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Begin OCR Text:
E_
_ _ _ _ e
_ROUP 21
D E__ _ _ ___ O _
_yLl_ DER _LO_K of 1 . 2. C3mShaft aKial loCation iS maintained by
__e çy__nder b_oçk (___ug__.a_.ion A) __g made oF gpe- meanS of a bronZe aKial waShef loçated at the front
'ç
___a_ çagt __ron and __g çagt .in a g_jng_e un_jEUR __he çy- end Of the Camshaft. AKial play iS determined by a
___nd'er boreg wh.içh are gurrounded by' çoo_._ng SpaCer ring behind the CamShaft gear, whiCh haS a
__3çkete, are m' açh.ined d__reçt_y ._n EURhe b_oçk The o.j_- steel hub. The valve tappets are açtuated directly
wayS __n t_e __oç_ are arranged go that the'o___ F.__ter by the CamShaft. They are loCated in holeS in the
wh__çh _ig
_oF EURUh'e Fu___-F_ow type ._g direçEUR_y attaçhed to' block above the CamShaft and trangfer movement
t_e r__g_t-_an_ S'___e oF the b_o'çk A re.in Forç,_ng braç- to the ValveS by meanS of push rodg and roCker
__et __g
_mo_untUe_ tUo EURhe çy__inder' b_oçk and F_ywhee_ afmS. There afe no inSpeçtion Couerg for the va_ve
__ouS__ng For ta
Uking up u_ibr
'at.jonS gee F._g 2-_ _ tappetg SinCe thege afe aççeSgible aftef the çylin-
_ ' ' _ ' def head haS been remOVed.
_YLl_DER H EAD A_ D VALVEj _o__E_i___ RoDj
The Cyljndef head iS SeCUfed to the bloçk by meang p_jio_j A_ D p_jio
__ R___j
Of bOltS. All the CombuStion Chamberg are m3çhined
thfoughouEUR and have Separate inleEUR and eKhaugt The ConneCting rodS are m3de of dfop-fofged Steel
portg, one for eaçh valve. and are prOV_ded With a preCiSion-maChined bugh
The valves, which are fitted Sugpended in the çy_in- Wh_Ch aCtS aS a bearlng for the gudgeon pin. The
der head, are made of gpeçial gtee_ and are çarried b_g-end bear_ng ShelIS are preC_SiOn-manUfaCtUred
in reptaCeable guideg. The va_ve gtemg are çhromed. and afe replaCeable.
The valve çoIIeEUR ig provjded with three _andg and The ß_StOnS are made Of light_aIloy and have two
thg va_ve wiEURh çorregpondino orooveS, wh_çh ho_d COmpreSS_On ringS and One O_l SCfaper ring. The '
the VaIVe but algo make Suit_ab__e rot3tion poggib_e. Upper COmßreSS_On r_ng IS ChrOmed in Order EURo re-
(Compare with fig. 2-22.) The valveg are provided dUCe Cyl_nder Wear.
with va_ve guide rubber Sealg. whiçh are mounted The gUdgeOn pin haS a flOating fit in both the pjSton
on the guideg. and ConneCting rod. The aKial movement of the gud-
The Coo_ing jaçketg are deSigned go thaEUR the air geOn pin iS l_m_ted by ClrClipS in the gudgeon pin
around the Spark plugS ig a_go çoo_ed. Water djgEURri- hOle_
bUt_On iS by meanS of a pipe, the water bejng di-
reCted toWardS the WarmegEUR partg of the engine.
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