Weifang 495 - Page 56

I-oil sump;2--Lower side .,over;3--Gear case cover gasket;4---G;ear,qase;
5-- Front olain bearing cap; 6-,- ,,-- Middle main bearing and its lo:w~r: ~al~~~ ~-
Crank-shaft front oil seal; 8-. -Middle main bearing upper half; 9-Front, and rear m~in
bearing upper half;lO--Gear case gasket; l1--Idling gear and shaft; 12-"Camshaft
. front bushing-; 13-- Gear case cover; 14-- Breather and oil filler sub--'asseiribly;
15-, -Cylinder block; 16--Cylinder liner water seal; 17--Cylinder'head stild 1:3'5;
18-- Cylinder head nut; 19--' Cylinder liner; 20-- Cylinder'head·stud'116·;2I-'-~'
Cylinder head gasket; 22--Drain cock; 23--Camshaft middle .and ,~~~~~,~us.hlng·,; ~~~
Flywheel housing with inspecting hole and TDe mark ; 25--;Crank$99£t~:~ar oHse:~l;
26--C·rankshaft thrust ring; 27--Front and rear main bearing lo~er ;half ; 2;8-;. -Rear
> ',', ~, :
main bearing cap; 29 ........ - Cover; 3'0-- oil temperature gauge ~dapter;' 31- Oil ~rain
plug.
" A "-- The distance between the top surfaces of 'cylinder liner ana cylinder; block:
0.06-0. 16mm.
The crankcase and the cylinder block are cast integrally with
reinforced, ribs inside. The distance from the centreline·,.of. the
crankshaft to the bottom of the cylinder block is 120 mm. Cy'l!-nder
liners of wet type are fitted in the cylinder block and;~stit{'~1 its
': ";, t,,~,-(., .:: .... ~~. ,.~.~;:;; :.'
upper shoulders. The top surface of the liners ate hishef-:!llah""the
top suface of the block by o. 06~O. 16 mm on ac:counfk)f'fastening
~ ~', -', ~ .. ~..:' .
the liners positi,rely and its difference in height betw¢en any two
lirlers on the same engine should be no more than o. 0,5 mm. There
are two ru'bber seal rings installed on the lower seal belt of the
cylinder to prevent cooling water from entering the crankcase.
Five rIlain bearings ar'e distributed in the crankcase. The main
bearin.g caps are located by locating sleeves an.~-machin.ed in pair
with the corresponding bearing seats on the crankcase ,so that the
caps canrft be interchanged or turned ,inside out.'There fore, both
the bearing seat and cap are marked with number respectively to
prevent them frorrl mixing up in assembly.'
The timing gear case and the flywheel housing are fixed onto
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