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INSTALLATION
APRIL 2021
32DFR108.C
FR2SS-SERIES SERVICE MANUAL
II. FOLDOVER RAMP INSTALLATION
A. INSTALLATION GUIDELINES
Careful installation of the Ricon FoldOver ramp contributes to proper and safe operation. Use the electrical wir-
ing diagrams in Figures 3-12, 3-13, 3-15
and the hydraulic diagrams in
Figures 3-10 and 3-11 of Chapter III to
supplement this section.
1.
LOCATING MOUNTING BRACKETS ON BUS FRAME
Use a rigid fixture that substitutes for the ramp assembly when positioning ramp mounting brackets on bus
frame. If the ramp assembly is used to position mounting brackets, verify that it is correctly located relative
to the vehicle floor, etc. Accurate positioning of brackets prevents twisting or warping of ramp frame when
installing and tightening mounting hardware. A warped frame may cause the ramp motion to be erratic.
Set height of ramp flooring surface flush to surrounding floor structure to prevent a tripping hazard.
2.
INSTALLING RAMP IN FLOOR
Trim away floor material to allow ramp assembly to drop into floor opening. The ramp perimeter trim over-
laps the floor surface, and is sealed to it with a bead of sealer or a gasket. The typical gap between the
side mounting faces and the bus structure is 1/8 inch; use shims to fill gap. Mount ramp with six grade-5
screws (included in supplied hardware installation kit). Use flat washers and locking-type nuts.
3.
INSTALLING VEHICLE WIRING HARNESS
Route wiring harness from vehicle ramp controls to rear of ramp. Use the supplied electrical installation kit
(Ricon p/n 22985) to connect vehicle control wiring to the ramp interface connector. See
Table 2-1
for pin
layout and signal descriptions.
Table 2-1: J6 PIN LAYOUT AND DESCRIPTION
Pin
Wire color
Description
Volts/amps
A
White
Interlock common
Ground for interlock circuits
B
Red
STOW request from ramp
control switch
12/24 volts, 5mA max draw
C
Orange
Output signal to interlock,
ramp not stowed
12/24 volts, 5A max
D
Black
DEPLOY request from ramp
control switch
12/24 volts, 5mA max draw
E
Brown
Power for optional heater mat
24 volts, 9A max draw
B.
FOLDOVER RAMP ADJUSTMENTS
1.
FLOW CONTROL VALVE PRESSURE SETTING ADJUSTMENT
NOTE:
It is important to adjust both flow control valves
identically
during this procedure.
a. Refer to
Figure 2-5
. Loosen lock nut screws that secure the flow control valve knobs.
FIGURE 2-5: FLOW CONTROL PRESSURE SETTING VALVES
