Internal Oil Filter; Cleaning The Cooling Fins; Valve Clearance; Injector Cleaning And Set-Up - Ruggerini RY70 Usage Et Entretien

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• Internal oil filter

Remove the filter (figure 17-18), clean with diesel and refit. If necessary, top up the
engine oil to the MAX level (figure 3).

• Cleaning the cooling fins

If the engine is working in a dusty environment, clean the fins of the flywheel
periodically with compressed air (figure 21-22), and the fins of the head and cylinder
inserting a brush through the special slots located on the walls (figure 23).
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.

• Injector cleaning and set-up

Every 500 hours of operation, or in case of increase in the grade of smoke at the
exhaust pipe, clean and set the injector to 230 kg/cm².

• 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.
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