Oil Pressure Check; Crankshaft Oil Seals - VESPA 946 E4 EMEA 2021 Manual

Vespa 946 E4-E5 EMEA-USA-ASIA (2021-)

Oil pressure check

- After removing the flywheel cover as described
in the "Flywheel" chapter, remove the electric con-
nexion of the minimum oil pressure switch and
then remove the switch.
- With the engine idling at 1,750 rpm and the oil
temperature at ~90°C, check that the oil pressure
is between 0.5 - 1.2 atm.
- With the engine idling at 5,000 rpm and the oil
temperature at ~90°C, check that the oil pressure
is between 3.2 - 4.2 atm.
- Remove the appropriate tools once the meas-
urement is complete, refit the oil pressure switch
and washer, tightening it to the specified torque
and fit the flywheel cover.
- If the oil pressure is not within the specified limits,
in the following order, check: the oil filter, the oil
by-pass valve, the oil pump and the crankshaft
seals.
N.B.
THE CHECK MUST BE CARRIED OUT WITH OIL AT THE
CORRECT LEVEL AND WITH AN OIL FILTER IN PROPER
CONDITION.
Characteristic
Oil pressure
Operating pressure
- At 1,750 rpm: (0.5 - 1.2)bar
- At 5,000 rpm: (3.2 - 4.2)bar
Locking torques (N*m)
Minimum oil pressure sensor

Crankshaft oil seals

12 - 14
Engine
ENG - 183