ARB CKMA12 User Manual

ARB AIR LOCKER
Air Operated Locking Differentials
CKMA12 &
CKMA24
On-Board Air Compressor Kit,
High Output
Specs:
ITEM #
QTY
DESCRIPTION
PART #
NOTES
01
1
O-RING (BS010V75)
160242
5
Voltage
12 Volts (CKMA12), 24 Volts (CKMA24)
02
1
MANIFOLD CAP (1/4” NPT)
320214
Current Draw
No-Load
14.2A (CKMA12 only)
03
1
PRESSURE SWITCH (1/4” NPT)
CO35
Load
25.2A (CKMA12 only)
04
2
O-RING (BS031N70)
160241
5
Air Flow
87.2L/min @ 0kPa [3.08CFM @ 0psi]
05
1
MANIFOLD TUBE
320215
65.9L/min @ 200kPa [2.34CFM @ 29psi]
06
2
HEX BOLT (M6 x 60mm)
200703
Total Weight
4.5kg [9.9lbs]
07
1
COMPRESSOR HEAD ASSEMBLY
320102
Size
145mm x 190mm x 98mm (H,L,W)
08
1
SAFETY VALVE POPPET
320205
1
[5.7” x 7.5” x 3.9”]
09
1
SAFETY VALVE SPRING
150115
1
Manifold Port
1
/
4
” NPT [Pressure Switch] x 1
10
1
SAFETY VALVE FITTING
320204
1
1
/
8
” BSPT [Solenoid nipple] x 2
11
1
HEX BOLT (M6 x 125mm)
200704
Pressure Switch
Open
690kPa [100psi]
12
4
HEX BOLT (M6 x 12mm)
200702
Closed
490kPa [70psi]
13
1
MANIFOLD SUPPORT BRACKET
320207
Safety Valve
OPEN @ > ~1250Kpa [180 PSI]
14
#
AIR LOCKER CONTROL SOLENOID (12V)
180103
15
#
NIPPLE (1/8” to 1/8” BSPT)
170501
Notes:
16
#
PUSH-IN FITTING (5mm to 1/8” BSPP)
170201
17
3
O-RING (BS032S70)
160247
5
18
1
VALVE PLATE ASSEMBLY
320105
19
1
BARREL
320201
1
Comes pre-assembled with HEAD ASSY (07).
20
1
PISTON ASSEMBLY (SERVICE KIT)
320302
6
21
1
STICKER, CKM COMPRESSOR
210122
2
Motor voltage is the only difference between
22
1
MOUNT ASSEMBLY
320101
the CKMA12 and the CKMA24 compressors.
23(a)
1
MOTOR ASSEMBLY (12V)
320104
2
Motor is serviceable with replacement brushes
23(b)
1
MOTOR ASSEMBLY (24V)
320106
2
available as #320111.
24
4
HEX BOLT (M6 x 25mm)
200405
*
4
CARRIAGE BOLT (M6 x 25mm)
6151082
3
AIR FILTER BASE (31) & COVER (33) available
25
4
FLAT WASHER (M6)
200709
only in AIR FILTER ASSY #320501 which also
26
1
BACKING PLATE
290603
includes the element.
27
4
NYLON LOCK-NUT (M6)
6151223
28
1
AXLE
320203
4
Wiring loom #180409 suits 12 & 24 volt systems.
*
1
RETAINING RING, DIN7993 RW-14
6151767
29
1
CAP SCREW (M5 x 20mm)
200711
6,7,8
See full wiring diagram attached.
30
1
AIR FILTER FLANGE (1/4” NPT)
320212
31
1
AIR FILTER BASE
320501B
3
5
Complete set of O-ring seals is also available
32
1
AIR FILTER ELEMENT (DISK TYPE)
290503
3
as O-ring Service Kit #320301.
33
1
AIR FILTER COVER
320501A
3
34
1
O-RING (BS029N70)
160250
5,8
6
PISTON ASSEMBLY (20) comes only as a
*
1
WIRING LOOM (CKMA12 & CKMA24)
180409
4
service kit also containing the BARREL (19),
*
1
RELAY (12V,40A)
CO42
AXLE (28), and CAP SCREW (29).
*
1
SWITCH (12V)
180209
*
1
SWITCH COVER (COMPRESSOR)
180212
7
Thread lock must be applied to threads of CAP
*
2
PLUG (1/8” BSPT)
170802
SCREW (29) and then torqued to 10 Nm [7.4ft-lb].
*
2
EYE TERMINAL,10MM (YELLOW)
180702
CAP SCREW (29) should never be re-used
*
1
EYE TERMINAL,10MM (BLUE)
CO44
once it has been fully torqued once.
*
1
FUSE,40A,MAXI TYPE
180703
*
1
MINI BLADE FUSE HOLDER, 5A FUSE
180418
9
8
Pre June 2009 CKMA’s used O-RING 160243 and CAP
*
1
EYE TERMINAL,8MM (RED)
180707
9
SCREW 200708 (M4 x 20mm torque to 6Nm [4.4ft-lb]).
*
1
CABLE JOINER,INSULATED (RED)
180708
9
*
1
INSTALLATION GUIDE,CKMA
2102MA12
9
Only included in the CKMA24
#
Available separately or included with Air Locker kits.
*
Not illustrated in exploded view.

ARB CKMA12 Specifications

General

Voltage	12V
Max Working Pressure	150 PSI
Duty Cycle	50%
Features	Thermal Overload Protection
Max Airflow	2.18 CFM

Summary

CKMA12 & CKMA24 Compressor Specifications

Technical Specifications

Details key operating parameters including voltage, current draw, air flow rates, weight, and dimensions.

Important Notes

Provides critical information on pre-assembly, motor serviceability, air filter availability, and wiring loom compatibility.

CKMA12 & CKMA24 Air Compressor – Overview of Design Features

Design Description

Summarizes the compressor's purpose as a versatile, compact, high-flow air source for ARB Air Locker systems.

Key Features

Highlights the compressor's attributes such as voltage options, compact design, sealed components, and durable construction.

Kit Contents

Lists all items included in the complete compressor kit, such as the assembled unit, wiring loom, and mounting hardware.

Air Compressor Loom – Wiring Diagram

Wiring Diagram Details

Illustrates the complete wiring layout for the compressor, including switch, relay, solenoids, and power connections.