G424 Service Manual Lubrication System109
Oil Pressure Check
Oil Pressure Check
(1) LP pressure switch. (2) Oil pressure switch.
(two-terminals) (one-terminal)
1. With the engine OFF, make sure the oil level is
correct. Connect the analyzer to the engine as
shown in Engine RPM Check in the Testing And
Adjusting.
Before the LP/oil pressure switch is removed, the
engine must be stopped. Make sure oil pressure is
released to prevent personal injury.
2. Remove LP pressure switch (1) or oil pressure
switch (2). Install the pressure gauge in adapter.
3. Start the engine and allow it to warm up to normal
operating temperature.
4. Run the engine at 2000 rpm. Read the pressure
gauge.
5. The oil pressure must be approximately 200 kPa
(29 psi) at 2000 rpm. There is no adjustment to the
oil pressure relief valve.
For the possible cause see Lubrication System
Problems in Troubleshooting.
NOTE: A lower pressure indication, 50 kPa (7 psi), is
normal at low idle speed.
For changing Engine Oil and Filter, See Maintenance
Section
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