ 3 . 0 0 nm

Hote : i) A l l h e i g h t s a r e t o b e measured f r o n r a i l l e v e l f o r i t e n ii t o i v above.

i i ) T a r e l o a d o f t h e coach is cons ide red 42 t o n n e s .

4 . WHof TRC : i) B e f o r e p l a c e m e n t i n C&W Depot/Shop : coaches.

( a ) TRC t o b e p l a c e d i n S&T Shop, SC.Rly.. S e c u n d e r a b a d f o r d i s m o u n t i n g t h e Heasor ing f r a m e a n d t h r o u g h i n s p e c t i o n of a l l p a r t s one b y o n e b y S&T s t a f f f o r r e p l a c e m e n t i f r e u i r e d .

Note : T h i s w i l l f a c i l i t a t e t h e S & T shop i n m a n u f a c t u r i n g t h e p a r t s d u r i n g t h e p e r i o d t h e c o a c h w i l l b e i n C&W s h o p .

( b ) A l l t h e l u g s welded w i t h t h e a x l e box h o u s i n g s are t o b e numbered w i t h p a i n t a f t e r t e s t i n g t h e n ( f o r wear and t e a r ) i n S&T Shop. Numbering o f l u g s t o b e done s t a r t i n g from l e a d i n g end o f TRC LHS 1 ,3 & 5 and RHS 2 , 4 & 6 .

ii) D u r i n g t h e POH i n CLW Shop/Depot :

T h e RDSO s t a f f t a k i n g o v e r t h e TRC from the .C&W workshop a f t e r POH s h o u l d check t h a t t h e f o l l o w i n g are c o m p l i e d .

( a ) New w h e e l s o f 915 mm d i a , f i t t e d w i t h new D i r e c t Hounted b e a r i n g s a r e p r o v i d e d .

( b ) S l o t t e d j o u r n a l u sed f o r Tacho a r e f i t t e d i n p r o p e r l o c a t i o n .

( c ) T i l t e d ax le -box is n o t a l l o w e d .

. ( d ) A l l o t h e r measurements a s mentioned i n p a r a 3 a r e f u l f i l l e d .

( e ) Axle box h o u s i n g s v e l d e d w i t h HS Lugs . a r e f i t t e d i n c o r r e c t p o s i t i o n s f o r p r o p e r moun t ing o f m e a s u r i n g f r a m e .

( f ) B e f o r e t h e TRC coach is t u r n e d o u t , t h e c o a c h is p l a c e d on good t r a c k p i t l i n e and t h e measurements o f coach as s t i p u l a t e d p a r a 3 a r e checked and r e c t i f i e d b e f o r e s e n d i n g t h e coach t o t h e S&T Shop.

5 . Honnting of : A t t h e t i m e of t a k i n g o v e r t h e TRC from t h e S&T measuring frme Workshop a f t e r P O H , i t s h o u l d be checked t h a t after WH/repairs t h e f o l l o w i n g a r e c o m p l e t e d .

i ) On :new wheel ( d i a . 9 1 5 nm) t h e c e n t r e of

m e a s u r i n g f r a m e e c c e n t r i c b o l t s ( f i t t e d . I w i t h l o c a t i n g p i n s i n b o t t o n most h o l e of HS Lug) s h o u l d b e a t a h e i g h t o f 257 nn from r a i l level.': -

The e c c e n t r i c i t y of t h e e c c e n t r i c b o l t be ing 7 . 5 om it can c o n p e n s a t e a wheel wear of ( 7 . 5 + 7 . 5 ) = 1 5 nn i n r a d i u s , by a d j u s t i n g t h e l o c a t i o n o f t h e p i n f r o n bot tom h o l e ( n o r n a l p o s i t i o n ) t o t o p on HS Lug.

i i ) The H e a s u r i n g F r a n e c a n b e s h i f t e d b o t h l o n g i t u d i n a l and v e r t i c a l l y by a d j u s t i n g t h e p o s i t i o n o f a l l t h e l o c a t i n g p i n s a t a t i n e on - t h e s a n e h o l e s o f t h e HS l u g s and m a i n t a i n i n g 15 nn c l e a r a n c e a t each s i d e s of r e c t a n g u l a r b e a r i n g s .

( a ) Haxinum a l l o w a b l e L o n g i t u d i n a l 7.5 mm s h i f t f rom normal p o s i t i o n t o w s r d s l e a d i n g / t r a i l i n g end

( b ) Haximum a l l o u a b l e v e r t i c a l s h i f t 15 mn f r o n n o r m a l p o s i t i o n o f e c c e n t - r i c b o l t .

