Glow Plug Replacement; Oil Pressure Switch Replacement - Toro Groundsmaster 300 Series Service Manual

Glow Plug Replacement

If a glow plug has been determined to be defective by
failing the glow plug test, it should be replaced.
1. Remove the nut and lead wire.
2. Clean the area around the glow plug to prevent dirt
or grit from falling into the glow plug hole and the cylinder
during replacement.
Oil Pressure Switch Replacement (Fig. 28)
The engine is equipped with an oil pressure switch
which activates a lamp and buzzer on the control panel
if the oil pressure drops below safe levels during opera-
tion. The switch is located on the oil pump at the rear of
the right-hand side of the cylinder block.
The switch and lamp circuit can be tested with a 12 VDC
battery. With the switch removed the warning
lamp should light and buzzer sound when it is connected
in series with the switch and battery. Removing the
switch from the circuit will test the lamp and buzzer only.
If the switch is defective it should be replaced. Use a
small amount of LOCTITE #567 Thread Sealant (or
equivalent) on the switch threads. Be careful to install
the switch carefully so that the sealant will not block the
oil hole in the switch.
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Groundsmaster 300 Series
3. Remove the defective glow plug from its mounting
hole.
4. Install the replacement glow plug. Torque the glow
plug to 11 - 14.5 ft-lb (1.5 - 2 KgM).
5. Reinstall the lead wires and nuts.
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Figure 28
External Engine Component Repair