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3. Troubleshooting
Starting failure
Insufficient
engine output
Poor
exhaust
color
Hunting
Lubricating oil
Cooling
water
Air
intake
Engine starts
but stops
soon.
Exhaust
color
During
work
Exhaust
smoke
Trouble symptom
Cause
Engi
ne do
es n
ot start.
None
Little
Much
Ordinary
Wh
ite
Black
Wh
ite
Black
High knocking sound during
combustion
Abnorm
al en
gi
ne sou
nd
Uneve
n comb
u
stion sou
nd
Durin
g idl
ing
Durin
g work
Larg
e eng
ine v
ibratio
n
Difficulty in ret
urnin
g to low s
pee
d
Excessive fue
l consum
ption
Excessive consumption
Diluti
on by fue
l oil
Mixture with w
ater
Low L.O. pressure
Much bl
ow-by
gas
Overheat
Low wat
er temperatur
e
Pressure dr
op
Pressure rise
Exhaust tempe
rature rise
Corrective action
Clogged air filter
Clean. (See 2.2.4 in Chapter2.)
Engine used at high temperatures or at high altitude
Study output drop and load matching.
Clogged
exhaust
pipe
Clean.
Air/Exhaust Ga
s System
Starting motor defect
.)
Repair or replace. (See Chapter8
Alternator defect
.)
Repair or replace. (See Chapter9
Open-circuit in wiring
Repair.
(See
Chapter10.)
Battery voltage drop
Inspect and change the battery. (See 2.2.3 in Chapter2.)
Electrical Syst
em
56
Summary of Contents for 3TNV Series
Page 1: ...4TNV106 4TNV106T 4TNV94L 4TNV98 4TNV98T 3TNV82A 3TNV84 T 4TNV84 T 3TNV88 4TNV88 ...
Page 31: ...1 General 1 4 Engine External Views 16 ...
Page 32: ...1 General 1 5 Structural Description 17 ...
Page 156: ...9 Starting Motor 9 1 2 Components 141 ...
Page 157: ...9 Starting Motor 9 1 3 Troubleshooting 142 ...
Page 172: ...9 Starting Motor 9 2 3 Troubleshooting 157 ...
Page 175: ...9 Starting Motor 2 Removal of magnetic switch Remove the M6 bolts 10mm 2 160 ...
Page 185: ...9 Starting Motor 3 Brush 1 Check wear of the brush and the brush spring force 170 ...
Page 194: ...10 Alternator 179 10 1 6 Troubleshooting ...
Page 195: ...11 Electric Wiring 180 11 ELECTRIC WIRING 11 1 Electric Wiring Diagram ...
Page 213: ......