1
inimum oil pressure warning light on with hot engine.
GO- to 2
2
-
Remove the minimum pressure switch electric connector.
Check that the warning light turns off.
YES go to 3 NO go to 11
3
heck the actual oil pressure.
GO - to 4
4 -
Remove the switch and install the
specific tool with the relevant gasket.
Specific equipment and tools:
Manometer 020193Y
Manometer union 020434Y
- Remove the bar with the oil loading cap
and
insert a cap with the temperature probe
supplied with the specific tool.
Insert the probe to feel contact with the
case bottom and pull back a few
millimetres.
Specific equipment and tools:
Multimeter with temperature
probe 020331Y
GO - to 5
5
-Measure pressure with cold and idling engine.
Standard values:
20
degree
Temperature
~ 4,5 bar
1400 rpm
NOTE:
RPM can be measured both by the exhaust gas analyser and by the diagnostic tester
YESgo to 6 NO go to 12
6
-nbsp;Let the engine warm up and repeat the check with hot engine.
Standard values:
80
degree
Temperature
~ 1,5 bar
1400 rpm.
YESgo 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.
GO
to 9
9
-Replace the oil filter and repeat the pressure check with oil at 80
degree
.
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 electric system.
12
_If pressure lower than 4 bar is measured.
GO o 9
13
_Remove the flywheel cover and check the by-pass and the cover sealing gasket efficiency
towards the case internal side, as described in the "Flywheel cover" chapter.
YES
o to 14NOgo to 15
14
- Check whether there is an irregular clearance on the driving shaft:
- axial clearance (see the "Crankcase and driving shaft" chapter)
- radial clearance, especially in the direction of the cylinder axis
- clearance according to the direction of rotation with the connecting rod in quadrature
PGO BR-500 ENGINE
P.10-124
Lubrication
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