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,[XG G\AZ v Z(

,[XG GAZ v Z(. V[gHLG S],LU ;L:8D. ENGINE COOLING SYSTEM. C[T]VM. VF ,[XGDFYL TF,LDFYL "VM4 V[gHLG S],LU ;L:8DGL H~ZLIFT4SFI" 4 5|SFZ4 V[Z S],LU ;L:8D4 JM8Z S],LU ;L:8D4 JM8Z S],LU ;L:8DGF EFUM4 V[gHLG VMJZ CL8LU YJFGF SFZ6M lJU[Z[ lJX[ XLBX[P.

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,[XG G\AZ v Z(

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  1. ,[XG G\AZ v Z( V[gHLG S],L\U ;L:8D ENGINE COOLING SYSTEM

  2. C[T]VM • VF ,[XGDF\YL TF,LDFYL "VM4 • V[gHLG S],L\U ;L:8DGL H~ZLIFT4SFI" 4 5|SFZ4 • V[Z S],L\U ;L:8D4 JM8Z S],L\U ;L:8D4 • JM8Z S],L\U ;L:8DGF EFUM4 • V[gHLG VMJZ CL8L\U YJFGF SFZ6M lJU[Z[ lJX[ XLBX[P

  3. ,LSJL0 S},L\U ;L:8DGL SFI"5wWlT

  4. V[gHLGDF\ S],L\U ;L:8DGL H~ZLIFT [ Need of Cooling system in engine ] • V[gHLGDF\ 5FJZ :8=MS NZdIFG SdAxIG R[dAZDF\ OI]V,G]\ NCG YJFYL4 V[gHLG B]AH UZD YFI K[P HM VF UZDLG[ SFA]DF\ ZFBJFDF G VFJ[ TM JF<J A/L HJF4l5:8GG]\ ;L,Lg0Z ;FY[ ;Lh YJ] lJU[Z[P p5ZF\T ,]A|LS[8L\U VM., UZD YJFYL 5FT/] YTF\ T[GF U]6WDM" GFX 5FDTF T[ ,]A|LS[XGG]\ SFD SZL XSX[ GCLPT[YL EFUMDF\ S|[S 50JFGM T[DH A[|S YJFGM ;\EJ ZC[ K[P VFD YT] V8SFJJF4 V[gHLGG]\ GMD", JlS"U 8[d5Z[RZ HF/JL ZFBJF DF8[ S],L\U ;L:8D H~ZL K[P

  5. S],L\U ;L:8DGF 5|SFZ [ Type of Cooling system ] • V[gHLGDF\ S],L\U ;L:8D D]bI A[ 5|SFZGL CMI K[P • !P V[Z S],L\U ;L:8D • ZP JM8Z S],L\U ;L:8D

  6. !P V[Z S],L\U ;L:8D [ Air Cooling system ] • V[Z S],L\U ;L:8DJF/F V[gHLG CJFYL 9\0F YFI K[P • T[GL ZRGFDF\ ;L,Lg0Z a,MS VG[ ;L,Lg0ZC[0GL AFCI ;5F8L 5Z S],L\U OLg; CMI K[P • V[gHLGGL UZDL pQ6TFJCGGF lGID D]HA S],L\U OLg;DF\ VFJX[ VG[ JFTFJZ6GL CJF OLg; ;FY[ VY0FTL CMJFYL T[ V[gHLGG[ 9\0] ZFB[ K[P • VF 5wWlTYL V[gHLG ;\TMQFSFZS 5|DF6DF\ 9\0] Y. XST] GYLP • T[GM p5IMU GFGF 8] :8=MS V[gHLGMDF\ H[JFS[ :S]8Z4 ZL1FF4DM5[04DM8Z ;FIS, lJU[ZDF\ YFI K[P

  7. !P V[Z S],L\U ;L:8D [ Air Cooling system ] :5FS" %,U CJFGM 5|JFC l5:8G S],L\U OLg;

