Service and Parts Manual

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  • Introduction

    How to utilise the Air Locker Service and Parts Manual

    1.1 Service & Parts Manual Introduction
    1.2 Air Locker Functional Description


  • Air Locker Differential Parts Lists

    A full parts list for all models of ARB Air Locker. For a complete application reference, please use the Air Locker Application Chart.

    Section Part No. Description Splines Ratio
    2.1 RD01 Toyota 8″, 45mm BRNG (replaced by RD132) 30 All
    2.2 RD02 Toyota 8.9″, 45mm BRNG (replaced by RD142) 30 All
    2.3 RD03 Land Rover, 10 SPL, Banjo (replaced by RD127) 10 3.54
    2.4 RD04 Nissan H233, 31 SPL (replaced by RD134) 31 All
    2.5 RD05 Mitsubishi 8″, RR,28 SPL (replaced by RD210) 28 All
    2.6 RD06 Dana 44,30 SPL, 3.92 & UP (replaced by RD116) 30 3.92 & UP
    2.7 RD07 Dana 44,30 SPL, 3.73 & DN (replaced by RD117) 30 3.73 & DN
    2.8 RD08 Toyota 8.9″, C-clip, 45mm BRNG (replaced by RD153) 30 All
    2.9 RD09 Nissan H233B, 31 SPL (thrust block only – replaced by RD136) 31 All
    2.10 RD10 GM 10 Bolt,8.5″, 28 SPL (replaced by RD83) 28 2.73 & UP
    2.12 RD12 GM 12 Bolt,8.9″, 30 SPL, 3.73 & UP (replaced by RD216) 30 3.73 & UP
    2.16 RD16 Ford 8.8″, 28 SPL (replaced by RD82) 28 All
    2.17 RD17 Nissan H233B, 33 SPL (disc brake only – replaced by RD135) 33 All
    2.18 RD18 Dana 44, 19 SPL, 3.92 & UP (deleted from range) 19 3.92 & UP
    2.19 RD19 Dana 44, 19 SPL, 3.73 & DN (deleted from range) 19 3.73 & DN
    2.20 RD20 Land Rover, Salisbury, 3.54:1 (replaced by RD161) 24 3.54
    2.21 RD21 Dana 60, 30 SPL, 4.56 & UP (replaced by RD162) 30 4.56 & UP
    2.22 RD22 Dana 60, 30 SPL, 4.10 & DN (replaced by RD163) 30 4.10 & DN
    2.23 RD23 Toyota 8″, 50mm BRNG (replaced by RD132) 30 All
    2.24 RD24 Nissan H233B, 33 SPL (replaced by RD135) 33 All
    2.25 RD25 Mitsubishi 9″, RR, 28 SPL (disc brake only – replaced by RD46) 28 All
    2.26 RD26 Land Rover HD, 24 SPL (deleted from range) 24 3.54
    2.27 RD27 Nissan C200, 29 SPL (replaced by RD202) 29 All
    2.28 RD28 GM 10 Bolt, 8.5″, 30 SPL (replaced by RD84) 30 2.73 & UP
    2.30 RD30 Dana 30, 27 SPL, 3.73 & UP (replaced by RD100) 27 3.73 & UP
    2.31 RD31 Dana 30, 27 SPL, 3.54 & DN (replaced by RD101) 27 3.54 & DN
    2.32 RD32 Land Rover, Salisbury, 4.70:1 (replaced by RD160) 24 4.7
    2.33 RD33 Toyota 8.9″, 50mm BRNG (replaced by RD142) 30 All
    2.35 RD35 Dana 60HD, 35 SPL, 4.56 & UP (replaced by RD166) 35 4.56 & UP
