Coring Head Switch Assembly - Toro Greens Aerator Service Manual

Coring Head Switch Assembly

The coring head switch assembly monitors the position
of the coring head (raised or lowered) for correct aerator
operation. This switch includes two (2) normally open
ball switches, one (1) normally closed ball switch, a
spring loaded plunger and a housing (Fig. 13).
The plunger in the switch assembly is extended when
the coring head is lowered. In this position, the switches
are in their normal states (two are open and one is
closed).
The plunger in the switch assembly is pushed in when
the coring head is raised. In this position, the switches
are not in their normal states (two are closed and one
is open).
The adjustment procedure for the coring head switch
assembly is included in Operator's Manual.
Testing
The switch can be tested for continuity at the wire har-
ness connector as shown in Figure 14.
When the switch plunger is extended, continuity should
exist across harness connector terminals B and C. Con-
tinuity should not exist between any other connector ter -
minals.
When the switch plunger is pushed in, continuity should
exist across harness connector terminals A and B and
also between terminals C and D. Continuity should not
exist between any other connector terminals.
If necessary, switch testing can be done at the switch
terminals
Greens Aerator
11
1. Coring Head Switch
2. Self tapping screw
3. Adjustment screw
4. Jam nut
5. Seal
6. Switch harness
1
2
4
1. Switch housing
2. Switch: normally open
HARNESS
CONNECTOR
ORANGE
PURPLE
A B
D C
BLACK
YELLOW
Page 5 – 11
1
3
4
5
7
8
9
10
Figure 12
7. Switch actuator
8. Lock washer (2 used)
9. Screw (2 used)
10. Screw (2 used)
11. Flange nut (2 used)
3
Figure 13
3. Switch: normally closed
4. Switch plunger
#1 SWITCH
(NORMALLY
PURPLE
#2 SWITCH
(NORMALLY
.
CLOSED)
BLACK
Figure 14
Electrical System
2
6
2
OPEN)
#3 SWITCH
(NORMALLY
OPEN)