(Servicing of
differential unit and adjustments)
Q1. What is need of differential
? Describe about functions of differential.
Ans. Vehicle ds wheels
fo'ks"k rkSj ij turning ds le; vyx&vyx speeds ij
?kwers gSA blfy, inner wheels (Hkhrjh ifg;ksa ) dks de distance
(nwjh) vkSj outwer wheels (ckgjh
ifg;ksa ) dks vf/kd nwjh r; djuh iM+sxhA ;g
dk;Z differential dh lgk;rk ls fd;k tkrk gSA
blds rhu dk;Z gS%&
(i) Engine dh power
dks gear box (fx;j
ckWDl) vkSj propeller shaft (izksiSyj 'kk¶V) ds }kjk
wheels rd igaqpkukA
(ii) Vehicle esa speed dks wheels dh final gear reduction (Qkbuy
fx;j fjMD'ku) dk dk;Z djukA
(iii) Turn ysrs
le; wheels dks vyx&vyx speed ij dk;Z djokrs gq, ikoj (Power) dks
wheels igqapkukA
Q2. What are the main parts
of differential? (fMQjsf'k;y ds eq[; Hkkx
dkSu&2 ls gSA)
Ans.
|
(i) Crown wheel (dzkmu Oghy) (ii) Drive shaft (Mªkbo 'kk¶V) |
(i) Sun gear (lu fx;j) (ii) Half shaft (gkWQ 'kk¶V) or left axle
/ right axle (ys¶V ,Dly@jkbV ,Dly) |
Q3. Differential dh adjustment (,MtLVesaV)
dSls djrs gSa \
Ans. Differential dh adjustment
vyx&vyx eksVkbZ (various thickness) dh shim ls dh tkrh gSA Crown
gear dks adjust djus ds
fy, cage assembly dh ckgjh rjQ adjusting
bolt fn;k gksrk gSA
Q4. Pinion vkSj crown wheel (dzkmu
Oghy) dh cSdyS'k fdruh gksuh pkfg,A
Ans. budh
backlash (cSdyS'k) 0.15mm ls 1.18mm ds chp gksuh pkfg,A
Q5. Sun gear vkSj planetary gear (IySusVsjh
fx;j) dh cSdyS'k (backlash) fdruh gksuh pkfg,A
Ans. ;g
0.10mm ls 0.20 rd gksuh pkfg,A
Q6. Crown wheel (dzmu Oghy) dh radial (jsfMy) run out (ju vkmV)
fdruh gksuh pkfg,A
Ans. bldh
radial run out 0.0025 mm ls vf/kd ugha gksuh pkfg,A
Q7. Differential (fMQjsaf'k;y) dh vkus okyh eq[; troubleshooting
ds ckjs esa crk,aA
Ans.
(i) Differential dk pyrs gq, vkokt+ djukA
|
Causes (dkj.k) (i) Final drive dh backlash dk improper gksukA (ii) Final drive ds tooth contact dk improper gksuk (iii) Vevel pinion (csoy fifu;u) (iv)Half Axle shaft ds spline (Likykbu) dk
f?kl tkuk |
Remedies (mik;) (i) Backlash dks adjust djsaA (ii) Final drive dks mfpr izdkj ls adjust
djsaA (iii) bls replace djsaA (iv) bls replace djsaA |
Drive dk
VªkalfeV u gksuk%&
|
Causes (dkj.k) (i) csoy fifu;u vkSj dzmu
Oghy (crown wheel) dh teeth VwV tkukA (ii) Sun gear ds teeth dk
VwV tkukA (iii) Half Axle
shaft dk VwV tkukA (iv) Axle shaft
vkSj Hub ds spline
dk [kjkc gks tkukA |
Remedies (mik;) (i) bls cny nsaA (ii) bls replace dj
nsaA (iii) bls replace dj
nsaA (iv) bls replace dj
nsaA |
Fill in the
Blanks:-
(i) A differential is a device employing
…………….. capable of transmitting ……………… and rotation through three shafts. (fMQjsaf'k;y ,d fMokbl gS ftlesa -------------------- gksrs gSa
tksfd ---------------------- dks VªkalfeV djus vkSj rhu 'kk¶Vksa }kjk jksVs'ku
nsus ;ksX; gksrs gS)
(ii) A vehicle wheel rotates at ………………..
speeds, especially when turning. (,d okgu ds Oghy
fo'ks"k rkSj ij VfuZax ds le; ------------------------- LihM ij ?kwers gSA)
(iii) Each wheel travels a different
distance through the ……………… , and that the inside wheels travel a ……………
distance than the outside wheels. (izR;sd Oghy ---------------------- ds }kjk fofHkUu nwjh r;
djrk gS vFkkZr Hkhrjh ifg;s ---------------------nwjh ckgjh ifg;s dh ctk; r;
djrs gSA)
(iv) Servicing of differential means
regular interval of oil has to be ……………. With proper ………… as per service
manual. (fMQjsaf'k;y dh lfoZl ls vfHkizk; fuf'kpr
varjky ij vkW;y dks ------------------ djuk tksfd lfoZl eSUv;qy ds vuqlkj mfpr
------------------ dk gSA)
(v) The backlash of pinion & crown
wheel) shoult not exceed …………to…………. mm (fifu;u
vkSj dzkmu Oghy dh cSdySl -------------------ls --------------------- mm ls vf/kd u gksA)
(vi) The backlash of sun gears and
planetary gears should not exceed …………… to ………… mm. (lu
fx;j vkSj IysusVjh fx;j dh cSdyS'k ----------------------ls
--------------------- mm ls vf/kd u gksA)
Ans. (i) Gear, torque
(ii) Different
(iii) differential,
shorter
(iv) Changed, grade
(v) 0.15 to 1.18mm
(vi) 0.10 to 0.20 mm
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