Toro Multi Pro 1200 - Page 81

Multi Pro 1200/1250
Page 5 -- 9
Electrical System
Start, Neutral Engine Speed Lock, Spray Pump Clutch, Boom Actuator and Spray Valve
Relays
Thestart, neutralenginespeedlock,spray pumpclutch
andboomactuatorrelaysareusedonboththeMultiPro
1200 and Multi Pro 1250. The Multi Pro 1250 uses an
additionalthree(3)relaysforthesprayvalvesystem.All
oftherelaysarelocatedundertheoperatorseat(Fig.9).
Therelaysareallidenticalandcanbeidentifiedbyatag
at the relay wire harness connector.
Testing
1. Park machine on a level surface, stop engine, en-
gage parking brake and remove key from ignition
switch.
2. Raiseoperatorseatandlocatetherelaytobetested.
Disconnect wire harness connector from relay and re-
move relay from panel.
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
resistanceof themeter andtestleads.Subtract thisval-
uefromfrom themeasuredvalue ofthecomponentyou
are testing.
3. Using a multimeter (ohms setting), measure coil re-
sistancebetweenterminals 85 and 86 (Fig. 10). 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 terminal 85 and multimeter
lead from terminal 87.
6. Connectmultimeter(ohmssetting)leadstorelayter-
minals 30 and 87A. With terminal 86 grounded, apply
+12VDCtoterminal85.Therelayterminals30and87A
shouldnothave continuity as +12 VDCisappliedtoter-
minal 85. The relay terminals 30 and 87A should have
continuity as +12 VDC is removed from terminal 85.
7. When testing is completed, disconnect voltage and
multimeterleadsfromtherelayterminals.Replacerelay
if necessary.
8. Securerelaytomachinepanelandconnectw irehar-
ness to relay. Lower operator seat.
1. Operator seat (raised) 2. Relay location
Figure 9
1
2
Figure 10
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