Diode Circuit Board
Thecircuitboardcontains fourdiodes (Fig. 48)and islo-
cated under the console housing. The diodes are used
for circuit protection from inductive voltage spikes that
occur when a hydraulic valve solenoid is de--energized.
Diode D1 is in the left cutting deck circuit, D2 is in the
Transport/Mow circuit, D3 is in the front cutting deck cir-
cuit and D4 is in the right cutting deck circuit.
H
G
F
E
D
Testing
C
B
A
The diodes can be individually tested using a digital
multimeter (ohms setting) and the table to the right. If
any of the diodes are faulty, the diode circuit board must
be replaced.
CIRCUIT BOARD
DIODE DIAGRAM
Figure 48
Apply dielectric grease (Toro part number 107--0342) to
circuit board contacts whenever the circuit board is
installed into the wire harness.
Red Lead (+)
on
Terminal
Black Lead (--)
on
Terminal
Continuity
H
A
G
B
F
A
H
B
G
C
F
YES
NO
YES
NO
YES
NO
C
E
D
D
E
YES
NO
Electrical System
Page 5 -- 30
Groundsmaster 4000--D
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
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|
| Document Type | Catalog |
| Language | English |
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