Removing The R1 5K Potentiometer; Installing And Adjusting The R1 5K Potentiometer - Nilfisk-Advance Adphibian AX 651 Multi EDS Service Manual

Removing the R1 5K Potentiometer

1. See Figure 28. Loosen the pot shaft anchor nut and spin it
to the end of the shaft.
2. Back out the Screw (J) from the pot Fork (K).
3. Maneuver the pot (R1) out from its mounting bracket hole
and separate the Fork (K) from the shaft end.
4. Finish removing the anchor nut from the end of the pot, then
remove the pot completely from the handle mount.
5. To reinstall a potentiometer, see the following Installing and
Adjusting the R1 5K Potentiometer section below.

Installing and Adjusting the R1 5K Potentiometer

Warning!
The potentiometer adjustment sets the drive paddle for neutral
drive motor operation. If the potentiometer is not adjusted
correctly, the machine will not move either forward or reverse
with normal operator input, and the LED display panel will
indicate a speed control system fault
1. See Figure 28. Install the lock washer (on pot side), pot and anchor nut to the handle mount bracket as shown.
Note: Do not completely tighten the anchor nut at this time.
2. Connect ohmmeter leads to the middle terminal (2 wiper) and the (1 low pot) outside terminal. Then preset, turn the
shaft to approximately 2,500 ohms.
3. Install the Fork (K) onto the pot shaft and tighten the Screw (J).
4. Without turning the pot shaft, thread the anchor nut just enough to seat the pot to its mounting bracket.
5. Reconnect the ohmmeter test leads to the pot wiper and low terminal connections, then adjust (turn the pot) to
obtain half of pot's total resistance. This will accurately set the true neutral drive paddle operator position.
6. Tighten the anchor nut securely.
Note: Do not turn the potentiometer shaft when tightening.
7. Reattach all the wiring to both the pots and reinstall the cover.
8. Reconnect the battery connector, turn the key switch on and test the drive system for correct Forward and Reverse
operations.
Note: The covers outside mounted speed limit knob should be turned to the full speed position for testing. If
the display panel shows the 03 fault code, the Potentiometers are either not wired correctly or the R1
pot is not set to its neutral setting.
68 - Form No. 56043116 - Adphibian™/AX 651 Multi EDS/AquaPLUS™
03.
Figure 28