Directional/Throttle Potentiometer (R1); Testing The 5K Directional/Throttle Potentiometer R1 - Nilfisk-Advance Adphibian AX 651 Multi EDS Service Manual

5K Directional/Throttle Potentiometer (R1)
Warning!

Testing the 5K Directional/Throttle Potentiometer R1

Note: The potentiometer (pot) doesn't have to be removed from its housing mount to test.
1. See Figure 26. Remove the front Drive Paddle Cover (G) from the Rear Housing (H) held together with four Screws
(I) . Note the cover will have the speed limiting Pot (R2) mounted to it, observe the three wires and separate them
to complete the removal of the cover.
2. See Figure 27. Observe the three wires connected to the R1 pot and disconnect. Note the wire numbers and/or
colors and their terminal connections for reassembly.
3. Test the Pot (R1) using an ohmmeter. The
potentiometer specification is 5K Ohms.
Connect the meter leads to each of the
outside connections (three high and one low,
shown in Figure 27) on the pot. It should
read approximately 5,000 ohms (range
4,500-5,500 ohms).
4. Take the 3 high pot connection test lead and
connect to the middle connection (2 wiper),
then push and pull the rear cover to turn the
shaft in both directions. The readings should
be approximately half the total resistance
(2,500 ohms) toward 5,000 ohms and 2,500
ohms toward 0 ohms. Example "A": total
resistance of pot 4,840 ohms (3 high/1 low)
test connections. Example "B": test middle
connection (2 wiper) and outside rear (1 low)
Forward reading 2,420 ohms to 4,700 ohms,
Reverse 2,420 ohms to 230 ohms.
5. Testing Summary: The above tests are to
show the increase and decrease of the pot
through its working range. If you do not get
similar readings, replace the Potentiometer
(R1).
Disconnect the battery pack before servicing machine.
Figure 26
Form No. 56043116 - Adphibian™/AX 651 Multi EDS/AquaPLUS™ - 67
Figure 27