Reverse-A-Matic™ RM70 Operation & Installation Manual
Reverse-a-Matic
™ Wheel Direction Sensor System 3 Preliminary Copy – Sept 12 2012,
© 2012 Wheel Monitor Inc. 1-905-641-0024
REVERSE-A-MATIC™ RM70
Mounting Instructions
The
R-A-M
unit an installation kit consists of a sensor
block, sensor, barrel clip, mounting screws, an a
control mo ule. The control mo ule must be
connecte to the sensor. The control mo ule wiring
must be connecte to the constant power blue wire,
the white groun wire.
Mounting of the
R-A-M
system may require wel ing
the sensor block to the axle, rilling holes for the
control unit, sol ering an running wires to the steer
axle solenoi an to a backup alarm an /or lights.
Sensor Mounting
1. The
R-A-M
irectional sensor must be mounte on
the left si e of the trailer ( river’s si e).
2. Do not mount the
R-A-M
sensor on a lift axle.
3. The
R-A-M
sensor shoul be mounte on one of the
two tan em axles. The axle must have an ABS
brake exciter ring (forwar axle preferre ). The
block fits 7.05” or 7.64” Diameter rings.
4. Disconnect the 7 pin plug (J-560 Connector) from
the tractor. Remove the tires an brake rum from
the hub following proper safety proce ures an
wear safety glasses.
5. Select a spot on the axle to wel the sensor block
near the exciter ring so there is sufficient room to
mount the sensor into the block from behin .
6. Locate the sensor block near the ABS exciter ring.
It shoul be at least 45 egrees away from an ABS
sensor if present on that axle.
7. The sensor hole must be in line with the center of
the exciter ring teeth. The block will fit ifferent
heights, if it is too high or too low then turn the
block over an recheck the alignment.
8. The block must be parallel to the ring an
approximately 0.125 inches away. Insert a fiber
spacer between the block an the ring for the
correct spacing uring wel ing.
9. Clamp the block in place for wel ing. NOTE: The
barrel clip an sensor shoul not be in the block
when wel ing.
10. NOTE: Do not connect the ground terminal of the
welder to the hub, this may cause the welding
current to pass through the wheel bearing and
damage it. Connect the ground terminal to the axle
near the work. (Take special care not to splatter
weld or touch the ABS exciter ring with the welder.
Use a weld blanket or suitable cover shield.)
11. Wel the sensor block to the axle housing. Make
sure it is parallel to the exciter ring.
12. The Block must be protecte from corrosion. Apply
some anti-seize compoun insi e the sensor
mounting hole.
13. Gently push the barrel clip into the block from the
rear until the tabs touch the block. The barrel clip
must be installe with the tabs on the inboar si e
of the sensor block.
14. Gently push the sensor into the sensor clip from
the rear. The tab on the sensor must be
pointing away from the center of the axle.
15. Push sensor bo y forwar towar the ABS exciter
ring. The gap between the teeth on the ring an
sensors shoul not excee 0.016 inches (.41mm)
when finishe .
16. Tie wrap the sensor cable safely to the axle, avoi
interference with the operation of the brakes an
ensure the cable is not straine . Run the cable
along the axle an Tie wrap the sensor cables to
the air brake lines every 25 to 30 cm (12 inches).
Module Mounting
17. Install the
R-A-M
mo ule on the insi e of the lower
sli er frame rail or suitable location on the sli er
box. Drill two holes 5/32 iameter an use the
self-tapping screws inclu e or use appropriate
mounting har ware.
18. Connect the sensor to the control mo ule. Make
sure the connectors fit together properly. The
connectors must not be straine or bent.
19. Run wires from the blue wire an white wire of the
trailer’s main harness to the
R-A-M
.
20. A dropout wiring harness is available from Wheel
Monitor for connecting the Blue and White wires to
the trailer’s wiring harness. It has weatherpack
connectors so it can be inserted into the main
harness. It is easy to install and will provide bullet
connectors for the R-A-M module and ground.
PN: WM-DWH-2001 for 1 foot long.
PN: WM-DWH-2012 for 12 foot long.
21. Run wires from a backup alarm an /or an axle
control solenoi to the
R-A-M
mo ule.
22. Run all wires along the airline supply (line ca ie)
to the mo ule.
23. Connect the blue wire to the 12 volt battery supply
wire. Connect the white wire to the groun wire.
