Toro Greensmaster TriFlex 3400 - Kill (Greensmaster 3300) and Start (Greensmaster 3400) Relays

Greensmaster 3300/3400 Page 6 -- 43 Electrical System
Kill (Greensmaster 3300) and Start (Greensmaster 3400) Relays
The Greensmaster TriFlex electrical system includes a
five(5)terminal relayfor currentcontrol. Thekill relayis
used only on Greensmaster 3300 machines. The start
relay is used only on Greensmaster 3400 machines.
Theserelaysarelocatedunder therightsidecovernext
to the operator seat (Fig. 54) and can be identified by a
tag near the relay wire harness connector.
When energized by the TEC controller, the kill relay on
Greensmaster 3300 machines provides a grounding
path for the engine starter solenoid. While energized,
the kill relay also allows the engine magneto (ignition)
system tofunction.When the kill relayis de--energized,
agroundingpathis madefortheenginemagnetoarma-
tures to prevent ignition function and stop the engine.
The start relay on Greensmaster 3400 machines pro-
vides electrical current to the engine starter solenoid
when energized by the TEC controller.
Testing
1. Park machineon alevel surface,lower cuttingunits,
stop engine, apply parking brake and remove key from
ignitionswitch.Removerightsidecovernexttooperator
seat to allow access to relays.
2. Locate relay to be tested and disconnect the ma-
chine wire harness connector from the relay. Remove
relay from bracket for easier testing.
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
0.5 ohms or less). This resistance is due to the internal
resistanceofthemeter andtestleads.Subtractthis val-
ue from the measured value of the relay being testing.
3. Using a multimeter (ohms setting), measure c oil re-
sistancebetweenterminals 85and 86 (Fig.55). Resist-
ance should be between 70 and 90 ohms.
4. Connectmultimeter(ohmssetting)leadstorelayter-
minals 30 and 87. Ground terminal 86 and apply + 12
VDC to terminal 85. The relay terminals 30 and 87
shouldhavecontinuityas+12VDCisappliedtoterminal
85.Therelayterminals30and87shouldnothaveconti-
nuity as +12 VDC is removed from terminal 85.
5. Disconnect voltage from terminal85 and multimeter
lead from terminal 87.
6. Connectmultimeter(ohmssetting)leadstorelayter-
minals 30 and 87A. With terminal 86 grounded, apply
+12VDCtoterminal85.Therelayterminals30and87A
shouldnot havecontinuity as+12 VDCis appliedto ter-
minal 85. The relay terminals 30 and 87A should have
continuity as +12 VDC is removed from terminal 85.
7. Whenrelay testingis completed,disconnectvoltage
and multimeter leads from the relay terminals. Replace
relay if necessary.
8. Secure relay to machine and connect machine wire
harness connector to r elay.
9. Install right side cover next to operator seat.
1. Relay(4terminal) 2. Relay(5terminal)
Figure 54
2
1
Figure 55
86
85
87A 87
30
2
1
3
4
1. Coil terminal
2. Common terminal
3. Normally closed term.
4. Normally open term.
1
Electrical
System