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5
Checking the Leak Detector
No Parts Required
Understanding the Leak Detector
System
The leak detector system is designed to assist in early
detection of hydraulic-fluid-system leaks. If the fluid
level in the main hydraulic reservoir is lowered by 118
to 177 ml (4 to 6 fl oz), the float switch in the tank
will close. After a 1 second delay, the alarm sounds,
alerting the operator
(Figure
due to normal heating during machine operation,
causes the fluid to transfer into the auxiliary fluid
reservoir. The fluid returns to the main tank when you
turn off the ignition switch.
Figure 13
Before Starting (fluid cold)
1. Filler plug
2. Filler neck
3. Overflow tube
4. Leak-detector tank
15). Expansion of fluid,
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5. Warning buzzer—no
sound
6. Fluid level (cold)
7. Solenoid-return valve
(open)
8. Float switch
(raised—open)
Normal Operation (fluid warm)
1. Fluid level (warm)
2. Solenoid-return valve
(closed)
1. Float switch
(down—closed)
Fluid level down 118
to 177 ml (4 to 6 fl oz)
2. Warning buzzer
Checking the System Operation
1.
With the ignition switch in the O
the leak detector switch rearward and hold. After
the 1-second delay elapses, the alarm should
sound.
2.
Release the leak-detector switch.
7
Figure 14
3. Warning buzzer
4. Float switch
(raised—open)
Figure 15
Leak Alert!
3. Fluid level (warm)
position, move
N
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