103009-G | Relay Valve (R-12H Style, Horizontal Mount) KN28140

RELAY VALVE – 103009-G

PART NUMBER(S):

Fleet Products: 103009-G | OE: 103009, 065476, KN28140 | Automann: 170.103009, 170.KN28140 | CAT: 1D-1466, 3J-4887, 4D-1466, 5T-5493, 5T-7242, 6G0593

DESCRIPTION:

Model: R-12H multiple circuit relay valve
Vehicles: Compatible with heavy-duty trucks and trailers – rear axle air brake 
• Function: Distributes foot valve signal to service brake chambers for rapid application and release
• Crack Pressure: 4.0 PSI
 – Supply (2): 3/4" NPT
 – Delivery (2): 1/2" NPT
 – Control (1): 1/4" NPT
 – Additional Ports: 12
• Mounting Style: Horizontal, with delivery ports on the side
 – Replaceable inlet/exhaust cartridge
 – Designed for efficient response time in rear axle service applications

Applications:
Designed for service brake circuits in air brake systems on heavy-duty trucks and trailers. Typically mounted near the rear axle to optimize air response. This valve enables rapid air transfer from the foot control valve to the rear brakes, improving stopping efficiency and minimizing lag. Compatible with systems using Bendix R-12H or equivalent designs.

CROSS-REFERENCE(S):

103009, 103009BXW, 103009BXR, 103009CX, 103009N, 103009NP, 103009P, 103009RX, 103009X, 103009-G, 0R103009BXR, 800238, BW103009N, BW800238, BX800238, BXW103009, OR103009X, FLTFS103009N, Automann 170.103009, AM170103009, 170.KN28061, Bendix 103009, Velvac 034026, 34026, Haldex 103009X, KN28061, KN28061X, KN28132, KN28132X, KN28140, KN28140X, KN24140, KN32000, Caterpillar 1D-1466, 3J-4887, 4D-1466, 5T-5493, 5T-7242, Navistar 1677541C, BX103009, BX103009N, NS103009, 1686488C91, Mack 745-103009, 745-103009N, 745-103009RX, 745103009, 745103009N, Freightliner BW103009, BWOR103009, Volvo 85102510, WABCO 9732860010, 9732980050, 9732980060, 9732980070, 9732980110, Meritor R955103009N, R955103009, Euclid / Rockwell EBN103009N, PAI 3596, 35960, EM35960, LRV-3596, Dayton AV103009, Tectran 14397, TV103009, Tramec Sloan 401168, MCI 4C-11-1, Di-Pro DP30064, Fleetcraft FC103009, Fleetrite FLTBV009, BWP M-103009, Torque TR103009, Genuine Newstar BER-103009, S-6006A, S6006A, OE Aftermarket 12340, B6006AGRP, F103009, F224637, R-12H, LP2103309, ZZLP2103009, E-BN103009X, HVG103009N, 00716103009, 5396-103009, E-103009, WA103009, 334-1597, RA86477, EM103009, R955065303N, R955065303X, 65303X, 65303P, TV065303, BER-065303, S-17743, S17743, BW065303, FLTBV303, 745-065303, 20QE222BP1, 20QE222BP2, 1684-489-C, 1685-644-C, 3564-370-C91, 296694R91, 109264X, E-14390, 107443, 107443X, 102165, 102165X, 102277, 102277X, 119196201, 86824R93, 2097615, 2335215, 36Z106, 59A0620, A78882, X14476

A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.

IMPORTANT INSTALLATION NOTES:

✔ Mount valve horizontally with delivery ports on the side as per OEM configuration
✔ Use proper NPT thread sealant and torque per standard guidelines
✔ Install as close to rear axle brake chambers as possible for optimal performance
✔ Ensure 4.0 PSI crack pressure matches system spec
✔ Confirm cartridge accessibility for future servicing
✔ Check all port fittings for leaks post-installation
✔ Complies with FMVSS 121 for service brake systems

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