    2.36 RD36 Dana 60HD, 35 SPL, 4.10 & DN (replaced by RD167) 35 4.10 & DN
    2.37 RD37 Ford 10.25″ & 10.5″ (Sterling / corporate) (replaced by RD140) 35 All
    2.38 RD38 Dana 35, non C-clip, 27 SPL, 3.31 & DN (replaced by RD103) 27 3.31 & DN
    2.39 RD39 Dana 35, non C-clip, 27 SPL, 3.54 & UP (replaced by RD102) 27 3.54 & UP
    2.40 RD40 GM 14 Bolt, 9.5″, C-clip (replaced by RD197) 33 All
    2.41 RD41 Mitsubishi Jeep, RR (deleted from range) 19 All
    2.42 RD42 Dana 60HD, C-clip, 35 SPL, 4.56 & UP (replaced by RD168) 35 4.56 & UP
    2.43 RD43 Dana 60HD, C-clip, 35 SPL, 4.10 & DN (replaced by RD169) 35 4.10 & DN
    2.44 RD44 Isuzu, RR, 26 SPL (replaced by RD213) 26 All
    2.45 RD45 Mahindra, 19 SPL (deleted from range) 19 All
    2.46 RD46 Mitsubishi 9″, RR, 28 SPL (replaced by RD212) 28 All
    2.47 RD47 AMC Model 20, 2.73:1 (replaced by RD187) 29 2.73
    2.50 RD50 Dana 50, 30 SPL (replaced by RD158) 30 All
    2.51 RD51 GM / AAM 9.25″, 33 SPL (replaced by RD197) 33 All
    2.53 RD53 Dana 70HD, 35 SPL, 4.56 & UP (replaced by RD172) 35 4.56 & UP
    2.54 RD54 Dana 70HD, 35 SPL, 4.10 & DN (replaced by RD173) 35 4.10 & DN
    2.55 RD55B Ford 9″, 31 SPL (replaced by RD119) 31 All
    2.56 RD56 Land Rover, 24 SPL, Banjo (replaced by RD128) 24 All
    2.57 RD57 Land Rover, 24 SPL, Banjo, P38A (replaced by RD138) 24 All
    2.60 RD60 AMC Model 20, 3.08 & UP (replaced by RD186) 29 3.08 & UP
    2.64 RD64 Toyota 9.5″, 32 SPL (replaced by RD152) 32 All
    2.65 RD65 Dana 70U, 35 SPL, 4.56 & UP (replaced by RD172) 35 4.56 & UP
    2.66 RD66 Dana 70U, 35 SPL, 4.10 & DN (replaced by RD173) 35 4.10 & DN
    2.68 RD68 Dana 35, C-clip, 27 SPL, 3.31 & DN (replaced by RD103) 27 3.31 & DN
    2.69 RD69 Dana 35, C-clip, 27 SPL, 3.54 & UP (replaced by RD102) 27 3.54 & UP
    2.70 RD70 Nissan H260, 37 SPL (replaced by RD215) 37 All
    2.71 RD71 Nissan H260, 37 SPL (disc brake only – replaced by RD215) 37 All
    2.72 RD72 Suzuki Sierra, RR, 26 SPL (replaced by RD208) 26 All
    2.73 RD73 Suzuki Sierra, FR, 22 SPL (replaced by RD205)) 22 All
    2.74 RD74 Suzuki Vitara, RR, 26 SPL, 10 Bolt RG (replaced by RD204) 26 All
    2.75 RD75 Suzuki, FR, 22 SPL, 10 Bolt RG (replaced by RD205) 22 All
    2.77 RD77 Suzuki Jimny (JA), FR, 22 SPL (replaced by RD207) 22 All
    2.78 RD78A Nissan H233B, 31 SPL (replaced by RD136) 31 All
    2.79 RD79 Suzuki Vitara, RR, 26 SPL, 12 Bolt RG (replaced by RD209) 26 All
    2.80 RD80 Dana 80, 35 SPL (replaced by RD173) 35 Varies by Mfg.
    2.81 RD81 Ford 8.8″, 31 SPL 31 All
    2.82 RD82 Ford 8.8″, 28 SPL 28 All
