AHEAD - go to 5
5 - Measure the pressure with cold and idling engine.
STANDARD VALUES
Specification Desc./Quantity
20°C Temperature
1200 rpm
approx. 4.5 bar
Specific tooling
020460Y Scooter diagnosis and tester
YES go to 6 NO go to 12
6 - Let the engine warm up and repeat the check with hot oil.
STANDARD VALUES
Specification Desc./Quantity
80°C Temperature
1200 rpm
approx. 1.5 bar
YES go to 7 NO go to 8
7 - Replace the oil minimum pressure switch.
8 - If pressure lower than 1.3 ÷ 1.5 bar is measured.
AHEAD go to 9
9 - Replace the oil filter and repeat the pressure check with oil at 80°C.
YES go to 10 NO go to 13
10 - The failure was fixed.
It is recommended to respect the suggested number of kilometres covered.
11 - Check and restore the electrical system.
12 - If pressure lower than 4 bar is measured.
AHEAD go to 9
13 - Open the engine crankcase and check the by-pass efficiency.
YES go to 14 NO go to 15
14 - Check whether there is an irregular clearance on the crankshaft:
- axial clearance (see the "Crankcase and crankshaft" chapter)
GP 800 i.e. Engine
ENG - 85
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