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Lift Limit Switch and Pump Start Limit Switch (Fig. 13)
Test the switch by disconnecting the wire connector and
installing a continuity tester or ohm meter across the two
leads of the switch.
Lift Limit Switch
Aerate (machine lowered) Transport (machine raised)
OPEN CLOSED
Pump Start Limit Switch
Aerate (machine lowered) Transport (machine raised)
CLOSED OPEN
2
1
NOTE: For proper operation, the switch must be
Figure 13
screwed all the way in. A damaged pivot shaft or bush-
ings could cause the switch to not open and close
1. Pump start limit switch (blue/red & red/blue wires)
properly. Debris in the switch could also cause it to not
2. Lift limit switch (white & black wires)
open and close properly.
Aerator Start and Stop Switches (Fig. 14)
The aeration start (ENGAGE) switch is normally open
(N.O.) and closes when the button is pushed down. The
aeration stop (DISENGAGE) switch is normally closed
(N.C.) and opens when the button is pushed down.
Test the switch by disconnecting the wires from the
switch terminals and connecting a continuity tester or
ohm meter across the two switch terminals.
1
2
1
2
Figure 14
1. Aeration start switch (pink & orange wires)
2. Aeration stop switch (blue & purple wires)
HydroJect
™
3000 Page 5 - 21 Testing