  8. V[Z S],L\U ;L:8DGF OFINF [ Advantages of Air cooling system ] • !P V[Z S],L\U ;L:8D ;FNL VG[ ;Z/ CMJFYL C,SL VG[ ;:TL CMI K[P • ZP T[DF\ S]NZTL CJFGM ;LWM p5IMU YTM CMJFYL sEFUM J5ZFTF G CMJFYLf GFGF JFCGMDF\ OL8 SZL XSFI K[P • #P VF ;L:8D AU0TL GYLP T[YL D[g8[Gg; BR" YTM GYLP • $P 9\0F 5|N[XM S[ HIF\ 5F6LGM AZO Y. HTM CMI tIF\ p5IMU SZL XSFI K[P • 5P Z6 H[JF 5|N[XMDF\ S[ HIF\ 5F6LGL TS,LO CMI tIF\ p5IMU SZL XSFI

  9. V[Z S],L\U ;L:8DGF U[Z OFINF [ Dis advantages of Air cooling system ] • !P V[Z S],L\U ;L:8D JW] SFI"1FD GYLP T[YL ,F\AL D]XFOZL DF8[ lJ`JF;HGS GYLP T[GL SFI" 1FDTF VMKL CMI K[P • ZP VFJF V[gHLGMGF EFUM GMG O[Z; WFT]GF J5ZFTF CMJFYL EFUMDF\ 3;FZM JW] 50[ K[P ,F\AFUF/[ DM\WL 50[ K[P • #P S],L\U OLg; p5Z DF8L v SRZM HDF YTF\ S],L\U VMK] YFI K[P • $P V[Z S]<0 V[gHLG RF,TL JBT[ VJFH JW] SZ[ K[P

  10. ZP JM8Z S],L\U ;L:8D [ Water Cooling system ] • JM8Z S],L\UJF/F V[gHLG 5F6LYL 9\0F YFI K[P T[GL ZRGFDF\ 5F6LGF 5ZLE|D6 DF8[ ;L,Lg0Za,MS VG[ ;L,Lg0Z C[0DF\ JM8Z H[S[8 VF5[,F CMI K[P • JM8Z H[S[8DF\ 5F6L ZC[ K[P H[ V[gHLGG[ 9\0] ZFB[ K[P • JM8Z S],L\U ;L:8D DF[8F JFCGM H[JFS[ A;4 8=S4 SFZ lJU[Z[DF\ p5IMU YFI K[P

  11. ZP JM8Z S],L\U ;L:8D [ Water Cooling system ] • JM8Z S],L\U ;L:8DGF 5|SFZ [ Types of water cooling system ] • JM8Z S],L\U ;L:8DGF A[ 5|SFZ K[P • !P YDM" ;FIOG JM8Z S],L\U ;L:8D • ZP 5d5 ;ZSI] ,[8L\U JM8Z S],L\U ;L:8D

  12. !P YDM";FIOG JM8Z S],L\U ;L:8D [ Thermosyfen water cooling system ] • JM8Z 5d5 CMTM GYLP • 5],LG[ A[<8YL UlT VF5[, CMI K[P • V5Z 8[gSG]\ HM0F6 CM; 5F.5YL C[0 ;FY[ VG[ ,MVZ 8[gSG]\ HM0F6 a,MS ;FY[ SZJFDF\ VFJ[ K[P • a,MS VG[ C[0DF\ JM8Z H[S[8 CMI K[P H[DF\ 5F6L EZ[, ZC[ K[P • T[DF\ YDM":8[8 JF<J CMI K[P • ZRGF[Construction]

  13. !P YDM";FIOG JM8Z S],L\U ;L:8D • SFI" 5wWlT [Working ] • HIFZ[ V[gHLG UZD YFI K[ tIFZ[ JM8Z H[S[8G]\ 5F6L V[gHLGGL UZDLG]\ XMQFL4 5MT[ UZD YFI K[P • UZD 5F6LGL WGTF VMKL CMJFYL JHGDF\ C,S] Y.4 ;L,LPa,MSDF\YL ;L,LPC[0DF\ VG[ CM;5F.5 DFZOT[ Z[0LI[8ZGL V5Z8[gSDF\ HFI K[P • Z[0LI[8ZDF\ 8I]A wJFZF V5Z 8[gSG]\ UZD 5F6L ,MVZ 8[gS TZO HTF\4 S],L\U O[GYL Z[0LI[8Z OLg; DF\YL 5;FZ YTL CJF UZD 5F6LG[ 9\0] SZ[ K[P • 5F6LGL WGTF JWTF4 JHGDF\ EFZ[ YJFYL ,MVZ 8[gSDF\ VFJ[ K[ VG[ tIF\YL CM; 5F.5 wJFZF ;L,LP a,MSDF\ HFI K[P • VFD4V[gHLGDF\ 5F6LG]\ 5ZLE|D6 YFI K[P

