103009-G | Relay Valve (R-12H Style)

RELAY VALVE – 103009-G

PART NUMBER(S):

Fleet Products: 103009-G | OE: 103009, 065476 | Automann: 170.103009

DESCRIPTION:

Model: R-12H multiple circuit relay valve
Vehicles: Compatible with heavy-duty trucks and trailers – rear axle air brake configurations
• Function: Distributes foot valve signal to service brake chambers for rapid application and release
• Crack Pressure: 4.0 PSI
• Port Configuration:
 – Supply (2): 3/4" NPT
 – Delivery (2): 1/2" NPT
 – Control (1): 1/4" NPT
 – Additional Total Ports: 12
• Mounting Style: Horizontal, with delivery ports on the side
• Dimensions:
 – Height: 5.0"
 – Width: 7.0"
 – Length: 7.0"
• Weight: 3.0–3.3 lbs
• Material: Aluminum body with replaceable internal cartridge
• Performance/Technology:
 – Replaceable inlet/exhaust cartridge
 – Compatible with coreless remanufactured options
 – Designed for efficient response time in rear axle service applications
 – FMVSS 121 compliant
• System Integrity: OEM-grade construction, backward-compatible with multiple legacy part numbers and trailer systems

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, R-12H, LP2103309, ZZLP2103009, E-BN103009X, KN24140, HVG103009N, 00716103009, 745103009N, 103009N, 103009X, 103009RX, 103009P, 170.103009, 5396-103009, KN32000, R955103009, E-103009, WA103009, 334-1597, 103009-G, 1686488C91, 103009BXW, 103009BXR, 102626, 102626BXW, 102626X, 0R102626BXR, BW102626, BX102626, R955102626, R955065303N, R955065303X, 65303X, 109264X, E-BN102626, 14390, TV065303, 1684-489-C, 1685-644-C, 3564-370-C91, 296694R91, ZZ102626, 745-065303, 20QE222BP1, 20QE222BP2, BER-065303, S-17743, S17743, BW065303, FLTBV303, ETP-102626, WA102626, 65303P, 107443, 107443X, 102165, 102165X, 102277, 102277X, RA86477, 119196201, 86824R93, 2097615, 2335215, 36Z106, 59A0620, A78882, X14476, EM103009

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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