Axle Center Switch; Cushion Down Limit Switch; Figure 3-10: Axle Center Switch - Upright SL30SL Service & Parts Manual

4. Elevate the machine until the lower tension mem-
ber clears the limit switch lever. Set the LO
RANGE potentiometer so that the machine will
travel 6.1 m (20 ft.) in 27 to 28 at full controller
deflection.
Note: The machine should be running full speed
before crossing the starting line, and should
run perfectly straight through the course.
5. Repeat the speed trials for verification and read-
just as necessary.
Figure 3-9: Platform Down Relay & Terminal Block
Axle Center Switch (Figure 3-10)
1. Check tires for proper pressure.
2. Place the work platform on a level surface with
the front and rear axles parallel (on the same
plane).
3. Adjust the switch so it is centered in the front axle
actuator linkage. When centered, the switch will
close the circuit.
4. Test the switch function by positioning the front
axle off-center and raising the platform 2.21-2.26
m (87-89 in.) above the ground. The work plat-
form should not drive. Retest with axle off-center
in the other position.
SL26/30SL Work Platform
M
AINTENANCE
Platform Down
Relay "A" Terminal
Small Terminal
Block
Actuator Linkage

Figure 3-10: Axle Center Switch

Cushion Down Limit Switch

(Figure 3-11)
The cushion down limit switch is a mercury switch
that provides power to energize the cushion valve
during the last 30 cm (12 in.) of platform lowering.
1. Raise the platform 30 cm (12 in.) from its' fully
lowered position.
2. Disconnect the wires at the mercury switch and
connect an ohmmeter or continuity tester.
3. Rotate the switch until it just closes. If necessary,
tighten the locknut that mounts the switch.
4. Raise and lower the platform to verify the adjust-
ment.
5. Disconnect ohmmeter and reconnect wires.
6. Lower platform.
Section
3.8
Axle Center
Switch
3-9