Groundsmaster 4000--D/4010--D Page 5 -- 27 Electrical System
Flow Divider and Engine Cooling Fan Switches
The flow divider and engine cooling fan switches are
identical, two (2) position rocker switches that are lo-
cated on the control console (Fig. 29). These s witches
have a normal and a momentary position.
The flow divider switch is used as an input for the
TEC--5002 controller to energize the solenoid valve in
the hydraulic traction manifold. When the flow divider
switch is depressed ( momentary), traction pump hy-
draulic flow is split between the front wheel motors
(approximately45%)andrearaxlemotor(approximate-
ly 55%) to reduce the chance that excessive traction
pump flow goes to a spinning wheel. The flow divider
switch only functions when the machine Hi/Low speed
switch is in the Low speed (4WD) position.
Theenginecoolingfanswitchisusedas aninputforthe
TEC--5002 controller to allow the engine cooling fan to
run in the normal, automatic mode or in the manual, re-
verse (momentary) direction.
Testing
1. Beforedisconnectingtheflowdividerorenginecool-
ingfan switchfortesting,theswitch anditscircuitwiring
shouldbetestedasaTECinputwiththeDiagnosticDis-
play(seeDiagnosticDisplayintheTroubleshootingsec-
tion of this chapter). If the Diagnostic Display verifies
thatswitchandcircuitwiringarefunctioningcorrectly,no
further switch testing is necessary. If, however, the Dis-
playdeterminesthattheswitchandcircuitwiringarenot
functioning correctly, proceed with test.
2. Make sure ignition switch is OFF. Remove key from
ignition switch.
3. Disassemble console arm to gain access to the
switch that is to be tested (seeConsoleArmDisassem-
bly in the Service and Repairs section of Chapter 7 --
Chassis).
4. Disconnect harness electrical connector from the
switch.
5. With the use of a multimeter (ohms setting), the
switch functions may be tested to determine whether
continuityexists betweenthe variousterminalsforeach
position. The switch terminals are marked as shown in
Figure 30. The circuitry of the flow divider and cooling
fan switch is shown in the chart below. Verify continuity
between switch terminals.
SWITCH
POSITION
NORMAL
CIRCUITS
OTHER
CIRCUITS
NORMAL 2+3 5+6
MOMENTARY 2+1 5+4
6. If switch tests correctly and circuit problem still ex-
ists,checkwireharness(seeElectricalSchematicsand
Wire Harness Drawings in Chapter 10 -- Foldout Draw-
ings).
7. After testing is completed, connect wire harness
connector to the switch.
8. Assembleconsolearm(see ConsoleArmAssembly
inthe Serviceand Repairssectionof Chapter7 -- Chas-
sis).
1. Console arm
2. Cooling fan switch
3. Flow divider switch
Figure 29
1
2
3
Figure 30
BACK OF SWITCH
NOTE: Only flow divider and cooling fan switch termi-
nals 1 and 2 are used on Groundsmaster 4000--D and
4010--D machines.
Electrical
System
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