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INSTALLATION
APRIL 2021
32DFR108.C
FR2SS-SERIES SERVICE MANUAL
b. Turn both valves fully
clockwise
(CW). This completely closes the valves, stopping ramp operation.
c. Open both valves 1/2 turn
counterclockwise
(CCW) from fully closed. Verify that each valve is adjust-
ed identically. Rotating valves
counterclockwise
(CCW) increases flow to the ramp actuator and in-
creases speed/torque; rotating the valves
clockwise
(CW) decreases flow to the actuator and decreas-
es speed/torque. The flow controls can be adjusted to meet customer speed requirements.
NOTE:
The flow controls should not be adjusted so that proper operation is hampered.
d. Tighten lock nut screws.
2.
SENSOR TARGET ADJUSTMENT FOR POSITION AND GAP
a. Refer to
Figure 2-6
. Verify that the ramp is completely stowed. This establishes a reference position
for ramp during target adjustment.
FIGURE 2-6: REFERENCE POSITION FOR RAMP
b. Refer to
Figure 2-7
to verify that target is correctly installed on actuator driveshaft; the small stow seg-
ment points at the actuator and the larger deploy segment is adjacent to the pillow block. The target
must be laterally positioned on driveshaft so that its STOW and DEPLOY segments are aligned with
sensors; each target segment must be directly in front of a sensor. Adjust as necessary.
RSM0008400
DEPLO Y
SEGMEN T
STOW
SEGMEN T
DEPLO Y
SENSOR
SENSOR
LIGHTS
STOW
SENSOR
SENSOR
TARGET
FIGURE 2-7: ORIENTATION OF SENSOR TARGET
c. Refer to
Figure 2-8.
Loosen jam nuts on sensor body. Adjust position of both nuts to achieve a gap
between nose of sensor and outside diameter of target that is .060"
.030" (gap can be set anywhere
on outside diameter of target). Do not allow sensor to contact target. Tighten jam nuts and recheck
gap. Repeat for other sensor.
d. When front edge of ramp is approximately 3-6 inches above vehicle floor, the STOW sensor will be
aligned with the stow segment on the target and the LED on the sensor body will illuminate.
Figure 2-8
shows the position of the STOW segment when the ramp has been fully stowed.
