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Install Interconnecting Cables
1. Plug transmitter leads into 4-pin pressure transducer output connector(s) and screw tight.
2. Run the 2-wire truck or trailer cable from the three pin transmitter connector into the truck cab or trailer
connector, ensuring protection of the cable from moving parts, road hazards, heat, corrosives, etc.
Provide for a small service loop in the two-wire cable. Do not attach the two-wire cable to air lines.
3. Tie the cable down using heavy-duty cable ties at no more than 18" intervals.
Warning
The stainless steel transmitter is a sealed, encapsulated unit and is not field serviceable. Do not attempt to
weld-on or open the unit or remove the unit's connectors or cable strain relief parts. Opening the unit will void
Rice Lake warranty coverage.
Driver Notes
When positioning a trailer for loading do not hard brake the vehicle, as this could result in torquing of the
suspension and potential scale errors. Softly brake the trailer into loading position then apply the parking brake
once the tractor and trailer brakes are released.
Service Notes
Service Notes
Fittings and Tees (Weatherhead)
Transducer Adapter Thread: 1/4 NPT (female)
1868 X 4 (1/4 NPT Fitting)
Fitting Tightness Torque: Maximum 25 ft/lbs
1868 X 6 (3/8 NPT Fitting)
Pressure Rating: 250 psi (17 bar) per sensor
1868 X 8 (1/2 NPT Fitting)
Output: 0-100 mV
1864 X 4 (1/4 NPT Tee)
Isolation: Greater than 1000 M ohms
1864 X 6 (3/8 NPT Tee)
Pinouts: A=Exc+ B=Sig+ C=Sig(-) D=Exc (-)
1864 X 8 (½ NPT Tee)
Table 4-1. Service Notes
Transmitter Model Numbers
Transmitter Model Numbers
Underside Stamp
Application/Description
RLWS Model
7052
114191
Standard Dual Lead Air Transmitter
7051
114197
Standard Single Lead Air Transmitter
8052
114193
Auto ID System (9705) Dual Lead Air Transmitter
8051
XXXX
Auto ID System (9705) Single Lead Air Transmitter
XXXX
Dual Lead Air Transmitter. Replacement for 9100 system transmitter.
Table 4-2. Transmitter Model Numbers
4.1.2
Slip Spring/Torque Arm Air Suspension
Some air suspensions may not transmit air bag pressure changes as accurately as desired due to mechanical
influences of a slip spring and torque arm linkage. These types of suspensions are less common and used in older
models of truck and trailer manufacturers, but such suspensions may require using other onboard scale solutions,
such as 5th wheel or kingpin plate load cells.
Applications
13