    2.83 RD83 GM 8.5″/10 Bolt/AAM 860, 28 SPL (replaced by RD221) 28 2.73 & UP
    2.84 RD84 GM 8.5″/10 Bolt/AAM 860, 30 SPL (replaced by RD222) 30 2.73 & UP
    2.85 RD85 Isuzu RR, 23 SPL, non-LSD (deleted from range) 23 All
    2.87 RD87 Suzuki Jimny, FR, 22 SPL, 8 Bolt RG (replaced by RD207) 22 All
    2.88 RD88 Suzuki, 26 SPL, 10 Bolt RG (replaced by RD208) 26 All
    2.89 RD89 Toyota Tacoma, RR (replaced by RD129) 30 All
    2.90 RD90 Toyota 7.5″ IFS 27 All
    2.91 RD91 Dana 80, 37 SPL (replaced by RD175) 37 Varies by Mfg.
    2.92 RD92 Toyota 8″ IFS, 50mm BRNG (replaced by RD131) 30 All
    2.93 RD93 Chrysler 8.25″, 29 SPL 29 All
    2.94 RD94 Isuzu IFS, 17 SPL (replaced by RD203) 17 All
    2.95 RD95 Dana 60, 32 SPL, 4.56 & UP (replaced by RD164) 32 4.56 & UP
    2.96 RD96 Dana 60, 32 SPL, 4.10 & DN (replaced by RD165) 32 4.10 & DN
    2.97 RD97 Dana 70, 32 SPL, 4.56 & UP (replaced by RD170) 32 4.56 & UP
    2.98 RD98 Dana 70, 32 SPL, 4.10 & DN (replaced by RD171) 32 4.10 & DN
    2.99 RD99 Ford 9″, 35 SPL, 2″ BRNG 35 All
    2.991 RD99CE Ford 9″, 35 SPL, 2″ BRNG (CE) 35 All
    2.100 RD100 Dana 30, 27 SPL, 3.73 & UP 27 3.73 & UP
    2.101 RD101 Dana 30, 27 SPL, 3.54 & DN 27 3.54 & DN
    2.102 RD102 Dana 35, 27 SPL, 3.54 & UP 27 3.54 & UP
    2.103 RD103 Dana 35, 27 SPL, 3.31 & DN 27 3.31 & DN
    2.104 RD104 Dana 30, 30 SPL, 3.73 & UP 30 3.73 & UP
    2.105 RD105 Dana 35, 30 SPL, 3.54 & UP 30 3.54 & UP
    2.106 RD106 Nissan C200, 31 SPL (replaced by RD201) 31 All
    2.107 RD107 Nissan C200/R200A, 29 SPL (replaced by RD202) 29 All
    2.109 RD109 Dana 44, 35 SPL, 3.92 & UP 35 3.92 & UP
    2.110 RD110 Mitsubishi IFS, 28 SPL 28 All
    2.111 RD111 Toyota 8″ IFS, 53mm BRNG, 3.91 & UP 30 3.91 & UP
    2.112 RD112 Chrysler 8.25″, 27 SPL 27 All
    2.113 RD113 Dana 44, 33 SPL, 3.92 & UP 33 3.92 & UP
    2.114 RD114 GM 14 Bolt, 10.5″, 30 SPL, FF 30 4.10 & DN
    2.115 RD115 Dana 70HD, 37 SPL, 4.56 & UP (replaced by RD174) 37 4.56 & UP
    2.116 RD116 Dana 44, 30 SPL, 3.92 & UP 30 3.92 & UP
    2.117 RD117 Dana 44, 30 SPL, 3.73 & DN 30 3.73 & DN
    2.118 RD118 Suzuki Jimny, FR, 22 SPL, 10 Bolt RG (replaced by RD206) 22 All
    2.119 RD119 Ford 9″, 31 SPL 31 All
    2.121 RD121 Toyota 8″ IFS, 53mm BRNG, 3.73 & DN 30 3.73 & DN
    2.123 RD123 Mazda 8″, RR, shim adjusted 30 All
    2.124 RD124 Toyota 8.9″, C-clip, 50mm BRNG (replaced by RD153) 30 All
    2.125 RD125 Dana 35, non C-clip, 30 SPL, 3.54 & UP 30 3.54 & UP
    2.126 RD126 Santana PS-10, RR 34 All
    2.127 RD127 Land Rover, 10 SPL, Banjo 10 3.54
