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ARB CKMTA24 Twin Motor On-Board Air Compressor 24V for Tire Inflation, Air Lockers, and Air Tools
The ARB CKMTA24 is a high-output twin-motor on-board air compressor operating on 24V DC, delivering 174.4 liters per minute of airflow at zero back-pressure and 131.8 LPM at 200 kPa. Engineered in Australia to handle the harsh demands of 4WD off-road environments, the CKMTA24 features a 100-percent duty cycle, IP55-rated ducted brushless cooling fan, and anodized aluminum cylinders with PTFE carbon fiber impregnated piston seals for long service life and minimal maintenance. Part number CKMTA24 provides the pneumatic supply and electronic control for ARB Air Locker differentials and supports rapid inflation of tires up to 35 inches in diameter. Compatible with an optional 4-liter air tank for running air tools.
Features and Benefits
- 24V DC twin-motor design for high air volume output and quiet operation
- 174.4 LPM (6.16 CFM) free-flow airflow; 131.8 LPM at 29 PSI under load
- 100-percent duty cycle for continuous operation
- IP55-rated brushless ducted cooling fan resists dust and moisture
- Anodized aluminum cylinder bores reduce friction and heat buildup
- PTFE carbon fiber impregnated piston seals for extended service life
- Anodized aluminum heat-sink mounting base dissipates heat
- Integrated pressure cutout switch with relay controls pressure between 135 and 150 PSI
- Thermal overload protection on both motors
- In-loom load protection fuses included
- Two splash-resistant washable high-flow sintered bronze air filters
- Maximum operating pressure: 175 PSI
- All ball-bearing equipped motors for low heat, long life, and quiet operation
- Engineered, built, and individually dyno-tested in Australia
- Fully serviceable in the USA; replacement parts available
- Compatible with optional ARB 4-liter air tank for air tool use
Specifications
| Spec | Detail |
|---|---|
| Part Number | CKMTA24 |
| UPC | 3662845004031 |
| Supply Voltage | 24V DC |
| Current Draw (no load) | 14.2 Amps |
| Current Draw (under load) | 25.2 Amps |
| Air Flow (free) | 174.4 LPM / 6.16 CFM |
| Air Flow at 200 kPa / 29 PSI | 131.8 LPM / 4.65 CFM |
| Max Operating Pressure | 175 PSI |
| Pressure Switch Range | 135 to 150 PSI |
| Duty Cycle | 100 percent |
| Dimensions (H x W x L) | 4.1 x 7.5 x 10.8 inches (105 x 190 x 278 mm) |
| Weight | 19.4 lbs (8.8 kg) |
| Motor Type | Ball bearing, oil-free |
| Tank | Tankless (4L tank optional) |
| Warranty | 2 years |
| Prop 65 | Yes |
What Is Included
- ARB CKMTA24 twin-motor 24V air compressor unit
- Complete wiring harness with relay and in-loom fuses
- Sealed, illuminated automotive-grade dash switch
- Two high-flow sintered bronze washable air filters
- Adjustable mounting bracket
- Air Locker solenoid plug-in terminals
- Installation hardware
Frequently Asked Questions
Do I need the ARB CKMTA24 or CKMTA12 for my vehicle?
The CKMTA24 requires a 24V DC power supply, making it suited for heavy equipment, commercial trucks, and vehicles with 24V electrical systems. Most consumer pickup trucks and SUVs use a 12V electrical system and require the CKMTA12. Verify your vehicle's electrical system voltage before ordering.
Can the ARB CKMTA24 run ARB Air Lockers?
Yes. The CKMTA24 provides both the pneumatic supply and the electronic solenoid control terminals required for ARB Air Locker differentials. However, the optional ARB Air Locker Manifold Kit (part 171503) is required for vehicles with Air Lockers to properly route and control air delivery to each locker.
Can I run air tools with the CKMTA24?
The CKMTA24 produces approximately 3 CFM at 90 PSI, which is sufficient for light air tool use when combined with the optional 4-liter ARB air tank. Without the tank, the compressor delivers continuous airflow but without the reservoir volume needed for high-demand air tools.
How fast will the CKMTA24 inflate a 35-inch tire?
At 174.4 LPM free-flow, the CKMTA24 is one of the highest-volume on-board compressors available in its size class. It can rapidly inflate tires up to 35 inches, with actual inflation time depending on starting pressure, ambient temperature, and final PSI target.
Is the CKMTA24 waterproof?
The cooling fan is rated IP55, which means it is protected against dust ingress and water jets from any direction. The compressor motors are also sealed against moisture and splash, but the unit should not be fully submerged.
Where should I mount the ARB CKMTA24?
The CKMTA24 can be mounted in the engine bay or under the vehicle in a protected location. The anodized heat-sink base and IP55 fan allow engine bay mounting. Avoid mounting in locations with direct standing water exposure.
What is the duty cycle of the CKMTA24?
The CKMTA24 is rated at 100-percent duty cycle, meaning it can operate continuously without requiring a cool-down period. This is a significant advantage over compressors with 50-percent or 33-percent duty cycle ratings that require rest intervals.
Is the ARB CKMTA24 serviceable?
Yes. ARB designs the CKMTA series for full serviceability in the USA. Replacement parts including piston seals, air filters, and motor components are available through authorized ARB dealers.
Installation Instructions
- Select a mounting location in the engine bay or protected under-vehicle area with adequate clearance for the compressor body and air filter access.
- Secure the adjustable mounting bracket to the chosen surface using appropriate hardware for the mounting substrate.
- Mount the compressor to the bracket, ensuring the unit is level and the air outlet points away from heat sources.
- Route the wiring harness from the battery area to the compressor, keeping wires away from moving parts and heat sources. Use provided grommets at all firewall penetrations.
- Connect the relay and in-loom fuse block near the battery as directed in the ARB instructions.
- Connect the positive lead to the battery positive terminal through the included fuse block.
- Connect the negative lead to a clean chassis ground point.
- Route the dash switch wiring through the firewall to the cab. Mount the illuminated switch in a suitable dash or console location.
- If installing Air Lockers, connect solenoid plug-in terminals per the Air Locker manifold installation instructions.
- Attach the included sintered bronze air filters to the compressor air inlets.
- Perform a functional test: activate the compressor, verify pressure builds to the cutout pressure of 135-150 PSI, and check all air connections for leaks.
Prop 65 Warning: This product can expose you to chemicals including lead and other compounds known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
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