Description
Lift Axle Control Module – LACM Air Line Connections Guide
A. Overview
The Lift Axle Control Module controls airflow to and from the Lift and Load (Ride) bags of an auxiliary axle. There are three main valve types:
B. Mounting
1. Mount the LACM to an adequate flat surface using 1/2″ (M12) or 5/16″ (M8) fasteners.
2. Mount the LACM ONLY with the exhaust vent facing downward. Failure to do so will prevent contaminants from exiting the valve and may cause valve failure.
Mount ONLY with exhaust facing downward
C. Air Connections
All LACM versions have 4 main (plus an optional gauge port) air line connection locations.
1. MAIN SUPPLY
The Main Supply port is the connection to the Supply air reservoir (downstream of the pressure protection valve). IMI Norgren recommends use of a 1/2″ Supply line to ensure adequate airflow
Connect the Main supply to the axle’s air reservoir, downstream of the PPV.
2. PILOT PORT (Control port)
The Pilot port is the connection to the auxiliary axle regulated pilot. The pilot port is connected downstream of the auxiliary axle regulator. IMI Norgren recommends use of a 1/4″ Pilot line. The Pilot is connected to the inlet per Section A above. (Normally Closed Solenoid shown)
Connect the pilot port to the axle’s Load Bag Regulator.
3. LOAD DELIVERY PORTS (2 per valve)
The Load delivery ports are the connection from the LACM to the Load (Ride) Bags. One port is connected to each Load bag. IMI Norgren recommends use of 1/2″ Load delivery lines to ensure adequate airflow
Connect the Load Delivery ports to the axle’s Load bags.
4. LIFT DELIVERY PORTS (2 per valve)
The Lift delivery ports are the connection from the LACM to the Lift bags. One port is connected to each Lift bag. IMI Norgren recommends use of 3/8″ Lift delivery lines to ensure adequate airflow
Connect the Lift delivery ports to the axle’s Lift bags.
5. (OPTIONAL) GAUGE PORT
The optional Gauge port is common with the Load delivery ports. This port should be connected to the auxiliary axle’s Load bag air pressure gauge.
Connect the Gauge port to the Load bag pressure gauge.
D. Electrical Connection
Solenoid equipped valves are either polarity sensitive or non-polarity sensitive. This characteristic can be confirmed by the colors of the wires:
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