  14. ZP 5d5 ;ZSI],[8L\U JM8Z S],L\U ;L:8D • ZRGF [ Construction ] • Z[0LI[8ZDF\ 5F6L ;\U|C SZJFDF\ VFJ[ K[P • Z[0LI[8Z V5Z 8[gS HM0F6 ;L,LPC[0 ;FY[ VG[ ,MVZ 8[gS HM0F6 ;L,LPa,MS ;FY[ SZJFDF\ VFJ[ K[P • ;L,LPa,MS VG[ ;L,LPC[0DF\ JM8Z H[S[8 CMI K[P H[DF\ 5F6L EZ[, ZC[ K[P • S],L\U O[G q O[G 5],L4 V[gHLGGL ACFZ VG[ JM8Z 5d5 a,MSDF\4V[SH XFO8 5Z OL8 CMI K[P H[G[ A[<8YL UlT VF5JFDF\ VFJ[ K[P • ;L,LPC[0 VG[ V5Z CM; 5F.5 JrR[ YDM":8[8 JF<J A[;F0[, CMI K[P

  15. ZP 5d5 ;ZSI],[8L\U JM8Z S],L\U ;L:8D • HIFZ[ V[gHLG UZD YFI K[P tIFZ[ JM8Z H[S[8 G]\ 5F6L V[gHLG UZDL\ XMQFL UZD YFI K[P • UZD 5F6LGL WGTF VMKL CMJFYL JHGDF\ C,S] Y.4 ;L,LPa,MSDF\YL ;L,LPC[0DF\ VG[ CM; 5F.5 J0[ Z[0LI[8Z V5Z 8[gSDF\ HFI K[P • Z[0LI[8Z 8I]A wJFZF V5Z 8[gSG]\ UZD 5F6L ,MVZ 8[gS TZO HTF\4 S],L\U O[GYL CJF Z[0L I[8Z OLg;DF\YL 5;FZ YTF 5F6LG[ 9\0] SZ[ K[P • 5F6LGL WGTF JWTF JHGDF\ EFZ[ YJFYL ,MVZ 8[gSDF\ VFJ[ K[ VG[ tIF\YL CM; 5F.5 wJFZF JM8Z 5d5 J0[ B[\RF. NAF6YL ;L,LP a,MSGF JM8Z H[S[8DF\ HFI K[P • VFD4 V[gHLGDF\ 5F6LG]\ 5ZLE|D6 YFI K[P • SFI" 5wWlT[ Working ]

  16. V[ZS],L\U VG[ JM8ZS],L\U ;L:8D TOFJT [ Difference between Air and Water cooling system ] • V[Z S],L\U ;L:8D JM8Z S],L\U ;L:8D • !P T[DF\ V[gHLG CJFYL 9\0] YFI K[P !P T[DF\ V[gHLG 5F6LYL 9\0] YFI K[P • ZP T[DF\ ;L,LPa,MS VG[ ;L,LPC[0GL ZP T[DF\ ;L,LPa,MS VG[ ;L,LPC[0DF\ AFCI ;5F8L 5Z OLg; CMI K[P JM8Z H[S[8 CMI K[P • #P JHGDF\ C,SL VG[ lS\DTDF\ ;:TL K[P #P JHGDF\ EFZ[ VG[ lS\DTDF\ DM\WL K[[P • $P ,F\AL D]XFOZLDF\ lJ`JF; HGS GYLP $P ,F\AL D]XFOZLDF\ lJ`JF; HGS K[P • 5P AU0JFGM ;\EJ ZC[TM GYLP 5P AU0JFGM ;\EJ ZC[ K[P • &P VF ;L:8D HuIF VMKL ZMS[ K[P &P VF ;L:8D HuIF JW] ZMS[ K[P • *P GFGF JFCGM H[JFS[ :S]8Z4DM8Z *P DM8F JFCGM H[JFS[ 8=S4A;4D[8F0MZ • ;FIS,4 ZL1FFDF\ p5IMU YFI K[P DF\ p5IMU YFI K[P

