Irregular Operation - Bukh DV24 ME Owner's Handbook Manual

OPERATING MANUAL FOR BUKH DV24ME ENGINES
IRREGULAR OPERATION - CAUSES AND REMEDIES
1. Engine does not start
SYMPTOM
Insufficient or very little compression
Insufficient or no pressure from fuel pump
Thermo start out of order
Engine does not reach normal revs
Starter motor turns engine too slowly
2. The engine starts, but stops soon after
The engine starts, but stops soon after
3. The engine does not reach maximum output
Difficult to start
The engine revs. Is reduced considerably
when loaded
Hot engine(smell of heat)
4. The engine knocks
The engine runs unevenly
5. The engine smokes
Black smoke
Blue smoke
Grey smoke
6. Excessive consumption of lubricating oil
Blue smoke
Lub. oil leaks out of crankshaft bearings
7. The engine gets too warm or too cold
Cooling water temperature too high
(smell of heat)
Cooling water temperature too low
8. Insufficient or no lubrication oil pressure
Oil warning lamp lights up. Oil pressure
gauge indicates abnormally low oil pressure
009W0825-R02
CAUSE
Inlet and/or exhaust valves leaking
Inlet and/or exhaust valves sticking
Insufficient rocker arm clearance
Piston rings stuck in grooves or are worn
Valve springs broken or are weak
Air in fuel system or nozzles sticking
No fuel (valve leaking)
Electric supply out of order
Unloaded battery or defective
Loose or corroded connections
Empty fuel tank
Air in fuel system
Nozzle sticking
Fuel filter choked
None or insufficient compression
Fuel supply choked up.
Air/water in fuel system
Governor incorrectly adjusted or something
in the system works sluggishly
Insufficient cooling water supply
Damaged cylinder liner or bearings
Air/water in fuel system
Air inlet filter choked
Insufficient compression
The lube oil passes piston and oil rings an
penetrates into combustion chamber, or
vacuum valve defective
Thermostart valve is leaking
Oil- and piston rings are worn
Piston and cylinder liner highly worn
Defective vacuum valve
Worn oil seal ring
Unsufficient cooling water supply caused
by:defective water pump, choked strainer or
a defective thermostat
Defective thermostat
Insufficient lube oil in the engine
Leakage in lube oil system
Relief valve sticking or spring too weak
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REMEDY
Grind or replace the valves, mill the seats
Grease valve stems with 2/3 gas oil and 1/3
lub. Oil. If necessary clean the valves.
Adjust to 0.25 mm inlet and 0.3 mm
exhaust when engine is cold (turn left)
Replace piston rings
Replace springs
Bleed or renew nozzles
Fill up (renew thermo-start)
Check and/or replace switch and
connections. Chech fuse
Battery to be charged or renewed
Tighten or clean connections
Refill and bleed
Bleed
Replace nozzle
Replace filter element. Clean the tank
See "engine does not start"
Check fuel system thoroughly
Adjust the governor. Check governor
system and correct the error
Stop engine. Check cooling water pump
Check bearings, piston and cylinder, if
necessary replace them
Bleed see "engine does not start"
Clean filter
See "engine does not start"
Replace oil rings and possibly the piston
rings. Clean vacuum valve
Replace
Replace oil- and piston rings, if required
Replace
Replace
Replace
Investigate pump rotor for broken wings or
lost driver screw. Clean strainer. Clean or
replace thermostat
Clean or replace thermostat
Check and refill
Tighten and refill
Clean bore and valve, stretch or replace the
spring