Weifang 495 - Insufficient Engine Output

3 ). ,The engine~ :emlts dens'e
'black smo.ke . to --- get'hel: with
shrill pounding noise.
.'r-he' :::nozzle - '8ssem bly IS ,'.S tuck
'seri0USly.
4 ).' ,A ,hiss comes 'frODl~~ the in-
·take manifbld (,It can cll.e hea:td
'clearly:~_in the:.engiDe running:.at
idling).
The valve leaks.
'5)~ Engine runs unsteadily ·
The governor is.·,not, so sensi:-
tive.
Adjust valve lash or lap the
valve.
Send it\~o, - ~ ~er:Vl~,e wor~shq,p
f9f· .check apd ~epair.
"3. Insufficient Engine Output
Abnormality &. Cause
1 ') • Insufficient Compression
pressure in cylinders
(l)V'alv.e---spring breaks.·
'(2) Valve lash
f
is too small or
even'·becomes-.to -zero.
(3)The valves leak.
'100
Remedy
¥( 1 ). C,rank _ t.h~ e.ng~ne tQ ~:et the
piston reach its T. D. C., ,and
then replace the spring
(2)Adjust thevalve,lash,
(3)Lap the valves.