INSTALLATION GUIDE CKMTA12 / 24 Part No.
No liability is assumed for damages resulting in the use of the information contained herein. ARB Air Locker Air Operated Locking Differentials, ARB Air Locker Air Activation System and Air Locker are trademarks of ARB Corporation Limited. Other product names used herein are for identification purposes only and may be trademarks of their respective owners. 12V Model CKMTA12 and 24V Model CKMTA24 is certified compliant to EN 55014.1 (AS/NZS CISPR 14.
1 Introduction 1.1 1.2 2 Pre-Installation Preparation Tool-Kit Recommendations 2 2 2 Installing the Compressor 2.1 2.2 2.3 2.4 2.5 3 Identifying the Best Mounting Position Orientating the Compressor for Best Fit Drilling & Mounting the Compressor Assembling / Installing the Air Filter Using an Air Filter Extension Tube (optional) 3 Connecting the Air System 3.1 10 Compressor Outlet Port Connections 10 4 Mounting & Connecting the Electrical System 4.1 4.2 4.
1 Introduction IMPORTANT : To assure the highest level of planning and reliability goes into this installation, please read this guide in its entirety before attempting any modifications to the vehicle. 1.1 Pre-Installation Preparation Although your ARB Air Compressor comes complete with all the step by step instructions you will need to install your new air source, ARB recommends that you have your ARB Air Compressor installed by a trained professional.
2 Installing the Compressor 2.1 Identifying the Best Mounting Position F Using the following points as guideline, identify a position on the vehicle or inside the cabin where the compressor can be safely and conveniently mounted. NOTE : The ideal position of the compressor should give consideration to all of the following points: 1. The location should allow for quick and easy access to the compressor for attaching an optional pump-up kit air hose for tire re-filling if desired. 2.
2 Installing the Compressor 2.2 Orientating the Compressor Outlet for Best Fit The CKMTA series compressors allow for configuring the outlet port to best suit the installation position and desired position of the outlet hose or coupling (see Fig 1). It is highly recommended to spend some time experimenting with different configurations prior to drilling the four mounting holes. Figure 1. The points and figures below outline how to remove the compressor cover in order to orientate the outlet port.
2 Installing the Compressor F Gently lift the cover upward from under the fan until it is just above the compressor motors. LIFT THIS END OF THE COVER UNTIL IT IS CLEAR OF THE MOTORS Figure 3. CLEARANCE BETWEEN COVER AND COMPRESSOR MOTOR F Slide the cover towards the intake filter end to unhook the cover from the compressor head. F Unplug the connectors from the pressure switch and lift the cover away from the compressor. SLIDE THE COVER TOWARD THE AIR FILTER END Figure 4.
2 Installing the Compressor F Loosen the manifold bolt (10mm socket) and rotate the outlet port to the desired position. Figure 5. ROTATE THE MANIFOLD CAP INTO THE DESIRED POSITION LOOSEN MANIFOLD BOLT F Retighten the manifold bolt (10mm socket) to approximately 9 Nm [6.6 ft-lb]. F Refit the cover reversing the above operations. NOTE : Polarity isn't important when reconnecting the pressure switch connectors. NOTE : Retighten the four cover bolts (10mm socket) to 6 Nm [4.4 ft-lb]. 2.
2 Installing the Compressor Figure 6.
2 Installing the Compressor 2.4 Assembling / Installing the Air Filter F Screw the air filter assembly into the threaded hole in the front of the compressor by hand. NOTE : If an intake extension tube is to be used to relocate the air intake then the extension tube will be screwed into the front of the compressor and the air filter will be screwed into the extension tube (See section 2.7).
2 Installing the Compressor F Assemble an extension tube with a ¼” NPT male fitting at one end and a ¼” NPT female end at the other. F Install the tube inline with the air filter. NOTE : If the extension tube is being used due to the possibility of the compressor being exposed to water then Teflon tape or thread sealant should be used on the threads of the extension tube at the compressor end. F Secure loose sections of the tube and the air filter.
3 Connecting the Air System 3.1 Compressor Outlet Port Connections The CKMTA series compressors can be used for a vast number of compressed air applications including, Air Locker activation, tire inflation and hand air tool operation. Each of these compressed air applications has different requirements of the outlet port connections and some of these setups are outlined below: 3.1.
3 Connecting the Air System 3.1.2 Connection for Tire Inflation If the CKMTA12/24 compressor is to be used for prolonged periods then it is recommended that the compressor be connected using suitable fittings to a separate air tank. This will dissipate the heat from the compressed air and also allow the compressor to run more efficiently. If the compressor is to be used for Air Locker activation and inflating several tires then fitment of the Air Locker Manifold kit mentioned in section 3.1.
