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5K OHM POTENTIOMETER REPLACEMENT
The speed on the the electric Mini Dumper is controlled
by a 5Kohm potentiometer. This potentiometer provides
a 0~5 VDCinput signal to the motor controller via pin-13.
Reference wiring diagram.
Use the following procedure when installing a replacement
potentiometer. Reference Figure 21.
1. Lift the Mini Dumper and place wooden blocks at the
7. Position the FWD/REV cable (Figure 21
D
) away from
throttle bracket.
Figure 21. 5K Ohm Potentiometer Replacement
5K OHM
POTENTIOMETER
UNSOLDER (3)
B
SPRING
FWD/REV
SPEED
CLEVIS
C
CLIP
A
NUT
BOLT
G
H
FWD/REV
CABLE
THROTTLE
ARM
D
NUT
POTENTIOMETER
E
F
I
MAINTENANCE
8. Remove the two bolts (Figure 21
E
) that secure the
throttle bracket to the frame.
9. Loosen the nut (Figure 21
F
) that secures the
potentiometer to the throttle arm.
10. Slide the throttle arm (Figure 21
G
) off the output shaft
of the potentiometer.
11. Remove the nut that secures the potentiometer to the
throttle bracket (Figure 21
H
).
12. Next, unsolder the
WHITE
,
BLACK
and
BLUE
wires
connected to the potentiometer (Figure 21
I
). Mark
orientation.
13. Solder the
WHITE
,
BLACK
and
BLUE
wires removed
in step 12 back onto the 5K ohm replacement
potentiometer in the same orientation.
14. Install new 5K ohm potentiometer back onto throttle
bracket and secure with retaining nut.
15. Reinstall throttle arm back onto output shaft of
potentiometer. Do not tighten retaining nut at this time.
16. Reconnect the FWD/REV speed cable and associated
hardware back onto throttle bracket.
2. Remove the four screws that secure the control panel
to the frame.
3. Carefully set control panel down.
4. Unhook the clip attached to the FWD/REV speed clevis
(Figure 21Figure 21
A
). Position the clip downward.
5. Next, remove the spring (Figure 21
B
) from the
FWD/REV speed clevis.
6. Remove the FWD/REV speed clevis (Figure 21
C
) from
the throttle arm.
front and rear of the Mini Dumper. Place blocks so that
the ground
the front and rear wheels can rotate freely just above
