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Begin OCR Text:
P
D E S C R I PT l O N
Tfis S8Nice Manual, which concerns B 18 B and On B 18 B engines, both tfe main and big-end
B 18 D engines, is intended as. a supplement to bearings consists of steel shells lined with indium-
the SeNice Manual for the 8 18 engine and there- plat8d lead_bronze bearing metal. On B 18 D (and
fore de8ls only with those components wfich are also B 18 A) engines, the be8r_ing metaI in the
characteristic for the B 18 B and B 18 D engines. main bearing shells coneiets of Babbit's metal.
Other instructions which are common for all the For other detaiIed information, see the specifica-
engines in the B 18 series are included in the tions at th8 end of this book.
SeNice Manual for the B 18 A engine. However,
the specifications at the end of this book are O_L _OOLER (a _8 a)
COmplete_ __h __ _ (F_ 6) _ f__ d b t _h __
0 Ol COO er Ig. IS l e e Ween e ol
filter and the cylinder block 8nd consists of an
GENERAL _nner eect;on for the o__ wh;çh ;S gurroundgd by a ,
_ The B 18 B and B 18 D engines are both fitted with cooling jacket. On its way to tfe oil filt8r, the oil
twin horizontal carburettors. passes through the cooIer and some of thB heat
' Since the B 18 B engine has a higfer compression in the oil is conducted away by th8 coolant. The
_ ratio and a camshaft with different timing, is has cooIant cannot pass the shortest way from the
, a higher output and also a higher rated speed. inlet (1) to the outlet (6), but is forc$d to circulate
_ The outputs are thus as follows. round the cool8r through ch8nnels formed by the
B 18 B (Q968OO) 1OO h.p. at 55OO r.p.m. (SAE) baffles (5). The oil is forced befw8en the pairs of
B 18 B (496812-817) 1O8 h.p. at 58OO r.p.m. (SAE) discs in turn due to the transvers8 bBffles (4) in
B 18 D (4968O2-15-16-18) 9O h.p. at 5OOO r.p.m. the discs and then finally passes ouf to the oiI
(SAE) filter.
Fig. t. Th$ $_gi_e _ie_ed from
the left.
1. Water outlet pipe
2. Intermediate piece for
crankcase ventilation
(B 18 B)
3. Front air cleaner
4. Oil filling c8p
_ _. Front carburettor
6. Rubber hose for crankca8e
ventilation (B 18 B)
7. Rear air cleaner
8. Rear carburettor
_ 9. Engine number
_ 1O. Oil dipstick
11. Rocker arm casing
_ 12. Distributor
13. Clamping screw
14. Retainer
, 15. Oil tr8p for crankc$se ven-
tilation (B 18 B)
16. Fuel pump
17. Fu8l hose
18. Timing gear casing
19. Water pump .
2O. Fan _ _o jg jg _j j6 j_ j_ j3 j_ ,,,o,,_,vj,_Dj,
2-1
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