Toro Groundsmaster 328-D, Service Manual

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Glow Controller (Groundsmaster 328–D)
The glow controller used on the Groundsmaster 328–D
(diesel engine) is located under the instrument panel.
Note: Refer to Groundsmaster 328–D electrical sche-
matic in Chapter 6 – Electrical System when trouble-
shooting the glow controller circuit.
Controller Operation
1. When the ignition switch is placed in the RUN posi-
tion, the controller energizes the glow plugs and lights
up the glow lamp for approximately 6 seconds.
2. When the ignition switch is held in the START posi-
tion, the glow plugs will energize while the switch is held
in START and the glow lamp will not light.
3. When the ignition switch is released from START to
RUN, the glow plugs will de–energize and the glow lamp
will remain off.
Controller Checks
1. Make sure there is power from the battery.
2. Disconnect electrical connector to the fuel stop sole-
noid to prevent the engine from starting.
3. Place ignition switch in the RUN position. Verify the
following while in the RUN position:
A. Glow indicator lamp is on.
B. Glow relay is energized.
C. Glow plugs are energized.
5. If any of the conditions in Step 3 are not met or power
to terminal 1 exists and any of the other conditions in
Step 4 are not met:
A. Verify continuity of the circuitry from the battery to
the glow relay and glow plugs (see Groundsmaster
328–D electrical schematic in Chapter 6 – Electrical
System).
B. Verify continuity of the circuitry from the battery to
ignition switch, glow controller, glow lamp, glow relay
and ground (see Groundsmaster 328–D electrical
schematic in Chapter 6 – Electrical System).
C. Replace parts as necessary.
6. Connect electrical connector to the fuel stop sole-
noid.
3
2
1
6
4
5
1
3
2
D. Glow indicator lamp goes out and glow plugs de–
Figure 11
energize after approximately 6 seconds.
1. Glow controller end view 3. Side view
2. Top view
4. Place ignition switch in the START position. Verify
the following while in the START position:
A. Glow indicator lamp is out.
B. Glow relay is energized.
C. Glow plugs are energized.
D. Power exists at terminal 1 of the glow controller.
Note: If there is no power to terminal 1 of the glow con-
troller, verify continuity of the circuitry from the ignition
switch to the glow controller and perform Step 4 again
(see Groundsmaster 328–D electrical schematic in
Chapter 6 – Electrical System).
Groundsmaster 300 Series Page 6A – 9 Electrical System (Rev. G)