Toro 04127SL Rev C Service Manual Workman E2050 E2065 Preface Publication

Accelerator Potentiometer Adjustment
The accelerator potentiometer is used as one of the in-
puts for the vehicle controller and is attached to the ped-
al frame under the dash (Fig. 13). A collar with roll pin on
the accelerator pedal shaft positions the accelerator po-
tentiometer lever.
1
4
5
If the accelerator potentiometer is out of adjustment, the
diagnostic light on the dash will flash six (6) times. Addi-
tionally, if vehicle movement is erratic and jerky, poten-
tiometer adjustment and  calibration of the  accelerator
system should be performed.
3
2
Adjustment
1.
Position  vehicle  on  a  level  surface,  turn  On/Off
switch OFF and remove key.
Figure 13
2.
attached to the pedal frame of the machine.
Make sure that accelerator potentiometer is securely
1.
2.
3.
Potentiometer
4.
5.
Roll pin
Set screw (2 used)
Accelerator pedal
Throttle position collar
3.
necessary (see  Accelerator Switch Adjustment in  this
section).
Check accelerator  switch adjustment and  adjust if
4.
Check movement of  the accelerator potentiometer
lever:
1
A.  With the accelerator pedal released, the roll  pin
on the throttle position collar should keep the poten-
tiometer lever from 0.050” to 0.100” (1.3 to 2.5 mm)
from the lower stop on the potentiometer body (Fig-
ure 14).
2
3
B.  With the accelerator pedal fully depressed, the in-
put lever of the potentiometer should not contact the
upper stop on the potentiometer body (Figure 15).
Figure 14
Potentiometer lever (accelerator pedal released)
Potentiometer lower stop
Gap of 0.050” to 0.100” (1.3 to 2.5 mm)
1.
2.
3.
5.
location of collar on accelerator pedal shaft:
If potentiometer lever movement is incorrect, adjust
A.  Loosen two  (2) set  screws that  secure throttle
position collar to throttle  pedal shaft and reposition
collar  to  allow  correct  potentiometer   movement.
Make sure that  there is clearance between  roll pin
and side of potentiometer lever to prevent binding.
3
1
2
B.  Remove set screws one at a time from collar and
apply  Loctite  #242  (or  equivalent)   to  set  screw
threads. Install and tighten set screws to secure col-
lar to accelerator pedal shaft.
C. Recheck potentiometer lever movement.
Figure 15
6.
potentiometer adjustment (see Accelerator System Cal-
ibration in this section).
Calibrate accelerator  system after any  accelerator
1.
2.
3.
Potentiometer lever (accelerator pedal fully depressed)
Potentiometer upper stop
No lever contact with stop
Electrical System (Rev. B)
Workman e2050/e2065
Page 3 – 12
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- 120 pages
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