    2.128 RD128 Land Rover, 24 SPL, Banjo 24 3.54
    2.129 RD129 Toyota Tacoma, RR 30 All
    2.131 RD131 Toyota 8″ IFS, 50mm BRNG 30 All
    2.132 RD132 Toyota 8″, 50mm BRNG 30 All
    2.133 RD133 Toyota 8″ RR, shim adjusted 30 All
    2.134 RD134 Nissan H233, 31 SPL 31 All
    2.135 RD135 Nissan H233B, 33 SPL 33 All
    2.136 RD136 Nissan H233B, 31 SPL 31 All
    2.137 RD137 Nissan R230, 33 SPL, IRS, 3.54 & UP 33 3.54 & UP
    2.138 RD138 Land Rover, 24 SPL, Banjo, P38A 24 All
    2.139 RD139 AAM 11.5″, 30 SPL 30 All
    2.140 RD140 Ford 10.25″ & 10.5″ (Sterling / corporate) 35 All
    2.141 RD141 Toyota 8″ IFS, 34 SPL, 58mm BRNG (replaced by RD151) 34 All
    2.142 RD142 Toyota 8.9″, 50mm BRNG 30 All
    2.143 RD143 Dana 44, 32 SPL, 3.73 & DN 32 3.73 & DN
    2.144 RD144 Nissan H260, 34 SPL (replaced by RD214) 34 All
    2.145 RD145 Rockwell 2.5T, 16 SPL 16 All
    2.146 RD146 Toyota 10.5″, RR, 36 SPL 36 All
    2.147 RD147 Dana 44, 35 SPL, 3.73 & DN 35 3.73 & DN
    2.148 RD148 AAM 760, 28 SPL 28 All
    2.149 RD149 Nissan, M226, 32 SPL, 10 Bolt RG 32 All
    2.150 RD150 Ford 9.75″, 34 SPL, C-Clip 34 All
    2.151 RD151 Toyota 8″ IFS, 34 SPL 34 All
    2.152 RD152 Toyota 9.5″, 32 SPL 32 All
    2.153 RD153 Toyota 8.9″, C-Clip, 50mm BRNG 30 All
    2.154 RD154 Mitsubishi 9.5″, 31 SPL, live axle 31 All
    2.155 RD155 Mitsubishi 9.5″, 33 SPL, IRS 33 All
    2.156 RD156 Hyundai 9.5″, 34 SPL, live axle 34 All
    2.157 RD157 Jeep JK Rubicon, 35 SPL 35 All
    2.158 RD158 Dana 50, 30 SPL 30 All
    2.159 RD159 Nissan M226, 32 SPL, 12 Bolt RG 32 All
    2.160 RD160 Land Rover, Salisbury, 24 SPL, 4.70:1 24 4.70
    2.161 RD161 Land Rover, Salisbury, 24 SPL, 3.54:1 24 3.54
    2.162 RD162 Dana 60, 30 SPL, 4.56 & UP 30 4.56 & UP
    2.163 RD163 Dana 60, 30 SPL, 4.10 & DN 30 4.10 & DN
    2.164 RD164 Dana 60, 32 SPL, 4.56 & UP 32 4.56 & UP
    2.165 RD165 Dana 60, 32 SPL, 4.10 & DN 32 4.10 & DN
    2.166 RD166 Dana 60HD, 35 SPL, 4.56 & UP 35 4.56 & UP
    2.167 RD167 Dana 60HD, 35 SPL, 4.10 & DN 35 4.10 & DN
    2.168 RD168 Dana 60HD, C-Clip, 35 SPL, 4.56 & UP 35 4.56 & UP
    2.169 RD169 Dana 60HD, C-Clip, 35 SPL, 4.10 & DN 35 4.10 & DN
    2.170 RD170 Dana 70/80, 32 SPL, LOW SPEED 32 xxx & UP
    2.171 RD171 Dana 70/80, 32 SPL, HIGH SPEED 32 xxx & DN
    2.172 RD172 Dana 70/80 , 35 SPL, LOW SPEED 35 xxx & UP
    2.173 RD173 Dana 70/80, 35 SPL, HIGH SPEED 35 xxx & DN
    2.174 RD174 Dana 70/80, 37 SPL, LOW SPEED 37 xxx & UP
    2.175 RD175 Dana 70/80, 37 SPL, HIGH SPEED 37 xxx & DN
