Section H.
В
Troubleshooting
Belarus – 510/512 Operating manual
114
Table H-1, continued
TROUBLE, EXTERNAL MANIFESTATION
REMEDY
C. Blue fume is emitted from the exhaust pipe
Ingress of oil into the combustion chamber as a re-
sult of wear of cup-piston group components
Excess of oil in the diesel engine crankcase.
Replace the worn-out parts of the cup-piston group.
Drain the excessive oil, having set the level against
the upper mark of oil-measuring rod.
Engine overheating
Coolant boiling in radiator.
Poor fuel atomization by the injectors.
Clean the radiator from dirt and dust, if necessary,
clean cooling system from scale; adjust the fan belt
tension.
Locate the faulty injectors, wash, clean and adjust
them.
Engine suddenly stops
No fuel delivery.
Check fuel in the fuel tank, check condition of fuel
lines, filter and booster pump.
Oil pressure in warmed-up engine below allowable level
Pressure sensor or indicator failure.
Engine lubrication system pump is faulty.
Oil level in the crankcase is below the allowable
level.
Sticking of the drain valve of centrifugal oil filter.
Maximum wear of crankshaft journal to bearings
junction.
Replace.
Eliminate the failure or replace the pump.
Add oil to the upper mark of the oil dipstick.
Rinse the valve and adjust the pressure.
Send the engine for repair.
POWER GEAR
CLUTCH
Clutch does not transfer full torque
No pedal free travel.
Driven plate linings are worn out.
Adjust pedal free travel.
Replace the linings of the driven plate as an as-
sembly.
Oil on driven plate linings.
Eliminate causes of oil ingress to dry compart-
ment of clutch, if necessary, replace friction lin-
ings or plate assemblies.
Clutch cannot be fully disengaged
Too large pedal free travel.
Adjust pedal free travel.
Misadjusted position of release levers.
Adjust position of release levers as per this Manual.
Oil in dry compartment of clutch housing
Worn cup sealing crankshaft.
Replace cup.
Worn sealings of clutch housing.
Replace sealings.
REAR AXLE FINAL DRIVE
High noise in bevel gear and pinion
Misadjustment of mesh of the final drive pinion
teeth with differential bearings.
Adjust mesh of pinions and clearance in bearings.