Looking for a reliable lift axle control box to replace or upgrade your in-cab air suspension controls? This guide highlights five strong options that fit common Buyers and aftermarket systems, helping you choose the right box for smooth raise/lower operations. The best picks cover different styles—toggle valves, push-pull air valves, pre-plumbed assemblies, and compact consoles—so you can match your truck configuration and installation preferences. Ideal buyers include fleet operators seeking quick-install solutions, DIY enthusiasts aiming for straightforward wiring, and those upgrading aging control boxes for improved lift accuracy and cab control.
Summary table of selected products:
| Product | Brand | Best For | Notes |
|---|---|---|---|
| Demfec Lift Axle Control Assy (6451055 compatible) | Demfec | Direct replacement, easy install | Push-Pull air valve, high compatibility |
| Demfec Lift Axle Control Assembly With Toggle Valve | Demfec | Pre-plumbed, ready-to-install | Includes fittings/DOT lines |
| 156879 Skyjack Control Box | ARELLY | Skyjack compatibility | Used for various SJ models |
| Buyers Products 6451051 Lift Axle Control Assembly | Buyers Products | In-cab control, pre-plumbed | DOT tubing included |
| Buyers Products 6451050 Valve Assembly | Buyers Products | Single-acting valve, pre-assembled | Pre-plumbed with mounting plate |
Demfec Lift Axle Control Assy Compatible with Buyers 6451055
Best for direct replacement needs. This lift axle control assembly features a push-pull air valve and is designed to replace the original 6451055 component with precision. It provides cab-access controls for air suspension and lift operations, enabling smooth raising and lowering of the lift axle. Best for fleets and owners who want a seamless integration with Buyers systems without rewiring. Limitation: compatibility is specified for Buyers 6451055, so verify your exact model before ordering.
Demfec Lift Axle Control Assembly With Toggle Valve
Better for installations prioritizing pre-plumbed assemblies. This unit comes pre-assembled with fittings and DOT tubing, simplifying installation and ensuring reliable air connections. Best for operators who value a turnkey setup and want to minimize on-truck assembly work. Caution: verify compatibility with your specific lift axle system; some configurations may require adaptation.
156879 156991 Control Box Controller for Skyjack Lifts
Best for Skyjack-specific applications. This control box is targeted at multiple Skyjack models (SJIII series) and is listed as compatible with several common lift configurations. Choose this if your fleet uses Skyjack equipment or needs a compact, cab-access control solution. Limitation: primarily marketed for Skyjack controllers; cross-compatibility with non-Skyjack brands may vary.
Buyers Products 6451051 Lift Axle Control Assembly
Best for in-cab control with a reliable pre-plumbed setup. This unit includes fittings and DOT tubing, plus a pre-assembled assembly that reduces installation time. It features a manual toggle air valve for straightforward operation and is designed for raise/lower lift axle applications. Use this if you want a robust in-cab control with a durable mounting plate. Caution: ensure the mounting plate fits your chassis and that DOT tubing length matches your cab layout.
Buyers Products 6451050 Valve Assembly With Push-Pull Valve
Best for single-acting, in-cab control needs. This pre-assembled unit uses a push-pull air valve to raise and lower the lift axle and includes DOT tubing and a mounting plate. Choose this if you want a simple, reliable single-acting solution with a durable mounting base. Limitation: may not be ideal for systems requiring dual-acting or feathering control features.
Buying Guide
Key considerations to guide your purchase:
- Compatibility: Confirm model numbers (6451055, 6451051, etc.) and brand compatibility with your truck’s lift axle system.
- Valve Type: Decide between push-pull and toggle air valves. Push-pull tends to be simpler for retrofits; toggle valves may offer more direct control in some configurations.
- Pre-Plumbed vs. DIY: Pre-plumbed assemblies save time but ensure the tubing length and fittings match your installation space.
- Included Components: Look for DOT tubing, mounting plates, and fittings; these reduce additional parts shopping.
- Installation Environment: For harsh work environments, seek powder-coated mounting hardware and corrosion-resistant components.
- Application Scope: Some boxes are optimized for specific brands (Skyjack, Buyers, etc.); verify cross-compatibility with your equipment.
FAQ
- What is a lift axle control box used for? It provides in-cab control to raise and lower the lift axle via air suspension or hydraulic systems.
- Can I mix valve types in one system? Mixing valve types is possible in some setups but may require additional wiring or adapters. Check compatibility with your current wiring diagram.
- Is pre-plumbed really easier? Yes. Pre-plumbed assemblies reduce installation time and minimize potential air line misconfigurations.
- Are these boxes universal for all brands? Not always. Some are brand- or model-specific; verify compatibility with your truck and lift axle system before purchasing.
- Do these kits include mounting plates? Many do, but always confirm included components to avoid extra orders.
- What should I inspect before installation? Check for intact fittings, proper DOT tubing length, and secure mounting points to prevent vibration and leaks.