  17. JM8Z S],L\U ;L:8DGF EFUM [ Parts of water cooling system ] • !P Z[0LI[8Z [ Radiator ] • :YFG [ Location ] v • Z[0LI[8Z V[gHLGGF S],L\U O[GGF VFU/GF EFU[ R[;L; p5Z OL8 YFI K[P • SFI " [ Function ] v • Z[0LI[8Z V[gHLGGF UZD 5F6LG[ 9\0] SZ[ K[P

  18. JM8Z S],L\U ;L:8DGF EFUM • Z[0LI[8Z SMZGF p5ZGF EFU[ V5Z 8[gS A[;[ K[P • V5Z 8[gS p5Z OL,Z G[S CMI K[P • OL,Z G[S p5Z 5|[;Z S[5 A[;F0JFDF\ VFJ[ K[P • Z[0LI[8ZGF JrR[GF EFU[ 8I]A VG[ OLg;GL AG[, SMZ CMI K[P • Z[0I[8Z SMZGF GLR[GF EFU[ AM8D 8[gS A[;[ K[P • AM8D 8[gSGF p5Z 0=[.G %,U VF5[, CMI K[P • SFI" 5wWlT v

  19. JM8Z S],L\U ;L:8DGF EFUM • Z[0LI[8Z [ Radiator ]

  20. Z[0LI[8ZGL SF/HL [ Maintanance of Radiator ] • !P Z[0LI[8ZDF\ 1FFZJF/] q SRZFJF/] U\N] 5F6L EZJ] GCLP Z[0LI[8Z S],g8GM p5IMU SZJMP • ZP Z[0LI[8ZDF\ S],g8 ,[J, R[S SZTF ZC[J]P HM ,[J, VMK] CMI TM pD[ZJ]P • #P Z[0LI[8Z CM; 5F.5MG]\ HM0F6 S,[d5YL ;BT 8F.8 SZJFP ,LS[H ZC[ GCLP • $P Z[0LI[8Z ,LS[H CMI TM ;M<0ZL\U q A|[hL\U SZL BFDL N]Z SZJLP • 5P Z[0LI[8ZG[ ;DIF\gTZ[ .G ;F.0 q VFp8 ;F.0 O,;L\U SZJ]P • &P 9\0F 5|N[XMDF\ Z[0LI[8ZDF\ V[g8L O|LH ;M<I]XGGM p5IMU SZJMP • *P 9\0F 5|N[XMDF\ Z[0LI[8Z X8X" GM p5IMU SZJMP

  21. ZP CM; 5F.5 [ Hose pipe ] • CM; 5F.5 Z[0LI[8Z VG[ V[gHLGG]\ HM0F6 SZ[ K[P T[ ZaAZGL AG[, CMI K[P T[ O,[S;LA, CMJFYL Z:TF 5ZGF BF0F 8[SZFG[ ,LW[ JFCGG[ ,FUTF VF\RSF ,FUTF CM; 5F.5 T]8L HJFGM ;\EJ ZC[TM GYLP

  22. #P JM8Z 5d5 [ Water pump ] • :YFG [ Location ] v • JM8Z 5d5 V[gHLGGF VFU/GF EFU[4 ;L,Lg0Z a,MSDF\4 S],L\U O[GGL XFO8 5Z A[;[ K[P VG[ O[G A[<8 J0[ UlT D[/J[ K[P • SFI" [ Function ]v • JM8Z 5d5 Z[0LI[8ZGL ,MVZ 8[gSDF\YL 9\0] 5F6L B[\RL V[gHLGGF JM8Z H[S[8DF\ DMS,[ K[ VG[ NAF6YL 5F6LG[ S],L\U ;L:8DDF\ 5ZLE|D6 SZFJ[ K[P

