Greensmaster 3300/3400 Page 6 -- 39 Electrical System
Backlap Switch
Thebacklap switchisa normallyopenballswitchthatis
inthenormal,openstatewhenthebacklapleverisinthe
mow position. When the backlap lever is in the backlap
position, the switch closes. The backlap switch is at-
tached to the bottom of thehydraulicmowcontrolman-
ifold located under the left side cover next to operator
seat (Fig. 47). The Toro Electronic Controller (TEC)
uses the backlap switch as an input to allow only one
person to backlap the cutting reels and also to prevent
the cutting reels from raising during backlapping.
Testing
1. Park machine on level surface, lower cutting units,
stop engine, apply parking brake and remove key from
ignition switch.
2. Before disconnecting the backlap switch for testing,
the s witch and its circuit wiring should be tested as a
TEC electrical input using the Diagnostic Display (see
DiagnosticDisplayintheTroubleshootingsectionofthis
chapter). If input testing verifies that the backlap switch
and circuit wiring are functioning correctly, no further
switchtestingisnecessary.If,however,inputtestingde-
termines that the backlap switch and circuit wiring are
not functioning correctly, proceed with the following
backlap switch testing procedure.
3. Make sure ignition switch is in the OFF position.
4. Removeleft sidecover nexttooperatorseattoallow
access to hydraulic mow control manifold. Locate the
backlap switch on the bottom of the manifold. Discon-
nect the harness electrical connector from the backlap
switch.
5. Check the continuity of the switch by connecting a
multimeter (ohms setting) across the switch connector
terminals.
6. With the ignition switch in the OFF position, turn the
backlaplever tothebacklapposition whilewatchingthe
multimeter.Continuityshouldbemadeastheswitchclo-
ses.
7. Turn the backlap lever to the mow position while
watchingthemultimeter.Continuityshouldbebrokenas
the switch opens.
8. If backlap switch is faulty, replace switch.
9. If the backlap switch tests correctly and a circuit
problem still exists, check wire harness (see Electrical
Schematicand WireHarness Drawingsin Chapter10 --
Foldout Drawings).
10.After testing is completed, connect harness electri-
calconnectortothebacklapswitch.Installleftsidecover
next to operator seat.
1. Hydraulic mow manifold
2. Backlap lever
3. Backlap switch
4. O--ring
5. Shim
6. Ball
Figure 47
20 ft--lb
(27 N--m)
3
4
5
1
2
6
1. Backlap lever (forward) 2. Backlap lever (backlap)
Figure 48
2
1
Electrical
System
To Next Page
Loading...