.!%

iii) E c c e n t r i c b o l t must b e f i t t e d f a c e t o f a c e on t h e H.S. Lugs f o r its e n t i r e c o n t a c t a r e a .

i v ) B e f o r e m o u n t i n g t h e l o n g beams, t h e f o l l o w i n g d i m e n s i o n s o f t h e e c c e n t r i c b o l t s need t o b e v e r i f i e d : - ...

( a ) H e i g h t of a l l b o l t s from R a i l l e v e l must b e 257.5 am.

.*.

( b ) LHS b o l t m u s t - b e p e r f e c t l y o p p o s i t of RHS b o l t .

0 ( c ) : L a t e r a l d i s t a n c e between b o l t s id

o p p o g i t e s i d e i . e . LHS & RHS nust*- e q u a l . 0

( d ) L o n g i t u d i n a l d i s t a n c e b e t v e e n t h e b o l t s o f LHS must be e q u a l t o t h e b o l t s of RHS.

V ) A l l b o l t s used a t a n y j o i n t n u s t p a s s s t r a i g h t t h r o u g h h o l e s .

vi) The l e a d i n g end of f e e l e r s i n working p o s i t i o n m u s t b e a t a n i n . d i s t a n c e o f 70 ne f r o n t h e wheel f l a n g e .

I v i i ) In no c a s e t h e t o t a l l e n g t h of f e e l e r s t o be 1

reduced f r o m 1280 nu. . -, . .: I i

v i i i ) The f i t t i n g s and f i x t u r e s provided f o r mount ing of t h e f rame a c c e l e r o m e t e r and LQDT and t h e v e r t i c a l LVDTs a r e i n good condi t ion .

6.Daily Hain ten- :Heasur ing Frame and o t h e r e q u i p n e n t s m u s t be I an ce checked eve ry day b e f o r e c a l i b r a t i o n and

I logbook t o be ma in t a ined eve ry day a s per proforma g i v e n i n Annexure-I. .

i) A l l b o l t s & n u t s t o b e t e s t e d by tapping the heads of b o l t s w i t h s t r o k e of l i g h t hammer.

i i ) C o n d i t i o n of wi re - rope , i ts a l ignment , t ens ion a l o n g w i t h t i g h t n e s s of wi re - locks t o be checked b e f o r e check ing t h e f e e l e r t ens ion . F e e l e r t e n s i o n t o be ma in t a ined w i t h i n 18 kg f 2 kg.

iii) Depth of f e e l e r b l a d e bottom edge from the r a i l t o p (14mm) and wear of c a r b i d e t i p s t o be checked . A f t e r 6 om wear of c a r b i d e t i p s , t h e h o l d e r s shou ld b e t u r n e d u p s i d e down and can be r e -used . The f l a r e d ends of f e e l e r s must be 10 am from t h e r a i l . Excep t ca rb ide t i p s no o t h e r p a r t of f e e l e r should touch the r a i l .

i v ) Be fo re t e n s i o n i n g , t h e f r e e movement of f e e l e r s must be checked t o t e s t t h e condi t ion of f e e l e r - b e a r i n g s .

V ) ~ i t t i n g s of LVDTs and Accele ' rometers must be checked f o r p rope r h o l d i n g s o t h a t t h e f i t t i n g s do n o t g e t loosened d u r i n g r e c o r d i n g due t o v i b r a t i o n s .

Base p l a t e s of v e r t i c a l LVDTs t o be cleaned and l u b r i c a t e d aith-grease - 3-r - f r e e l a t e r a l movement of t h e LVDT r o d .

v i ) . L u b r i c a t i o n of a l l b e a r i n g s m u s t be done from . t h e n i p p l e s .

v i i ) On t h e day of f o r n a t i o n - o f TRC s p e c i a l , b e f o r e b e g i n i n g of a r e c o r d i n g programme, d e t a i l e d

I c a l i b r a t i o n check of t h e t r a n s d u c e r s should be c a r r i e d o u t and r e c o r d kept a s p e r t h e proforma g iven i n Annexure I I ( a ) and I I ( b ) .