4 Mounting & Connecting the Electrical System 4.1 Mounting the Actuator Switch(es) The ARB compressor switch (supplied) and Air Locker actuator switch(es) can be easily panel mounted inside the vehicle in a 21mm x 36.5mm [0.83” x 1.44”] rectangular cutout. NOTE : Air Locker actuator switches described here are supplied with each ARB Air Locker kit and NOT with the ARB compressor kit. If you require switches to complete the installation then contact your ARB Air Locker distributor.
4 Mounting & Connecting the Electrical System 4.2 Wiring the Actuator System Figure 9.
4 Mounting & Connecting the Electrical System When wiring an ARB compressor switch, Air Locker actuator switch(es) and Air Locker solenoid(s), all connections can easily be set up using only the supplied wiring looms (ARB #180414 and 180415 shown in Fig. 9.) F Consulting the wiring diagram (Fig.9.) for wire colors, and the switch terminal illustration (Fig.10.), plug each of the female spade terminals onto their appropriate switch terminal.
4 Mounting & Connecting the Electrical System NOTE : If shortening the BLU-WHT wire, make sure not to remove the heat shrinked inline diode that protects sensitive electronics from current leakage. F Insulate the junction area well with electrical tape. F Route the 4 loose male spade terminals of the long section of loom through any panel work that separates the compressor mount position from the switches (e.g., the firewall separating the cabin from the engine compartment).
4 Mounting & Connecting the Electrical System 4.3 Connecting The Power Wires IMPORTANT : Although the wiring loom in this kit was designed to work with either a 12 volt or 24 volt system, the DC motor of the compressor has been designed ONLY for use on one specific voltage system. Make sure you have the CKMTA12 compressor kit for 12V systems or the CKMTA24 for 24V systems.
4 Mounting & Connecting the Electrical System 4.3.2 Power Connection To A 24V Vehicle / System NOTE : Vehicles equipped with aftermarket ‘dual battery kits’ are not classified as 24V systems. They require the 12 volt compressor kit, and connection to the primary battery only according to section 4.3.1. F Identify which battery in the system will be used as the 24V negative (-) terminal (i.e., Battery #1 in the wiring diagram Fig. 9.
5 Testing & Troubleshooting 5.1 Leak Testing F With the vehicle parked and the engine off, turn the compressor on and wait until the air system is fully charged. F The compressor should not come on again for a period of at least 15min. Air system recharging within that time period would indicate that a leak is present in the system. F If a leak is found to be present, spray a soap and water mixture onto all air fittings in the system while the compressor is fully charged.
5 Testing & Troubleshooting 5.3 Electrical Fault Diagnosis The following describes an effective procedure for tracing an electrical fault in a CKMTA12 or CKMTA24 compressor which has been wired using a genuine ARB wiring loom (refer to the diagram in Figure 9.). All steps must be performed in the order listed here for an accurate assessment.
5 Testing & Troubleshooting STEP # 5 Remove the compressor cover as shown in Section 2.2. Using a multimeter, check for MOTOR VOLTAGE between a chassis ground and the RED wire at each of the relay blocks (i.e., the wire leading directly from the fuse). Was MOTOR VOLTAGE detected? YES Proceed to STEP 6. NO Wiring fault between the fuse and the relay. Replace wiring and/or fuse socket.
5 Testing & Troubleshooting STEP # 12 Using a multimeter, check for MOTOR VOLTAGE between the negative (-) terminal of the battery [#1] and the RED-WHT wire connected to each of the relay blocks and while the relay is still connected. Pierce the RED-WHT wire with the multimeter probe to make connection if necessary. Was MOTOR VOLTAGE detected? YES Proceed to STEP 13. NO Relay fault. Replace with a new 12V - 40A relay of the same type.
5 Testing & Troubleshooting 5.4 Post-Installation Check List Now that the compressor installation has been completed, ARB recommends that you take the time to complete the following check list just to insure that you haven’t missed any of the vital steps. F The air system has been leak tested. F The air filter position will not be exposed to moisture, dust or dirt. F All air lines and wiring have been securely cable tied to resist snagging.
6 Parts List CKMA12 & CKMA24 Air Compressor – Exploded Parts Diagram 23
6 Parts List CKMTA12 & CKMTA24 Air Compressor ITEM # QTY 01(a) 01(b) 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 2 2 1 3 1 2 2 2 1 1 8 1 2 2 2 2 2 4 4 4 1 1 1 1 1 2 1 * * * * * * * * * * DESCRIPTION COMPRESSOR ASSEMBLY (12V) COMPRESSOR ASSEMBLY (24V) TWIN COMPRESSOR MOUNT ASSEMBLY O-RING (BS031N70) COUPLER MANIFOLD FLAT WASHER (M6) HEX BOLT (M6 x 60mm) O-RING (METRIC 6X2 N70) MANIFOLD CAP PRESSURE SWITCH (1/4” NPT) HEX BOLT (M6 x 12mm) COVER ASSEMBLY, CKMT O-RING (BS029N70) AIR FILTER FLANGE (1/4”
