6.5
Section 6
Lubrication System
6
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. If no sealant is preapplied, apply pipe sealant
with Tefl on
®
(Loctite
®
592
™
PST
®
Thread Sealant
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.).
4. A ach lead to switch terminal.
Testing the Switch
Compressed air, a pressure regulator, pressure gauge
and a continuity tester are required to test the switch.
Normally Closed 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
2.0/5.0 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 2.0/5.0 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
specifi ed.
Normally Open 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 no continuity (switch open).
2. Gradually increase the pressure to the switch.
As pressure increases through the range of
2.0/5.0 psi, the tester should indicate a change to
continuity (switch closed). The switch should
remain closed as the pressure is increased to
90 psi maximum.
3. Gradually decrease the pressure through the
range of 2.0/5.0 psi. The tester should indicate a
change to no continuity (switch open) down to
0 psi.
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