7 .Half yearly : i ) The measur ing f r a n e should be dismounted. A l l check p a r t s a r e t o be c l eaned and checked f o r

p e s r / c r a c k s . H.S.Lugs t o be checked by sound t e s t .

ii) Any f i t t i n g found d e f e c t i v e n u s t be rep laced

- iii) B e f o r e , m o u n t i n g t h e m e a s u r i n g frame t h e T R C m u s t b e p l a c e d on good t r a c k p r e f e r a b l y on a p i t l i n e . ,

i v ) E c c e n t r i c b b l t s t o b e f i t t e d i n t h e H.S.Lugs tQ h e i g h t o f 257.5 mn f rom t h e r a i l top . Care to b e t a k e n t o p l a c e t h e l o c a t i n g p i n s i n t h e sane h o l e o f t h e same s i d e o f t h e e c c e n t r i c bol t - T h i s w i l l a l l o w e q u a l c l e a r a n c e s (15 sm a t each s i d e ) f o r t h e r e c t a n g u l a r b e a r i n g s . D e t a i l s a r e g i v e n . i n P i g . 3 ( a ) 8 (b). -

V ) F r e s h r u b b e r p a c k i n g s are t o b e used a t the j o i n t of l o n g beam and c r o s s beam.

v i ) A l l n u t s t o b e s e c u r e d w i t h s p l i t p i n s .

v i i ) Alignment o f w i r e - r o p e must be main ta ined a d j u s t i n g t h e p o s i t i o n o f u i r e - p u l l i e s .

p i i i ) Depth o f f e e l e r ( l 4 m n below r a i l t o p ) n u s t be a d j u s t e d by s h i f t i n g t h e p o s i t i o n of l o c a t i n g p i n s of e c c e n t r i c - b o l t s o n l y .

i x ) F e e l e r t e n s i o n s p r i n g s must b e p l a c e d p e r f e c t l y i n t h e a l i g n m e n t of c a s i n g p i p e t o avo id

.. . . . ' f r i o t i o n d u r i n g f u n c t i o n .

8.precmtiods during idle roverant of TBCa md rncording rans

Y

- ( i ) F e e l e r t e n s i o n t o b e r e l e a s e d . . The feelers . s h o u l d b e l i f t e d f u l l y , clamped w i t h d o u b l e b o l t s and c h e c k n u t s .

( i i ) V e r t i c a l LVDT r o d s a r e t o be clamped t o c r e a t a g a p of minimum 50 an f r o b t h e base p l a t e s . ,

( i i i ) A l l n u t s and b o l t s are t o b e t e s t e d .

8 . 2 Due t o v i b r a t i o n t r a n s m i t t e d from t h e b o g i e , and t h e 6 f o r c e s e x e r t e d by r u b b i n g of f e e l e r b l a d e s a g a i n s t t h e gauge f a c e o f t h e r a i l , t h e v a r i o u s f i t t i n g s may get loosed d u r i n g r u n n i n g and c r a c k s may d e v e l o p i n t h e v a r i o u s menbers of t h e measur ing f r a n e p a r t i c u l a r l y a t t h e j o i n t s . I t i s , t h e r e f o r e , n e c e s s a r y t h a t d u r i n g r e c o r d i n g r u n , a s w e l l a s i d l e run whenever t h e TRC s t o p s a t any s t a t i o n d u r i n g day time t h e s t a f f s h a l l conduct a check v i s u a l l y a s w e l l as by t a p p i n g w i t h a l i g h t hammer t h e measur ing f rame whenever t h e t i n e p e r n i t s t o s e e t h a t t h e v a r i o u s components and f i t t i n g s a r e i n o r d e r and c r a c k s have n o t o c c u r r e d . If a n y u n s a f e c o n d i t i o n is o b s e r v e d , i t s h o u l d be set r i g h t immedia te ly . I f t h e problem is s e r i o u s and c a n n o t be

. -- -

1 s e t r i g h t , t h e TRC s h o u l d b e d e t a c h e d . ,

9.Spax-e parts: T h e f o l l o w i n g s p a r e p a r t s s h a l l b e k e p t i n each f o r TRC: frame

1. A x l e b o x c o v e r 2. S p l i t p i n s f o r a x l e box b o l t s 3. E c c e n t r i c b o l t s a i t h n u t and s p l i t p i n 4 . Long bean b r a s s ( round and r e c t a n g u l a r )

c o m p l e t e w i t h Bush and S l e e v e . 5. B o l t and n u t s o f s i z e s a i t h s p l i t p i n . 6 . F e e l e r f r a m e 7 . F e e l e r b l a d e 8 . C a r b i d e t i p h o l d e r 8. B a l l b e a r i n g f o r f e e l e r f r a m e 18. Wire cable 11. Lock n u t s 12. LVDT F i x i n g c l amp 13. Vert ical LVDT l i n k - 14 . Vert ical LVDT b a l l . 15. Hard r u b b e r p a c k i n g p l a t e s .