    2.176 RD176 Dana 70/80, 40 SPL, LOW SPEED 40 xxx & UP
    2.177 RD177 Dana 70/80, 40 SPL, HIGH SPEED 40 xxx & DN
    2.180 RD180 Nissan R180A, 27 SPL, 3.69 & UP 27 3.69 & UP
    2.181 RD181 Nissan R180A, 27 SPL, 3.54 & DN 27 3.54 & DN
    2.182 RD182 Nissan R180A, 27 SPL, 8 Bolt RG 27 All
    2.183 RD183 Toyota 10.5″, RR, 34 SPL 34 All
    2.186 RD186 AMC 20, 3.08 & UP 29 3.08 & UP
    2.187 RD187 AMC 20, 2.73 & DN 29 2.73 & DN
    2.188 RD188 Dana 60XHD, 40 SPL, 4.56 & UP 40 4.56 & UP
    2.189 RD189 Dana 60XHD, 40 SPL, 4.10 & DN 40 4.10 & DN
    2.193 RD193 Toyota 8″ RR, 12 Bolt RG, Shim adjusted 30 All
    2.195 RD195 Nissan Patrol Y62, RR 34 All
    2.196 RD196 Nissan C200K, 31 SPL 31 All
    2.197 RD197 AAM 925/950, 33 SPL 33 All
    2.198 RD198 VW Amarok Rear 30 All
    2.200 RD200 Rockwell 2.5T, 40 SPL 16 All
    2.201 RD201 Nissan C200, 31 SPL 31 All
    2.202 RD202 Nissan C200/R200A, 29 SPL 29 All
    2.203 RD203 Isuzu IFS, 17 SPL 17 All
    2.204 RD204 Suzuki Vitara, RR, 26 SPL, 10 Bolt RG 26 All
    2.205 RD205 Suzuki, FR, 22 SPL, 10 Bolt RG 22 All
    2.206 RD206 Suzuki Jimny, FR, 22 SPL, 10 Bolt RG 22 All
    2.207 RD207 Suzuki Jimny, FR, 22 SPL, 8 Bolt RG 22 All
    2.208 RD208 Suzuki, 26 SPL, 10 Bolt RG 26 All
    2.209 RD209 Suzuki Vitara, RR, 26 SPL, 12 Bolt RG 26 All
    2.210 RD210 Mitsubishi 8″, RR, 28 SPL 28 All
    2.212 RD212 Mitsubishi 9″, RR, 28 SPL 28 All
    2.213 RD213 Isuzu, RR, 26 SPL 26 All
    2.214 RD214 Nissan H260, 34 SPL 34 All
    2.215 RD215 Nissan H260, 37 SPL 37 All
    2.216 RD216 GM 12 Bolt, 8.9″, 30 SPL, 3.73 & UP 30 3.73 & UP
    2.217 RD217 LR Discovery 3 + 4, FR, 29 SPL 29 All
    2.218 RD218 LR Discovery 3, RR, 31 SPL 31 All
    2.219 RD219 T6 Ranger/BT-50, FR, 29 SPL 29 All
    2.220 RD220 T6 Ranger/BT-50, RR, 32 SPL 32 All
    2.221 RD221 GM8.5″ 10 Bolt AAM 860, 28 SPL 28 All
    2.222 RD222 GM8.5″ 10 Bolt AAM 860, 30 SPL 30 All
    2.223 RD223 Ford Ranger PJ, PK / Mazda BT-50, IFS, 30 SPL 30 All
    2.224 RD224 Nissan M205, FR, 30 SPL 30 All
    2.226 RD226 Dana 44A, 30 SPL 30 All
    2.228 RD228 Nissan C200K, FR, 34 SPL 34 All
    2.229 RD229 Nissan D23/NP300, RR, 34 SPL 34 All
    2.230 RD230 Nissan R180A, 30 SPL, 3.69 & UP 30 3.69 & UP
    2.231 RD231 Nissan R180A, 30 SPL, 3.54 & DN 30 3.54 & DN
    2.232 RD232 Toyota 8.9″ RR, 32 SPL, 12 bolt RG, Shim Adjusted 32 All
    2.234 RD234 GM 14 Bolt, 10.5″, 40 SPL, FF 40 4.10 & DN
    2.235 RD235 GM 14 Bolt, 10.5″, 35 SPL, FF 35 4.10 & DN
    NOTE: Contact ARB directly for model numbers not listed here.


