Multiquip EM802515 Relay, 80 Amp, Engine Pre-Heat

The Multiquip EM802515 Relay, 80 Amp, Engine Pre-Heat is a genuine OEM component designed for LS600P and LS300P hydraulic-driven concrete pumps. As a direct OEM replacement, it meets the original electrical specifications required for dependable cold-start performance on these machines. Sourced directly through the Multiquip parts network, the EM802515 ensures correct fit and function on compatible LS-series units without guesswork or adaptation. DHS Equipment stocks this part to support concrete pump operators who need a verified, ready-to-install solution.

Key Features

• OEM-Rated Amperage: — Rated at 80 amps to match the original electrical load demands of the engine pre-heat circuit — no under-spec substitutes.
• Direct Connector Match: — Engineered to plug into the existing relay socket on LS-series concrete pumps for a straightforward swap with no wiring modifications.
• LS-Series Fitment Confirmed: — Verified for use on the LS600P and LS300P hydraulic-driven concrete pump models.
• Cold-Start Circuit Integrity: — A correctly functioning pre-heat relay ensures the glow plug system activates fully before cranking, protecting the diesel engine from hard starts and incomplete combustion cycles.
• Electrical Safety Compliance: — Using an OEM relay with the correct amperage rating prevents overloading the pre-heat circuit, which can cause wiring damage or failure to start in cold operating conditions.

The engine pre-heat relay controls the flow of high-amperage current to the glow plugs that warm the diesel engine's combustion chambers before startup. When this relay fails or degrades, the glow plugs may not receive adequate power, resulting in hard starts, excessive engine cranking, or no-start conditions — particularly in cold weather. Replacing a faulty pre-heat relay with the correct OEM unit restores reliable cold-start function and protects the rest of the electrical system from the stress of repeated failed start attempts.

For questions about fitment or to confirm compatibility with your specific unit, contact the DHS Equipment parts team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.