OPERATING MANUAL FOR BUKH DV36RME LIFEBOAT ENGINES
009W4326-R08
- 15 -
IRREGULAR OPERATION - CAUSES AND REMEDIES
1. Engine does not start
SYMPTOM CAUSE
REMEDY
Insufficient or very little compression
Inlet and/or exhaust valves leaking
Grind or replace the valves, mill the seats
Inlet and/or exhaust valves sticking
Grease valve stems with 2/3 gas oil and 1/3
lub. Oil. If necessary clean the valves.
Insufficient rocker arm clearance
Adjust to 0.25 mm inlet and 0.3 mm exhaust
when engine is cold (turn left)
Piston rings stuck in grooves or are worn
Replace piston rings
Valve springs broken or are weak
Replace springs
Insufficient or no pressure from fuel pump
Air in fuel system or nozzles sticking
Bleed or renew nozzles
Thermo start out of order
No fuel (valve leaking)
Fill up (renew thermo-start)
Electric supply out of order
Check and/or replace switch and connections.
Chech fuse
Engine does not reach normal revs
Unloaded battery or defective
Battery to be charged or renewed
Starter motor turns engine too slowly
Loose or corroded connections
Tighten or clean connections
2. The engine starts, but stops soon after
The engine starts, but stops soon after
Empty fuel tank
Refill and bleed
Air in fuel system
Bleed
Nozzle sticking
Replace nozzle
Fuel filter choked
Replace filter element. Clean the tank
3. The engine does not reach maximum output
Difficult to start
None or insufficient compression
See ”engine does not start”
The engine revs. Is reduced considerably
when loaded
Fuel supply choked up.
Air/water in fuel system
Check fuel system thoroughly
Governor incorrectly adjusted or
something in the system works sluggishly
Adjust the governor. Check governor system
and correct the error
Hot engine(smell of heat)
Insufficient cooling water supply
Stop engine. Check cooling water pump
Damaged cylinder liner or bearings
Check bearings, piston and cylinder, if
necessary replace them
4. The engine knocks
The engine runs unevenly
Air/water in fuel system
Bleed see ”engine does not start”
5. The engine smokes
Black smoke
Air inlet filter choked
Clean filter
Insufficient compression
See ”engine does not start”
Blue smoke
The lube oil passes piston and oil rings an
penetrates into combustion chamber, or
vacuum valve defective
Replace oil rings and possibly the piston rings.
Clean vacuum valve
Grey smoke
Thermostart valve is leaking
Replace
6. Excessive consumption of lubricating oil
Blue smoke
Oil- and piston rings are worn
Replace oil- and piston rings, if required
Piston and cylinder liner highly worn
Replace
Defective vacuum valve
Replace
Lub. oil leaks out of crankshaft bearings
Worn oil seal ring
Replace
7. The engine gets too warm or too cold
Cooling water temperature too high
(smell of heat)
Unsufficient cooling water supply caused
by:defective water pump, choked strainer
or a defective thermostat
Investigate pump rotor for broken wings or lost
driver screw. Clean strainer. Clean or replace
thermostat
Cooling water temperature too low
Defective thermostat
Clean or replace thermostat
8. Insufficient or no lubrication oil pressure
Oil warning lamp lights up. Oil pressure
gauge indicates abnormally low oil pressure
Insufficient lube oil in the engine
Check and refill
Leakage in lube oil system
Tighten and refill
Relief valve sticking or spring too weak
Clean bore and valve, stretch or replace the
spring