  • Compressor Parts Lists

    A full parts list for all models of ARB air compressor.

    3.1 On-Board Air Compressor Kit, Medium (RDCKA & RDCKA24)
    3.2 Portable Air Compressor (RDCP & RDCPA)
    3.3 On-Board Air Compressor Kit, Compact (CKSA12)
    3.4 On-Board Air Compressor Kit, High Output (CKMA12 & CKMA24)
    3.5 Portable Air Compressor Kit, High Output (CKMP12)
    3.6 On-Board Air Compressor Kit, Maximum Performance (CKMTA12 & CKMTA24)
    3.7 Portable Air Compressor Kit, Maximum Performance (CKMTP12 & CKMTP24)


  • Accessory Parts Lists

    Information relating to optional compressor accessories.

    4.1 Bulkhead Fitting Kits
    4.2 Heavy Duty Air Line Kit (HDAL)
    4.3 Compressor Piston Service Kit
    4.4 Purge Valve Kit
    4.5 CKM Replacement Motor Cap


  • Tech Notes

    Reference guides including wiring diagrams, ring and pinion gear modifications and serial number interpretation.

    5.1 Screw Secured Seal Housing Set-up
    5.2 Spring Clip Secured Seal Housing Set-up
    5.3 Axle Identification
    5.4 Axle Modification
    5.5 Inspection for Bent Axles
    5.6 Ring and Pinion Gear Modifications
    5.7 Solenoid Valve
    5.8 Compressor Wiring Diagrams
    5.9 Compressor Fault Diagnosis Procedure
    5.10 Serial Number Interpretation
    5.11 Insuring Adequate Oil Drainage
    5.12 Installation in Ford Front Differentials
    5.13 Land Rover Salisbury Housing Modification
    5.14 Land Rover Axle Update


  • Appendix

    Additional information relating to servicing, specification and measurements.

    6.1 Service Guide
    6.2 Shim Kit Specifications
    6.3 Adjuster Nut Specifications
    6.4 Differential Ratio Calculator
    6.5 Differential Measurement Reference
    6.6 Packaging Weights and Dimensions
    6.7 Air Compressor Range Sizes & Specifications
    6.8 Tapered Roller Bearing Specifications
    6.9 Radial Seal Specifications (O-rings & X-rings)


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