Description
GOVERNOR VALVE – D2 STYLE, ADJUSTABLE 95–120 PSI RANGE
PART NUMBER(S):
Fleet Products: 284358, 284358-G | OE: 284358, 275491, N30190CA | Automann: 170.284358 | Military Part Number:10900525-5 |
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Bendix: 065018, 275200N, 275491N, 275491RX, 275508N, 275530N, 275707N, 275707RX, 284358N, 284358RX, KN18530X, OR275491, OR275491RX
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Bepco: 275491X
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BWP-NSI: M-275491
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Haldex: 275491RX, KN18530, KN18536
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Navistar: RKN18530
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Paccar: 275491BXW
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Power Products: 275491P
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Precision: KN18530CX
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S & S Truck Parts: S-9977
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SORL: RL3512GL-C
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Tectran: TV275491
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TKL: 275491X
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Tramec Sloan: 401142-25
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Wabco: WKN18532, CAT 1W-8939
DESCRIPTION:
Model: D2 Air Brake Compressor Governor Valve
Vehicles: Universal fit for heavy-duty truck and trailer air brake systems
• Valve Type: D2-style pneumatic compressor governor
• Function: Automatically controls cut-in and cut-out air pressures in brake system
• Actuation: Pneumatic, pressure-operated, normally closed
• Cut-In Pressure: 95 PSI nominal
• Cut-Out Pressure: 120 PSI nominal (adjustable up to 125 PSI)
• Two .34 Diameter Mounting Holes
• Mounting Gasket and 4 Plugs Included
• Pressure Differential Range: 15–30 PSI above cut-in (adjustable)
• Adjustment: External screw (1/4 turn ≈ 4 PSI change)
• Port Configuration:
– (3) Reservoir Ports: 1/8"-27 NPT
– (3) Unloader Ports: 1/8"-27 NPT
– (1) Exhaust Port: 1/8"-27 NPT
• Mounting: Direct to compressor or remote (2 holes, 0.336" diameter)
• Construction: Metal body with non-metallic or metallic piston
• Temperature Range: –40°F (–40°C) to 250°F (121°C)
• Weight: ~0.5 lbs (Includes: Gasket and 4 pipe plugs)
• Features:
– High-temperature o-rings and waterproof cover
– Adjustable cut-in/cut-out pressures
– Reliable direct or remote mounting options
– Meets OEM standards for durability and consistency
Applications:
Used across a wide range of heavy-duty vehicles to regulate air compressor performance within a predefined pressure band. Ensures consistent brake system air pressure by signaling the compressor to load or unload. Ideal for use in high-temperature and endurance-demanding air brake environments. Suitable for direct or remote mounting configurations.
CROSS-REFERENCE(S):
284358, 275491, 276024, 276025, 276026, 276027, 276028, 276029, 276030, 276032, 276033, 276034, 276037, 276038, 276039, 276040, 276041, 276042, 276043, 276049, 276108, 276227, 276228, 276229, 276230, 276234, 276336, 276380, 277114, 277115, 277174, 277191, 277192, 277239, 277240, 277243, 277244, 277283, 277284, 277484, 277486, 277488, 277489, 277490, 277491, 277492, 277493, 277494, 277495, 277496, 277497, 277498, 277504, 277505, 277506, 277507, 277508, 277509, 277510, 277511, 277618, 277619, 277620, 277627, 277648, 277811, 277812, 279160, 279476, 279491, 279650, 280240, 280244, 280376, 281058, 281205, 282436, 282512, 283082, 283349, 284312, 285443, 285561, 285562, 285691, 287308, 287309, 287422, 287425, 287426, 288047, 288296, 288858, 289967, 2991785C91, 30010, 310432, 32131, 335300, 3502412, 3507227, 3524999, 360255, 3970806, 401142, 401237, 410986, 42002048, 433680R91, 443680R91, 4753150000, 4L81, 4N9680, 5000586, 5003564, 5004049, 509803, 51202501, 51207501, 51211503, 517114, 5300271001, 541211503, 621905C, 637209190, 664760C91, 6814200318, 682846, 701013402, 702236C91, 724120, 745-275491, 745-275707, 745-284358, 745-800361, 75491, 763422, 778703C91, 785, 79019782, 7S4340, 800361, 8008799, 802523, 802537, 8068779, 8206500000, 8235-275491, 8235-284358, 825384, 84358, 85102532, 85611115, 88615, 88936184, 8922321, 900109A, 908160, 9155GX, 9155GY, 9335300, 97919200151, 997067R91, A5491, AA0105002, AE32586, AE763422, APL100000, AV275491, AV284358, BAN275707, BAN284358, BEN275491, BEN275707, BEN800361, BH284358, BHS-6106, BKVLV51637, BW275491, BW275707, BW284358, BW5004049, BW800361, BX275491, BX284358, BX800361, C2TA2885B, C7TA2885B, D0HZ2885A, D0TZ2885A, D66474, E122232, E13587007, E150258, E360255, EM36450, F024034, F102324, F105836, F108144, F108839, F116702, F119399, F123538, FLTBV358, FRL42002048, G8602, G9208529, K050707, K275491, K284358, K29566, KN18500, KN18530, KN18534, KN18536, KN18537, L32563, L33185, LGV3645, LM6864310306, M275491, M39457, M39528, M8001, M900446, M900490, M92002, MCP18530, MC119399, MC252540, MC39457, MC39528, N30190, N37252, OR18530, OR275491, OR284358, P101863, P284358, PD800361, R275491, R284358, R955275491, R955284358, RKN18530, S-11874, S-6106, S-A535, S-F496, S275508, S4753150060, SA535, SST-ACF06016701, TLA275491, TLA284358, TMI14026, TV284358, U55-1018530, VLV51637, WA2085, WA275491, WA284358, X284358, XA59489, ZAC275491, ZAC800361.
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:
✔ All ports are 1/8"-27 NPT; use proper sealing compound
✔ Mount directly to compressor or remotely using two 0.336" holes
✔ Adjust pressure setting using external screw (1/4 turn ≈ 4 PSI)
✔ Use included gasket and pipe plugs where applicable
✔ Confirm system operating range matches cut-in/cut-out specs
✔ Avoid excessive adjustment — cut-in/cut-out range differential is fixed
✔ Check system for leakage using soapy water at exhaust and cover
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Warranty Information
