Main Power and Glow Relays
The Groundsmaster electrical system includes two
identical relays for current control. The main power and
glow relays are attached to a frame bracket under the
hood next to the hydraulic pump drive shaft (Fig. 36).
Relays can be identified by a tag on the wire harness.
6. Disconnect voltage and test leads from the relay ter-
minals. Replace relay if necessary.
7.
Secure relay to machine and connect machine wire
harness connector to relay.
8.
Lower and secure hood.
The main power relay is used to provide current to the
TEC controller, headlights, power point and optional
electric equipment. When the ignition switch is in the
RUN or START position, the main power relay is ener-
gized.
1
2
The glow relay is used to provide current to the engine
glow plugs when energized by the TEC controller. The
controller controls and monitors the operation of the
glow relay. The glow relay and its circuit wiring should
be tested as a controller output with the Diagnostic Dis-
play before disconnecting and testing the relay (see
Special Tools and Troubleshooting in this chapter).
3
Testing
Figure 36
1.
decks, stop engine, apply parking brake and remove
key from ignition switch.
Park machine on a level surface, lower cutting
1. Pump drive shaft
2. Main power relay
3.
Glow relay
2.
3.
ness connector from the relay. Remove relay from ma-
chine for easier testing.
Open hood to gain access to relay.
Locate relay and disconnect the machine wire har-
30
85
86
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
87
0.5
ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
86
85
87
4.
Verify coil resistance between terminals 85 and 86
with a multimeter (ohms setting) (Fig. 37). Resistance
should be approximately 72 ohms.
30
5.
Connectmultimeter (ohmssetting) leadstorelayter-
Figure 37
minals 30 and 87. Ground terminal 86 and apply +12
VDCtoterminal85.Therelayshouldhavecontinuitybe-
tween terminals 30 and 87 as +12 VDC is applied to ter-
minal 85. The relay should not have continuity between
terminals 30 and 87 as +12 VDC is removed from termi-
nal 85.
Groundsmaster 4300--D
Page 5 -- 33
Electrical System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 4300 D |
| Download File |
|
| Document Type | Catalog |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)