Engine Oil Change; Cooling System Cleaning; Valve Clearance; Injectors Cleaning And Set-Up - Ruggerini MD150 Utilisation Et Entretien

English
32

• Engine oil change

Let the engine run for a few minutes at minimum RPM then stop it, remove the cap
and drain the oil (figure 18).
- Version with internal oil filter:
- Remove the internal oil filter plug ("1" Fig. 19);
- Take out the filter ("2" figure 19), clean it with a brush and diesel fuel, and then
reassemble it.
The filter must be replaced every 400 hours of operation.
- Version with external oil filter:
- Remove the cartridge (figure 20) by turning it anticlockwise;
- Fill the new cartridge with oil, and then screw it by tightening it manually.
Original Ruggerini cartridges are recommended.
Refit cap (figure 18), fill with oil (figure 21-22) and check oil level (figure 23).
Before restarting, make sure that the oil dipstick and the oil drain and fill plugs have
been correctly fitted back in place to prevent lubricant from spilling out. Original
Ruggerini cartridges are recommended.
CAUTION! Hot oil can cause serious burns.
Do not throw away spent oil and cartridges, but hand them to specialised
waste disposal centres.

• Cooling system cleaning

In the event that the engine runs in a dusty area or that grass, hay, sand etc. are
trapped in it, clean carefully the whole cooling system (fan flywheel, air ducts, cylinder
cooling fins, cylinder heads and oil radiator, where present). Cleaning may be carried
out by blowing compressed air or using diesel fuel periodically: in this case dry with
compressed air (figure 24).
Always use protective goggles when compressed air is used.
Never use solvents with a low flash point to clean the filter element. Such
action could cause an explosion.

• Valve clearance

Set the valve clearance with engine cold during the compression phase and with the
piston at Top Dead Centre. The play must be set at 0.15 mm.

• Injectors cleaning and set-up

Every 300 hours of operation or in case of increase in the grade of smoke at the
exhaust pipe, clean and check the injector settings.

• Partial overhaul

The partial overhaul includes the following operations: valve and seat lapping, injector
and injection pump overhaul, injector projection check, fuel injection spark advance
check, check of the harmful area between head and piston, camshaft and crankshaft
end float check, tightening of bolts.

• General overhaul

The general overhaul includes - in addition to all partial overhaul - the following
procedures: cylinder and piston replacement, seat, guide and valve refacing, crankshaft
replacement or grinding, bench bearing and connecting rod replacement.
The following operations must be carried out at a Ruggerini Service Centre: valve
clearance check, injector clean-up, partial overhaul and general overhaul. The above
maintenance rules must be followed scrupulously. Warranty terminates if maintenance
does not comply with Ruggerini's indications.