New Holland B80B, Руководство по обслуживанию

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Engine - Engine and crankcase
Engine - Troubleshooting
NOTE: The following table lists problems and their possible causes with recommended remedial action.
ATTENTION: When attending a repair the cause of the problem must also be investigated and corrected to avoid
repeat failures.
Problem Possible Cause Correction
Engine does not develop
full power Clogged air cleaner Clean or renew element
Fuel line obstructed
Clean
Faulty injectors Clean and reset
Incorrect valve clearance adjustment Clean and reset
Burnt, worn or sticking valves Replace valves with new or oversize,
and/or machine the valve guide bores
Blown head gasket
Check head flatness and fit new gasket
Incorrect fuel delivery Check injectors and pump
Low cylinder compression Renew piston rings or re-bore/re-sleeve as
necessary
Oil pressure warning light
fails to operate Bulb burnt out Renew bulb
Warning Light pressure switch faulty Renew pressure switch
Warning light circuit faulty Check and renew wiring
Excessive exhaust smoke Exhaust leak on exhaust manifold Fit new gasket
Air cleaner dirty or restricted Clean
Excessive fuel delivery Overall injection pump and injectors
Engine knocks Diluted or thin oil Check crankshaft bearings for damage,
change as required. Drain and refill with
specified oil and renew filter.
Ascertain
cause of dilution
Insufficient oil supply Check oil level and top up as necessary.
Overhaul or renew pump as necessary.
Check oil filter is not clogged
Low oil pressure Overhaul pump or relief valve as necessary
Excessive crankshaft end play Replace thrust washer
Excessive connecting rod or main Install new bearing inserts and/or bearing
clearance re-grind crankshaft
Bent or twisted connecting rods Renew connecting rods
Crankshaft journals out of round Re-grind crankshaft and fit undersize bear-
ing inserts
Excessive piston to cylinder Re-bore/re-sleeve block and fit i bore clear-
ance new pistons
Excessive piston ring clearance Fit new pistons and rings
Broken rings Fit new rings, check bore and pistons for
damage
Excessive piston pin clearance Fit new piston or pin
Piston pin retainer loose or missing Install new retainer, and check bore/pistons
for damage
Excessive camshaft play Install new thrust plate
Imperfections on timing gear teeth Renew timing gear
Excessive timing gear backlash Check and adjust backlash /renew, timing
gear
Engine overheats
Coolant hose connection leaking or col-
lapsed Tighten hose connection, renew hose if
damaged
Radiator cap defective or not sealing
Renew radiator cap
Radiator leakage Repair/renew radiator
Improper fan belt adjustment Re-adjust fan belt
Radiator fins restricted Clean with compressed air
Faulty thermostat Renew thermostat
Internal engine leakage Check for source of leakage. Renew gas-
ket or defective parts
Water pump faulty Overhaul water pump
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