  23. 5|SFZ [ Type of Water pump ] • !P ;[g8=L OI]U, 8F.5 JM8Z 5d5 [ Centrifugal Type Waterpump ] • ZP .d5[,Z 8F.5 JM8Z5d5 [ Impalar Type Water pump ]

  24. !P ;[g8=L OI]U, 8F.5 JM8Z 5d5 [ Centrifugal Type Water pump ] • VF 5|SFZGF 5d5GL AM0LDF\ V[S ZM8Z VFJ[, CMI K[P • O[G A[<8GL DNNYL JM8Z5d5 XFO8 OZTF ZM8Z OZ[ K[P • 5F6L ;SXG Y. 5d5 AM0LDF\ VFJ[ K[ VG[ NAF6YL VFp8 ,[8DF\YL ACFZ GLS/L JM8Z H[S[8DF\ HFI K[P

  25. ZP .d5[,Z 8F.5 JM8Z5d5 [ Impalar Type Water pump ] • ZRGF q EFUM [ Construction / Parts ]v • 5d5 XFO84 • O[G CA4 • .d5[,Z4 • ;L<0[0 A[ZL\U4 • 5d5 .G,[84 • VFp8 ,[8 • 5d5 CFp;L\U s 5d5 AM0L f

  26. ZP .d5[,Z 8F.5 JM8Z5d5 [ Impalar Type Water pump ] • SFI" 5w3lT [ Working ] • VF 5d5GL AM0LDF\ .d5[,Z VFJ[ K[P • O[G A[<8GL DNNYL JM8Z 5d5 XFO8 OZTF ZM8Z OZ[ K[P • 5F6L ;SXG Y. 5d5 AM0LDF\ VFJ[ K[ VG[ NAF6YL VFp8 ,[8DF\YL ACFZ GLS/L JM8Z H[S[8DF\ HFI K[P

  27. JM8Z5d5 [ Water pump ] • SFI" 5w3lT [ Working ]

  28. #P S],L\U O[G [ Cooling Fan ] • :YFG [ Location ] v • JM8Z 5d5 XFO8 5Z V[gHLGGF ACFZGF EFU[ S],L\U O[G VG[ 5],L VFJ[ K[P • S],L\U O[G Z[0LI[8Z GL 5FK/GL AFH]V[ CMI K[P • SFI"[ Function of Cooling Fan ] v • S|[gS XFO8 5],L VG[ O[G A[<8GL DNNYL S],L\U O[G OZTF\ T[ CJFG[ 5MTFGL TZO B[\R[ K[P H[YL CJF Z[0LI[8Z SMZDF\YL 5;FZ Y. UZD 5F6LG[ 9\0] SZ[ K[P

  29. $P O[G A[<8 [ Fan belt ] • V[gHLGGF S|[gS XFO8GL UlT S],L\U O[G q JM8Z 5d54 VM<8ZG[8Z q 0FIG[DMG[ O[G A[<8 J0[ VF5JFDF\ VFJ[ K[P O[G A[<8 ZaAZDF\YL AG[, CMI K[P • T[G[ V[gHLGDF\ OL8L\U SZTL JBT[ T[G]\ 8[gXG IMuI V[0H[:8 SZJFDF\ VFJ[ K[P • HM O[G A[<8 ,]h OL8L\U CMI VYJF T]8L UI[, CMI TM V[gHLG S],L\U ;L:8D SFD SZX[ GCLP H[YL V[gHLG VMJZ CL8 YX[P • VM<8ZG[8Z q 0FIG[DM lJ3]T pt5gG SZX[ GCLP H[YL A[8ZL 0L; RFH" ZC[X[P • HM O[G A[<8 8F.8 CX[ TM JM8Z 5d5 A[ZL\U4S|[gS A[ZL\U4 0FG[DM q VM<8ZG[8Z A[ZL\UDF\ W;FZM h05YL YX[P • O[G A[<8 T]8L HX[P

