Product Overview
Preco SWM43C Omnidirectional Spring-Actuated Reverse Alarm Limit Switch
Condition
New old stock, unused. Kit components include the molded switch body with flexible omnidirectional spring wand and rubber boot, bare steel backplate, flat gasket, two slotted zinc-plated mounting brackets, nylon strain-relief cable gland, metallic conduit clamp fitting, and mounting hardware including machine screws, hex nuts, flat washers, and internal-tooth lock washers.
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Product Overview
Engineered for heavy equipment, commercial trucks, and industrial vehicles, Preco Model SWM43C provides reliable mechanical actuation for reverse alarm signaling circuits. The switch utilizes a flexible coil spring actuator wand that triggers the internal microswitch from any direction through 360 degrees of deflection. Designed for chassis and transmission linkage mounting, this complete installation kit provides the necessary brackets, cable sealing fittings, and hardware required to integrate or replace a reverse signaling trigger across 12V to 80V DC vehicle electrical systems.
Key Features
- Omnidirectional mechanical actuation via flexible coil spring wand with protective rubber boot
- Field-configurable internal snap-action microswitch with screw terminals marked NO (Normally Open) and NC (Normally Closed)
- Electrical rating: 5 A current capacity across a 12 V to 80 V DC operational range
- Molded water-resistant housing with gasketed metal backplate
- Cable and conduit entry options: includes nylon liquid-tight cord grip gland and metal conduit clamp fitting
- Dual slotted zinc-plated steel mounting brackets for adjustable positioning along linkages or transmission arms
- Hardware included: machine screws, hex nuts, flat washers, and internal-tooth lock washers
Applications
- Rigging reverse alarm activation on heavy trucks, forklifts, loaders, and material handling equipment when shifted into reverse gear
- Mounting along mechanical shift linkages or transmission levers to signal back-up horns, strobe lights, or auxiliary safety warning devices
- Replacing worn or damaged mechanical trigger switches on legacy commercial fleet safety systems
- Custom automated shop projects, such as end-of-travel limit switching on material carts, sliding gates, or overhead gantry stops
- Farm equipment and utility vehicle builds requiring rugged, multi-directional deflection switching exposed to dust and vibration
Frequently Asked Questions
How is the switch wired for Normally Open versus Normally Closed operation?
The internal snap-action switch contains separate, labeled screw terminals for Normally Open (NO) and Normally Closed (NC) circuits alongside a common input. Wire to the NO terminal for circuits that should energize when the spring arm is displaced, such as a back-up alarm sounding in reverse.
How does the flexible spring actuator operate?
The actuator features a steel coil spring wand that flexes 360 degrees in any direction. When a shift lever, transmission linkage, or moving assembly pushes against the wand from any angle, it transfers mechanical force to depress the internal microswitch plunger. Once the physical obstruction moves away, the spring returns to center.
What hardware and fittings are included in the kit?
The kit includes the switch body with spring wand, rubber sealing boot, steel backplate, flat gasket, two slotted zinc-plated mounting brackets, a nylon cable gland, a metal conduit clamp fitting, machine screws, hex nuts, flat washers, and internal-tooth lock washers.
Why buy an individual switch kit here rather than taking chances on a surplus lot?
Every kit is authentic new old stock complete with its mounting brackets, hardware, and cable fittings, eliminating the guesswork of damaged parts or missing hardware often found in unverified surplus lots. More pieces cost less each, and the price-break table on this page shows what each quantity costs. This item qualifies for free shipping on its own, and orders leave our Idaho warehouse the same or next business day.
A tough spring wand doesn't care which angle the shift linkage hits it from - it just snaps closed and does the job. Bolt it to the bracket, land your leads, and put that rig back in service.
