OPERATION AND MAINTENANCE MANUAL - Rotek

5-8 Abnormal Exhaust Smoke
Troubles' and Causes
1. White smoke occurs sometimes ~t engine 1.
starting or low load,: fuel:bums·incoIlJl?letely.
(I)Too much fuel supply.:.
(2)Poor fuel ~t"omization
pressure too low or nozzle assembly danlaged.
(3) Fuel injected too late.
(4)Fuel contains water..
(5)Insufficient co.~pressi9n
pr~ssure.
Remedies .'
-( l)Adjust 'atrl0unt of fuel deliv.ery by fue
injection pump.
fuel" injection (1 YClean - nOzZle
2. Blue smoke due to lubricating oil getting 2.
into cylinder..
.adjust"
. .
;
fuel . 'injecti'or
pressure, check and rep~ir or .replac(
-damaged, nozzle 'assembly.'
(2) Adjust fuel delivery advance to its optimurr
value.
(4) Draln offspbiledfuel arid wash fuel tank~
then replace f\1el with clean reshone.
(5) See section "5-1.4"
(1) OiIlevel in oil sump too high. (1 )Drain excessive lubricating oil.
:(2yv~tve guide WOth oUt badly.
(2)Replac~it.
(3) Piston ring and/or liner worn out ex.~vety. (3}Replace w?m out parts or reset rings..
Rings get stuck or their gaps align each
,.::,~fh~~·:
3. Black smoke occurs sometimes;' at he~vy 3.
load. Fuel supplied too much, and bums ..
incompletely.
(1) Engine overload or its output d~op's' due to. (l)Reduce engine load or remedy engine faults.
fault,s.
(2) Poor fuel.atomization.
(3)Fuel injected too late.
(4)Insufficient air supply.
(5)Too much fuel supply.
{2)Check, repair or'reprace no:zzle assembly.
(3}Adjust fuel'd~liveryadvance'
value.
to its opfitnurr
(4)Check ,and clean ~ir cle~ner and inlet port.
(5)Reduce fuel supply to its :specified·leve-I.
· 62 ·