| Product Line | Brakes |
| Category Name | Air Brake Valves |
| Part Type | Front Axle Valve |
| Alternate Part Name | Pressure Proportioning Valve, Limiting & Quick Release Valve |
| Model | LQ-4 |
| OEM Part Number | 289148 |
| Application Type | Heavy Duty Trucks, Semi-Trucks |
| Delivery Port Orientation (CW from Mounting) | 180 deg. |
| Delivery Port Size | 3/8-18 NPT |
| Exhaust Port | Open |
| Mounting Hole Qty | 2 |
| Mounting Hole Size | Ø .34 in. |
| Supply Port Size | 3/8-18 NPT |
| Material | Die-cast Zinc |
| Maximum Operating Temperature | 200 deg. F (93 deg. C) |
| Minimum Operating Temperature | -40 deg. F (-40 deg. C) |
| Nominal Equalizing Pressure (Blend Back) | 65 psi |
| Nominal Hold-Off Pressure | 10 psi |
| Net Weight | 1.08 lb. |
| Cross References | 289148, 289148N, 289148X, 745-289148, 745289148, BXOR289148X, EBN289148X, EM57170, LAV-5717, LAV5717, OR289148X, R955289148X, EM37070 |
| Intended Application | - Front Axle/Steering for Trucks and Heavy Commercial Vehicles. Its primary function is to reduce brake application pressure on the front axle during normal braking, preventing lock-ups and improving vehicle stability. This type of valve is common in pneumatic brake systems on trucks and buses, especially those with air brake systems that require precise control of the pressure applied to the front brake chambers.
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