Multiquip 43140-79 Engine Coolant Overflow

The Multiquip 43140-79 Engine Coolant Overflow is a genuine OEM component designed for STXDF series super-sized hydrostatic ride-on power trowels. As a direct Multiquip OEM part, 43140-79 is manufactured to the same standards as the original component it replaces, ensuring proper fit and function within the cooling system. This part is confirmed for STXDF dual-fuel hydrostatic trowels and is sourced directly through authorized Multiquip distribution channels at DHS Equipment.

Key Features

• Genuine OEM Cooling System Component — Manufactured to original Multiquip specifications, ensuring the coolant overflow reservoir maintains correct system pressure and fluid capacity without compromise.
• Direct-Fit Replacement — Engineered to match the original mounting points and connection fittings on STXDF trowels, allowing straightforward installation without custom modification.
• STXDF Series Compatibility — Verified fitment for Multiquip STXDF super-sized hydrostatic dual-fuel ride-on power trowels.
• Protects Engine from Thermal Damage — A properly functioning coolant overflow reservoir prevents coolant loss during heat cycles, keeping the engine operating within its safe temperature range during extended finishing runs.
• Cooling System Integrity — A failed or cracked overflow reservoir can introduce air into the cooling loop, leading to overheating and unplanned machine downtime on the pour — replacing it promptly restores system reliability.

The engine coolant overflow reservoir acts as a buffer tank for the engine's cooling system. As the engine heats up, coolant expands and the excess is directed into this reservoir; as the engine cools, that fluid is drawn back into the system to maintain the correct coolant level. When the reservoir cracks, leaks, or becomes blocked, the cooling system loses its ability to regulate fluid volume properly, which can lead to overheating, air pockets in the coolant loop, and potential engine damage during heavy-duty concrete finishing operations.

For fitment questions or to confirm this part is correct for your machine, contact the DHS Equipment team before ordering.

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.