Oil Pressure Switch

The switch is located on the front cylinder head above the injection pump and governor assembly. It is a nor- mally closed switch and opens with pressure. The oper- ating range for the switch is 2.8 to 5.7 PSI (0.2 to 04 kg/cm2 ).

Testing with the engine off

1.Turn the ignition switch to ON. The oil pressure lamp should be on.

2.If the lamp is not on, disconnect the brown wire from the switch and ground it to the engine block.

3.If the lamp comes on the switch is bad.

4.If the lamp does not come on after step 2, check the indicating circuit (see Indicating and Safety Circuits).

Testing with the engine on

1.If the lamp is on with the engine running, shut off the engine immediately.

2.Disconnect the brown wire from the switch.

3.Turn the ignition switch to ON. The oil pressure lamp should go out.

4.If the light is still on, check for short circuiting in the indication circuit (see Indicating and Safety Circuits).

5.Return ignition switch to OFF and connect the brown wire to the switch.

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Figure 7

1.Oil pressure switch

6.Remove switch and install test gauge in the oil pres- sure switch port.

7.Start the engine and check for a minimum of 30 psi at 1400 RPM. If the engine oil pressure is low, shut off the engine immediately.

8.Shut off the engine and remove the test gauge.

9.If the engine oil pressure is good, replace the switch.

Hour Meter

1.Connect the positive (+) terminal of a 12 VDC source to the positive terminal of the hour meter.

2.Connect the negative (±) terminal of the voltage source to the other terminal of the hour meter.

3.The hour meter should move a 1/10 of an hour in six minutes.

4.Disconnect the voltage source from the hour meter.

Hobbs

 

QUARTZ

1

0 0 0 0 1

10

HOURS

 

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System

Electrical

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Figure 8

Reelmaster 2300±D/2600±D

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Electrical System

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Toro 2600D, 2300-D service manual Oil Pressure Switch, Hour Meter, Testing with the engine off, Testing with the engine on

2600D, 2300-D specifications

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