EM-11
ENGINE MECHANICAL Troubleshooting (Diesel Engine Diagnosis)
EXCESSIVE EXHAUST SMOKE
HINT:
• Check that the air cleaner is not clogged.
• Check with the customer whether or not oil consumption has been excessive.
(Possible Cause)
(Check Procedure and Correction Method)
1. IMPROPER INJECTION TIMING~| 1 Refer to step 7 of ENGINE CRANKS NORMALLY
B ( j T W | L L N Q T S T A R T
HINT: Black smoke indicates advanced timing
while white smoke indicates retarded timing. Adjust-
ments should be made accordingly.
2. CLOGGED FUEL FILTER | 1 Refer to step 5 of LACK OF POWER.
HINT: At high speed (2,000-3,000 rpm), a
clogged filter tends to make exhaust smoke white.
3. FAULTY INJECTION NOZZLES | 1 Refer to step 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
HINT: Excessive exhaust smoke is often caused by
nozzle pressure being too low.
3. INTERCHANGED OVERFLOW
SCREW (OUT) AND INLET (NO
MARK) FITTING
4. FUEL LEAKAGE
5. CLOGGED FUEL FILTER
6. IMPROPER INJECTION TIMING
7. FAULTY INJECTION NOZZLES
1. IMPROPER INJECTION TIMING
2. CLOGGED FUEL FILTER
3. FAULTY INJECTION NOZZLES
HINT: Overflow screw is marked "OUT" and has
an inner jet. Although both fittings are same size,
they must not be interchanged.
Refer to step 3 of ROUGH IDLE WITH WARM EN-
GINE.
Disconnect inlet hose to fuel filter, and feed clean
fuel directly into pump.
HINT: When feeding fuel directly into pump, keep
container at same level as vehicle fuel tank.
If engine condition improves, fuel filter is clogged
and should be replaced. (See page FU-4)
If no increase in engine condition after replacing
fuel filter, check priming pump (hand pump) or per-
form other necessary repairs.
Refer to step 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
Refer to step 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
Refer to step 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
HINT: Black smoke indicates advanced timing
while white smoke indicates retarded timing. Adjust-
ments should be made accordingly.
Refer to step 5 of LACK OF POWER.
HINT: At high speed (2,000-3,000 rpm), a
clogged filter tends to make exhaust smoke white.
Refer to step 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
HINT: Excessive exhaust smoke is often caused by
nozzle pressure being too low.
Summary of Contents for 1HD-T
Page 1: ......
Page 53: ...EM 42 ENGINE MECHANICAL Timing Gears TIMING GEARS COMPONENTS ...
Page 65: ...EM 54 ENGINE MECHANICAL Cylinder Head CYLINDER HEAD COMPONENTS ...
Page 95: ...EM 84 ENGINE MECHANICAL Cylinder Block CYLINDER BLOCK COMPONENTS ...
Page 133: ...TURBOCHARGER SYSTEM Turbocharger TC 9 COMPONENTS ...
Page 145: ...FU 6 FUEL SYSTEM Fuel Heater System FUEL HEATER SYSTEM SYSTEM CIRCUIT ...
Page 166: ...FUEL SYSTEM Injection Pump FU 27 INJECTION PUMP REMOVAL OF INJECTION PUMP ...
Page 169: ...FU 30 FUEL SYSTEM Injection Pump COMPONENTS ...
Page 170: ...FUEL SYSTEM Injection Pump FU 31 COMPONENTS Cont d ...
Page 171: ...FU 32 FUEL SYSTEM Injection Pump COMPONENTS Cont d ...
Page 251: ...LU 4 LUBRICATION SYSTEM Troubleshooting TROUBLESHOOTING ...
Page 255: ...LU 8 LUBRICATION SYSTEM Oil Pump OIL PUMP COMPONENT ...
Page 272: ...ST 4 STARTING SYSTEM Pre Heating System Super Glow Type TIMER CHARACTERISTIC DIAGRAM Cont d ...
Page 282: ...ST 14 STARTING SYSTEM Starting System Circuit STARTING SYSTEM CIRCUIT Cont d ...
Page 340: ...B 1 STANDARD BOLT TORQUE SPECIFICATIONS Page STANDARD BOLT TORQUE SPECIFICATIONS B 2 ...
Page 343: ...C 1 SSTAND SSM Page SST SPECIAL SERVICE TOOLS C 2 SSM SPECIAL SERVICE MATERIALS C 6 ...