32DFR114.A
4 - 8
f.
Refer to
Figure 4-4.
To operate the hydraulic pump in the deploy mode (when the ramp is already
deployed), the stow sensor must be actuated. This can be done by placing a metallic object close
to the stow sensor. A wrench is being used in the figure. Notice that the LED in the base of the
sensor lights when the sensor is actuated.
g.
Press and hold the DEPLOY button on the pendant and adjust the deploy pressure valve setting to
800 psi for either the 59” ramp or the 48” ramp. Loosen the lock nut on the valve and engage the
adjustment screw with a ¼” hex key wrench to adjust. Tighten lock nut after adjustment.
h.
Remove all test equipment and reconnect the two hydraulic actuator hoses to the pump body.
i.
Check hydraulic fluid level, and refill reservoir as required.
j.
Press the STOW button on the pendant to verify that ramp stows.
NOTE:
If ramp does not stow fully, repeat steps c. and d. above. Readjust stow pressure by turning the
stow pressure setting valve 1/8 turn CW until ramp stows
k.
Press the DEPLOY button on the pendant to verify that ramp deploys.
NOTE:
If ramp does not deploy fully, repeat steps e, f, and g. above. Readjust deploy pressure by turning
the deploy pressure setting valve 1/8 turn CW until ramp stows
6.
FLOW CONTROL VALVE ADJUSTMENT
NOTE:
It is important to adjust both flow control valves (C1 and C2)
identically
during this procedure.
a.
Loosen lock screws that secure the valve knobs.
b.
Turn both valves fully CW. This completely closes the valves, stopping ramp operation.
c.
Open both valves 1/2 turn CCW from fully closed. Verify that each valve is adjusted identically.
Rotating valves CCW increases flow to the ramp actuator and increases speed/torque; rotating the
valves CW decreases flow to the actuator and decreases speed/torque.
d.
Tighten lock screws.
FIGURE 4-4: STOW SENSOR ACTUATED WITH A WRENCH
FIGURE 4-3: PRESSURE GAUGE CONNECTED TO DEPLOY PORT
