Description
286370-G – R-8 RELAY VALVE
PART NUMBER(S):
Fleet Products: 286370-G
OE: 286370, 286370N, 286370RX, FF224690
Automann: 170.286370
DESCRIPTION:
Model: R-8 Relay Valve (Piston Operated)
Vehicles: Used in long wheelbase trucks, trailers, tractors
• Valve Type: R-8 style relay valve with integrated balance port
• Function: Controls rear axle service and spring brakes; features anti-compounding via balance port
• Actuation: Pneumatic, high-capacity graduating valve
• Supply Ports: 2 × 3/4" NPT, 1 × 1/4" NPT
• Delivery Ports: 2 × 1/2" NPT
• Control Port: 1 × 1/4" NPT
• Balance Port: 1/8" NPT (located under exhaust cover)
• Crack Pressure: 3 PSI
• Port Orientation: 90° from mounting flange
• Mounting: Standard R-8 relay valve bolt pattern (not specified in sources)
• Service Notes: Inlet/exhaust cartridge can be replaced without removing air lines
• Exhaust Cover: Included, with removable screw to access balance port
• System Fitment: Air brake systems on heavy-duty vehicles requiring responsive rear axle brake control
• Performance: High-flow actuation; suitable for spring and service brake modulation; used where fast rear axle response is critical
Applications:
Ideal for heavy-duty trucks and trailers with long wheelbase designs. Provides quick relay of brake application to rear service chambers and modulates spring brake engagement to avoid compounding. Designed for systems requiring integral anti-compounding control or quick exhaust behavior.
CROSS-REFERENCE(S):
286370, 286370N, 286370R, 286370RX, 286371, 286371X, 287277, 287277X, RKN28071, KN28071, 22A2696, 825735, 10130548, 9069725, 763353, AE763353, 936750, 1676729C1, 666969C91, 90001269, 90002279, S9174, 110412, 110416, 24693, 36U94D1, 4017724, 034024, 1092945, 1690499, 79105006, K295130, 745-286370, 745286370N, HVG286370N, 53286370N, 0R286370, BAN286370, BAR286370, BX286370, E-BN286370N, AV286370, S-9174, TV286370, WA286370, R955286370N, EM56160, 5616, 56160, LRV-5616, GDX286370, VTC-1749, B9174GRP, SM-3070FF, 401210
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:
✔ Ensure correct orientation—service port is rotated 90° from mounting flange
✔ Remove cover screw to access anti-compounding balance port
✔ Inlet/exhaust valve cartridge can be replaced without removing air lines
✔ Use in rear axle service/spring brake systems; not intended for front axle or ABS-managed circuits
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Warranty Information
