PIAGGIO 2005 XEVO 400ie, Руководство по ремонту

Страница: 165 / 376

- Check the oil pump as described in the following pages.
- Check that the cooling nozzle and the timing system feeding jet are properly installed.
- Visually inspect the crankshaft couplings and their size ("Crankcase and crankshaft" chapter).
N.B.
POTENTIAL IRREGULARITIES IN COUPLINGS AND THE TIMING SYSTEM COMPONENTS CAN-
NOT BE DETECTED WHEN INSPECTING THE LUBRICATION PRESSURE. THEY MAY BECOME
EVIDENT BY AN INCREASE IN NOISE.
N.B.
IN CASE OF IRREGULAR PRESSURE ON THE CRANKCASE, CARRY OUT A VISUAL AND DI-
MENSIONAL INSPECTION OF THE TIMING SYSTEM COMPONENTS (SEE "THERMAL GROUP
AND TIMING SYSTEM" CHAPTER).
Oil pressure check
1 - In case of oil leaks from the oil filter or from the flywheel cover coupling gasket, check the lubrication
pressure.
AHEAD go to 2
2 - Install the special tool.
Specific tooling
020193Y Oil pressure check gauge
020434Y Oil pressure check fitting
AHEAD go to 3
3 - Check the system pressure with cold engine and medium - high speed.
Standard pressure < 6 bar
YES go to 4 NO go to 5
4 - Replace the damaged components.
5 - Check the working order of the adjustment by-pass (see "flywheel cover" chapter) and restore proper
sliding.
N.B.
STANDARD PRESSURES ARE OBTAINED USING OIL WITH THE PRESCRIBED VISCOSITY. A
HIGHER VISCOSITY CAUSES AN INCREASE OF THE SYSTEM PRESSURE.
1 - If oil consumption is above 250 g/1000 km on a run-in engine, proceed as follows.
AHEAD go to 2
2 - Check the presence of oil in the scavenge duct on the filter box.
YES go to 3 NO go to 4
3 - Check the one-way reed valve and the decantation chamber drainage hole.
YES go to 5 NO go to 4
4 - Check the thermal group seals (piston rings, valve guides and oil guards), see "Thermal group and
Timing system" chapter.
5 - Restore the valve or the drainage hole efficiency.
XEVO 400ie
Engine
ENG - 165