Toro Pro Force 44552 - Engine Speed Control (for Model 44554)

EngineSpeedControl(forModel44554)
g235611
Figure26
1.Enginespeedcontrol2.T ethercontrolbox
Theenginespeedcontrolisapotentiometerlocatedinthetethercontrolbox,
andisusedtocontroltheenginespeed(RPM).
TestingtheEngineSpeedControl
1.Parkthemachineonalevelsurfaceandstoptheengine.
2.Disconnectthebatterynegative(-)cableatthebattery.
3.Removethetethercontrolboxcoveranddisconnectthewireharness
connectorfromtheswitch.Removetheswitchfromthecontrolboxif
necessary.
Note:Beforetakingthesmallresistancereadingswithadigitalmultimeter,
shortthemultimetertestleadstogether.Themeterdisplaysasmall
resistancevalue(usually0.5ohmsorless).Thisresistanceisbecauseofthe
internalresistanceofthemultimeterandtestleads.Subtractthisvaluefrom
themeasuredvalueofthecomponentthatyouaretesting.
4.Useamultimetertomeasuretheresistancebetweenthespeedcontrol
terminalsasfollows:
g235612
Figure27
1.T erminalA(signal)3.TerminalC(power)
2.T erminalB(ground)
A.CheckthattheresistancebetweentheterminalsBandCisapproximately
10,000ohms.Recordthemeasuredresistance.
ElectricalSystem:TestingtheElectricalComponents
Page5–22
ProForce®DebrisBlower
18237SLRevA