I tern Sr.No.: : Remarks w i t h . * : d a t e of i n spec t j

( a ) L e f t f e e l e r

( b ) Right f e e l e r , ,. ( i ) '

1 -a

(B) ~ k n e r a l clondit ion of f i t t i n g s of fae ' ler - - . .. - " . - b l a d e s and b r a c k e t s . , , . <

(C) ~ h e t h e r t h e r e a r e any s i g n s of damage o r c r a c k i n t h e long and- c r o s s beam j o i n t s of measuring frame and b r a c k e t s of a x l e bqx (Checking by t app ing w i t h l i g h t hammer) -

.'. ' . .

2 . Eaw&dtransducers.LYPTlinks. locknuts and novements'pf

. - , - (b ) V e l t i c a l LVDT ( L ~ R ) ( c ) Acc. ( U N R & U N L ) (13 j , Aco . VAC .:

( e ) Acc.LAC ."" , . r. , ( f ).Act. (Frame) y . : (..

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(a)PLYL & FLYR :b)CLZL & CLZR (c)CAYL & CAYR (d)CAZL & CAZR (e)CAV

- ( f )CAL

4 . .:Tachamlbkclonnectians:

Tacho I

Tacho I1

5 . \ I n a r p f t h Q c a r b i d e m p f f e e l e r s :

( a ) Left f e e l e r . . . - . . , .

( b ) Right f e e l e r

6 . Depth of the bottom edge of t h e f e e l e r blade from the r a i l top

(a) Left f ee l er

(b) Right f e e e l r

7 . Any other remarks.

Signature of t h e inspecting supervisor

TRC N O . . ......... LVDT NO .......... DATE OF CHEKING ....... . . ................................................................. LVDT core u . ! Q ! r ~ ~ I k i ~ movement POSTIYE YBLllE in nm

HEGATIVEPBLilE REnARRS I L I L L I b Y l u L I I X U d P U

SIGNATURE OF THE IHSPECTIHG SUPERVISOR

TRC NO.. ......... -- - .

. . . . . . . . . ACCL. NO.AND TYPE

DATE OF CHEKING .......

Acc. tilt ~ Q L ! T E U 3 : U I U in Degree RINGHT W LEE31TUlT REHdRKS

. u A Y L L B X , 1nLUAYu .................................................................

SIGNATURE OF THE - - -INSPECTING SUPERVISOR

******

. . TRC Ho. . . . -

. . - - ' D a t e . . .

. .. (1) Cond i t i on of e c c e n t r i c b o l t &d - - . . C " -

. . . , eccentric . p i n - a n d r ep l acemen t , . . - . . - . . - ~ --- .

. - - . . . - . . . . -?,;.;;.if. n e c e s s a r y . &- . ~ .. . .- . . . . -. .I. . * .-. . - -. . , _ > - i . . -- ' . - ' . . . - -. . .- . - I

- - -" . (2) ' c o n d i t i o n o f brass bushes &d clearances :. . ..

(i) L e f t s i d e (ii) Right side

( 3 ) . Condi t ion of 1204 b e a r i n g s

( 4 ) ' condi t to ; of t e n s i o n s p r i n g s .

( i) L e f t side (ii) Righ t s i d e

(5) Condi t ion of w i r e ropee . p u l l i e s , lock n u t s ' t e n s i o n b o l t s e t c .

(6 ) Condi t ion of c a r b i d e t i p s , f e e l e r blades and L-frame . .

,-

(5) L e f t e i d c

', . . (i i) Right side . - -

( f ) Gometal c o n d i t i o n of window b r a c k e t ' and window b r a c k e t Brass bush.

( 8 ) Checking of UN LVDT f i t t i n g s .. . . .-

. - ( i ) _LyIlT_Guade-~&;----. - - - . - -

(ii) C u p and t h e c o n d i t i o n ai t o p sliding p l a t e r e s t i n g t h e LVDT r3d/LVDT c o r e .

(iii) Balls i n c l u d i n g small b o l t s .

( i v ) Greas ing e t c .

%Signa ture of t h e I n s p e c t i n g o f f i c i a l '

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