(Do not use the chassis for groun . All wires
shoul joine to the main groun wire)
24. Connect the yellow wire to a backup alarm an /or
backup lights.
25. Connect the brown wire to the axle control
solenoi .
26. Connect the BLACK wire to the steer axle pinlock
control solenoi .
27. Connect the GREEN wire to the steer axle pinlock
control solenoi .
28. Note: All connections must be watertight. Wires
not use nee to be shrink wrappe or tape up.
29.The WARNING LABEL included in the it
must be applied to the trailer. This will warn
the operator of the unit an 4-way activation.
Operational Test of R-A-M ™ System
1. Connect the 7 pin plug (J-560 Connector) to the
tractor. Use D.C. power only. Battery chargers
do not supply proper D.C. Power.
2.
ALL R-A-M
outputs will come on for one secon
when the unit is powere up. This is an operational
test to confirm the unit is working.
3. Rotate the wheel hub more than one-sixteenth of a
revolution in reverse (clockwise) an observe that
the Beeper (YELLOW), Lift axle (BROWN)
4. To test the spee control functions requires the
wheel be spinning at more than 65 KPH for nine
revolutions. This can be one using the RAM
Diagnostic tool. This test shoul be performe with
a test light while riving on the roa .
5. Document your results. Install the rum an tires.
We recommen that a light be installe on the si e of
the trailer as an axle status in icator to the river. A
si e marker lamp may be connecte to the
R-A-M
output alrea y connecte to the axle control solenoi .
The other si e of the marker lamp shoul be
connecte to groun wire.
Quic Chec
If all the outputs come on for one secon when the
trailer was powere up, then the
R-A-M
mo ule is
working. Check the sensor alignment. If not check the
power to the unit
Chec Electrical Connections
1. Check that all connections are soun an are ma e
to the correct locations. Ensure the sensor cable
connector is pushe all the way into its mating
connector.
2. Check the input power. Measure the voltage from
blue to white coming from the trailer, It shoul be
aroun 9 to 16 volts D.C.
3. Measure with the meter set to AC, it shoul be very
low. If the trailer is connecte to a battery
charger, there MUST be a goo battery connecte
or the unit will not function correctly.
4.
ALL R-A-M
outputs will come on for one secon
when the unit is powere up. This is an operational
test to confirm the unit is functioning. If they are
coming on ran omly, then the power to the unit
may be intermittent.
5. If one of the backup alarm or the lift axle/steer axle
control is not functioning, then the wiring may not
be correct. Disconnect the output control bullet
an measure the voltage while the unit is re-
teste . The output shoul be 9 to 16 volts D.C. If
it is correct, then the wiring or connections are
incorrect. If the wires are shorte to groun , it will
cause the Reverse-A-Matic’s internal fuse to trip.
Also insure that the backup alarm, lights an
lift/steer axle are functioning properly.
6. If the lift axle/steer axle control is not functioning,
check the air supply to the lift axle an /or to the
pinlock.
Chec Sensor Alignment
7. The sensor may nee to be re-aligne . Check to
make sure the sensor is centere on the ABS
exciter ring. If it is too high or too low then the
sensor will not be able to rea the teeth on the
ring.
8. Sensors can be tightene in the clip by removing
an spray painting the outsi e.
9. Check the Gap between the sensor an the exciter
ring, it shoul be less than 1/32 of an inch
(0.7mm).
10. If the wheel or the bearings have excessive wheel
play, then the sensor may not be able to rea the
teeth on the ABS exciter ring. If so, an inspection
of the wheel bearing shoul be performe .
11. The sensor tab shoul be pointing away from the
center of the axle. If it is not, then rotate it an
check operation of the unit again.
12. If the unit is still not functioning then rotate the
sensor 15 egrees counter clockwise an check
operation of the unit again.
13. If the unit is still not functioning then rotate the
sensor back. Rotate 15 egrees clockwise an
check operation of the unit again. Repeat with 30
egrees of rotation if require .
14. If after following this installation an trouble
shooting gui e, an the unit is still not functioning
properly, please call Wheel Monitor at 1-(905)-
641-0024. Ask for service an we will be please
to assist you further.
Servicing Maintenance
A visual examination of the sensor, the sensor
mounting, all electrical connections an the control
mo ule shoul be performe on the
Reverse-A-Matic
™
system on a regular basis. An operational test of the
unit shoul be performe an ocumente every three
months.
