Toro WorkmanR e2050, Service Manual

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Workman e2050/e2065
Page 3 – 12
Electrical System (Rev. B)
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.
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.
Adjustment
1. Position vehicle on a level surface, turn On/Off
switch OFF and remove key.
2. Make sure that accelerator potentiometer is securely
attached to the pedal frame of the machine.
3. Check accelerator switch adjustment and adjust if
necessary (see Accelerator Switch Adjustment in this
section).
4. Check movement of the accelerator potentiometer
lever:
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).
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).
5. If potentiometer lever movement is incorrect, adjust
location of collar on accelerator pedal shaft:
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.
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.
6. Calibrate accelerator system after any accelerator
potentiometer adjustment (see Accelerator System Cal-
ibration in this section).
1. Potentiometer
2. Accelerator pedal
3. Throttle position collar
4. Roll pin
5. Set screw (2 used)
Figure 13
3
1
4
2
5
1. Potentiometer lever (accelerator pedal released)
2. Potentiometer lower stop
3. Gap of 0.050” to 0.100” (1.3 to 2.5 mm)
Figure 14
2
1
3
1. Potentiometer lever (accelerator pedal fully depressed)
2. Potentiometer upper stop
3. No lever contact with stop
Figure 15
1
2
3