Kohler Command CV730 User Manual download pdf (Page 112)

6.4

Section 6

Lubrication System

To service the blower housing mounted oil cooler,

clean the outside of the fins with a brush (see Figure

6-7). Remove the two screws holding the cooler unit

to the blower housing. Tilt the cooler downward as

shown in Figure 6-8. Clean the inside of the cooler

with a brush or with compressed air. After cleaning,

reinstall the oil cooler to the blower housing with the

two mounting screws.

Figure 6-9. Oil Sentry™ Location.

On engines not equipped with Oil Sentry

™

the

installation hole is sealed with a 1/8-27 N.P.T.F. pipe

plug.

To install the switch, follow these steps:

1. Apply pipe sealant with Teflon

(Loctite

No.

59241 or equivalent) to the threads of the switch.

2. Install the switch into the tapped hole in the

breather cover. See Figure 6-9.

3. Torque the switch to 4.5 N·m (40 in. lb.).

Testing the Switch

Compressed air, a pressure regulator, pressure gauge

and a continuity tester are required to test the switch.

1. Connect the continuity tester across the blade

terminal and the metal case of the switch. With

0 psi pressure applied to the switch, the tester

should indicate continuity (switch closed).

2. Gradually increase the pressure to the switch. As

pressure increases through the range of

3.0/5.0 psi, the tester should indicate a change to

no continuity (switch open). The switch should

remain open as the pressure is increased to

90 psi maximum.

3. Gradually decrease the pressure through the

range of 3.0/5.0 psi. The tester should indicate a

change to continuity (switch closed) down to

0 psi.

4. Replace the switch if it does not operate as

specified.

Figure 6-8. Cleaning Blower Housing Mounted Oil

Cooler.

Oil Sentry

™

General

Some engines are equipped with an optional Oil

Sentry

™

oil pressure monitor switch. If the oil

pressure drops below an acceptable level, the Oil

Sentry

™

will either shut off the engine or activate a

warning signal, depending on the application.

The pressure switch is designed to break contact as

the oil pressure increases above 3-5 psi, and make

contact as the oil pressure decreases below 3-5 psi.

On stationary or unattended applications (pumps,

generators, etc.), the pressure switch can be used to

ground the ignition module to stop the engine. On

vehicular applications (lawn tractors, mowers, etc.)

the pressure switch can only be used to activate a

“low oil” warning light or signal.

NOTE: Make sure the oil level is checked before each

use and is maintained up to the “FULL”

mark on the dipstick. This includes engines

equipped with Oil Sentry™.

Installation

The Oil Sentry™ pressure switch is installed into the

breather cover. See Figure 6-9.

Oil

Sentry™

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Kohler Command CV730 User Manual Page 112

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