New Holland CX720 Repair Manual page 1802

Problem
GREY-WHITE SMOKE
FROM ENGINE
BLUE SMOKE FROM
ENGINE
ENGINE OVERHEATS
ENGINE - Troubleshooting (B.10.A - G.40.A.10)
CX720, CX740, CX760, CX780, CX820, CX840
IMPORTANT: When effecting a repair the cause of the problem must be investigated and corrected to avoid repeat
failures.
Problem
Engine does not develop
full power
POWER PRODUCTION - ENGINE
Possible Cause
Gas exhaust
Leakage on exhaust manifold
Turbocharger
Sound blades
Sound bearings (clearance, etc.)
Waste-gate valve off setting or inefficient
Injector control cams
Wear
Valves
Too much or no clearance
Water in cylinders
Leakage from head gasket
Leakage from injector sheaths
Incoming water from intake system
Water in diesel
Oil in cylinders
Too much oil consumption
Oil blow-by from turbine
Blow-by from valve guide
Coolant level
Under minimum
Fan and water pump drive belt
Not efficient
Water pump
Not efficient
Thermostat
Jammed shut or partially open
Radiator
Clogged outside
Air filter
Clogged
Sleeves close
Cylinder head gasket
Compression blow-by from cylinder head
gasket
Fan
It cuts in late
It slips too much
Possible Cause
Clogged air cleaner
Fuel line obstructed
Faulty injectors
Incorrect valve clearance adjustment
Burnt, worn or sticking valves
Blown head gasket
B.10.A / 256
Check - eliminate
Check
Replace turbocharger
Adjust or replace waste-gate valve and ad-
just
Check, replace
Check, replace
Check water circuit pressurization liquid
level
Check tank cleaning
Check for leaks
Top up to level
Check tension
Replace
Check whether water leaks from drainage
hole
Replace
Replace
Wash or replace
Check filter clogging indicator
Replace filter
Check water circuit pressure
Replace
Replace
Clean or renew element
Clean
Clean and reset
Check and reset
Replace valves with new or oversize,
and/or machine the valve guide bores
Check head flatness and fit new gasket
2 4/7/2006
Correction
Correction