  30. 5P YDM":8[8 JF<J [ Thermostat Valve ] • :YFG [ Location ]v • YDM":8[8 JF<J Z[0LI[8Z V5Z 8[gS CM; 5F.5 VG[ ;L,Lg0Z C[0 JrR[4 V[<AMDF\ A[;[ K[P • SFI" [ Function OF Thermostate Valve ]v • YDM":8[8 JF<J V[gHLGG]\ JlS"\U 8[d5Z[RZ HF/JL ZFBJFG]\ SFD SZ[ K[P

  31. JlS"\U [ Working OF Thermostat Valve ]v • HIFZ[ S],L\U ;L:8DDF\G]\ 5F6L 9\0] CMI tIFZ[ YDM":8[8 JF<J A\W CMI K[P • H[YL V[gHLGG]\ 5F6L Z[0LI[8Z TZO HT] GYLP • HIFZ[ S],g8 GMD", JlS"\U 8[d5Z[RZ[ V[8,[ S[ 80 00LU|L YL 90 00LU|L ;[P SZTF JW] 5CM\R[ tIFZ[ YDM":8[8 JF<J B],[ K[P • H[YL V[gHLGDF\YL UZD 5F6L Z[0LI[8Z TZO H. XS[ K[P JF<JGL A\W l:YlT JF<JGL B]<,L l:YlT

  32. YDM":8[8 JF<J [ Thermostat Valve ]

  33. V[gHLG VMJZ CL8 YJFGF SFZ6M [ Reasons of Engine Over heating ] • !P Z[0LI[8ZDF\ V5]ZT] 5F6LP • ZP O[G A[<8 ,]h OL8L\U VYJF T]8[, CMIP • #P Z[0LI[8Z 8I]A T[DH OLg; RMS V5 s SRZFYL EZFI[, f CMIP • $P JM8Z H[S[8DF\ SF8 ,FU[, CMI VYJF RMS V5 CMIP • 5P Z[0LI[8Z CM; 5F.5 4 JM8Z 5d5 lJU[Z[ HuIFV[YL 5F6L ,LS[H YT] CMIP • &P YDM":8[8 JF<J B],TM G CMI VYJF JW] p\RF TF5DFG[ B],TM CMIP

  34. V[gHLG VMJZ CL8 YJFGF SFZ6M • *P JM8Z 5d5 SFD SZTM G CMIP • (P ;L,LPC[0 ,]h CMI VYJF ;L,LPC[0 uIF;S[8 S|[S CMI • )P .uGLxIG T[DH JF<J 8F.DL\U IMuI G CMIP • !_P S],L\U O[G p\WM OL8 YIM CMIP • !!P V[gHLGDF\ VM., G CMIP q VMK] CMIP q IMuI U|[0G] G CMIP • !ZP l5:8G C[0 q SdAxIG R[dAZDF\ SFA"G HDF YJFYL 0L8MG[XG q l5| .uGLXG YT] CMIP

  35. 5|`GM • S],L\U ;L:8D S[8,F 5|SFZGL CMI K[ m • V[Z S]<0 V[gHLGGF OFINF SIF SIF K[ m • V[gHLGDF\ S[J] 5F6L JF5ZJ] HM.V[ m Z[0LI[8Z O,; XF DF8[ SZJ]\ 50[ K[ m • S],L\U ;L:8DDF\ YDM":8[8 JF<J XF DF8[ ZFBJFDF\ VFJ[ K[ m • JM8Z 5d5 VG[ Z[0LI[8Z JrR[ ZaAZ CMh S[D ,UFJJFDF\ VFJ[ K[ m • JM8Z S],L\U ;L:8DGF U[Z OFINF H6FJM m

  36. p5;\CFZ • VFH[ VF ,[XGDF\YL 4 • V[gHLG S],L\U ;L:8DGL H~ZLIFT4SFI" 4 5|SFZ4 • V[Z S],L\U ;L:8D4 JM8Z S],L\U ;L:8D4 • JM8Z S],L\U ;L:8DGF EFUM4 • V[gHLG VMJZ CL8L\U YJFGF SFZ6M lJU[Z[ lJX[ XLbIFP • CJ[ 5KLGF ,[XGDF\ ,]A|LSg8 lJX[ XLBLX]P

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