Description
065303-G - R-12 RELAY VALVE
PART NUMBER(S):
Fleet Products: 065303-G, 065303 | Replaces OE: Bendix: 108281, 65303 | Navistar: 1684488C91, 1684489C91, 1685644C91 | Volvo: 85103904 | Automann: 170.065303 | Meritor: R955065303N
DESCRIPTION:
Model: Bendix R-12 Service Brake Relay Valve
Vehicles: Heavy-duty trucks, tractors, trailers, and buses using compatible rear service brake circuits
• Valve Type: Pneumatically operated service brake relay valve
• Supply Ports: Two 1/2"-14 NPT
• Delivery Ports: Four 3/8"-18 NPT, two vertical and two horizontal
• Control Port: One 1/4"-18 NPT
• Crack Pressure: 4.0 PSI
• Mounting: Vertical installation with universal mounting bracket
• Mounting Holes: Two 0.52" diameter holes on 2.61" centres
• Exhaust Port: Downward-facing exhaust with protective dust shield
• Operating Temperature: -40°F to 200°F (-40°C to 93°C)
• Function: Relays reservoir air to the rear service brake chambers for faster brake application and release
• System Configuration: Two supply connections and four delivery connections
Applications:
Designed for commercial vehicle air brake systems requiring an R-12 relay valve positioned near the rear service brake chambers. It is typically replaced when brake application or release becomes delayed, delivery pressure becomes inconsistent, or the valve develops internal or external air leakage.
CROSS-REFERENCE(S):
060-065303, 108343, 108968, 109839, 5002150, 2004816C91, 2032514C91, 3508846C91, ZAC065303, K047646, KO47646, WBW065303, BNW065303, BEN065303, 5019003, 401274, 401820, 65303X, H065303X, MID65303X, 065303BXW, 65303XM1D, 745-065303, AV065303, BAN065303, BX065303, R955065303X, S-17743, S17743, TLA65303, TV065303, TWDBEN065303, WA65303, EBN065303N, K044963, BER-065303, 3564370C91, 3564-370-C91, BW065303, BW 065303, BW108281, BX108281, BEN-065303, 14390, 65303P, FLTBV303, 1684-489-C, 1685-644-C, 170065303, 065303N, 065303X, 065303RX, 8235R955065303N, TDAR955065303N
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Mount the valve vertically with the exhaust port and dust shield facing downward.
✔ Match the two 1/2" supply, four 3/8" delivery, and 1/4" control connections to the original air-line layout.
✔ Apply air-system-compatible thread sealant without allowing sealant to enter the valve ports.
✔ Verify that the application requires a 4.0 PSI crack pressure.
✔ Mount near the service brake chambers, then pressurize and test for balanced delivery, rapid release, and air leakage.
Warranty Information
