Fayat Group Bomag BW 138 AD-5 Operating Instruction, Maintenance Instruction page 218

Troubleshooting – Engine faults
Fault
Excessive
exhaust
smoke
Engine over-
heating,
engine must
be shut down
immediately!
218
Possible cause
Moving parts overheating
because of a lack of lubrica-
tion
Engine oil level too high
Insufficient fuel quality
Air filter dirty
Injection valve defective
Cooling fins on radiator are
extremely dirty (the warning
lamp for engine oil tempera-
ture lights)
Engine oil level too low
Lack of coolant
Anti-freeze concentration too
high
Air filter dirty
Thermostat defective
Interior parts of radiator cor-
roded
Insufficient cooling air supply
to the cooling fan
Fan, radiator or radiator cap
defective
Remedy
Check the engine oil level,
correct if necessary
Check the engine oil filter,
replace if necessary
Check the lubrication system
Check, drain off if necessary
Use specified fuel
Clean, replace if necessary
Have examined by a spe-
cialist
Clean the cooling fins
Check, fill up if necessary
Check all pipes and hoses for
good condition and leak tight-
ness
Check the coolant level, top
up if necessary
Do not use radiator sealant to
seal leaks
Use coolant with the speci-
fied mixing ratio
Clean, replace if necessary
Check the thermostat,
replace if necessary
Clean or replace the radiator
Remove any clogging from
the cooling air duct
Have examined by a spe-
cialist
BW 138 AD-5