Service Manual

ELECTRICAL
9-9Floating Deck Mid-Size Service Manual
9
Proximity Switch PTO Brake Clutch Assembly
This proximity switch is normally open. The contacts
close when a piece of ferrous metal (iron or steel) is
placed close to the switch, approximately within 1/4”
(.635cm). The switch will open when the metal is moved
away (Fig. 1415).
The PTO clutch contains one fi xed plate, a moveable
plate and an electro magnet. When a minimum of 8 VDC
is applied to the clutch the plates will engage. When
the power is removed, springs pull the plates apart and
engage the brake to the driven plate (Fig. 1416).
To test the electro magnet coil, apply an ohm meter to
the two wire terminals connected to the clutch. A good
clutch coil will read approximately 2.8 ohms.
Take one of the test leads and touch an unpainted
portion of the clutch body, or any good ground. There
should be no continuity (very high number of ohms).
Move the test lead to the other wire terminal and repeat
the test. Again there should be no continuity.
An alternate test is an amperage draw. Normal draw for
this clutch should be 4 amps.
Clutch maintenance includes periodic checking and
adjusting of the air gap between the plates. See clutch
service procedures.
Fig 1415 105-0023x1a
Fig 1416 IMG_8062