Multiquip 12010 Piston Set With Pin OS=1.00

The Multiquip 12010 Piston Set With Pin OS=1.00 is a genuine OEM oversize piston assembly designed for a broad range of Multiquip concrete pumps, plate compactors, and ride-on power trowels including C30HDN, MVH408DZ, MVB85H, STX55, and HTX44 series equipment. As a direct Multiquip OEM component, this piston set is manufactured to the same specifications as the original part, ensuring correct bore clearance and dimensional accuracy in an OS=1.00 oversize grind. Whether you are rebuilding a worn engine on a Mayco concrete pump or restoring a ride-on trowel such as the HTN28K or HTXD6i, part 12010 delivers the correct fit for a proper engine rebuild. Verify your model code against the confirmed fitment list — this piston set covers an exceptionally wide range of Multiquip equipment families.

Key Features

• Oversize Bore Specification: — OS=1.00 oversize grind means this piston set is engineered for engines that have been bored out, restoring correct compression and cylinder wall clearance where standard-size pistons would no longer seal properly.
• Genuine OEM Manufacturing: — Produced to Multiquip OEM tolerances, this piston set meets the same dimensional and material standards as the part originally installed at the factory, critical for maintaining engine compression and longevity.
• Complete Set With Wrist Pin: — Includes the wrist pin, so you receive everything needed for a full piston installation without sourcing the pin separately, streamlining your rebuild process.
• Wide Equipment Compatibility: — Confirmed fitment across C30HDN Mayco concrete pumps, MVH408DZ and MVB85H plate compactors, and HTX44, STX55, HTN27K, HTN28K, HTXD6i, and STXD6i ride-on power trowels.
• Engine Rebuild Integrity: — A correctly sized piston maintains proper ring seal and oil control — a worn or incorrectly sized piston causes blow-by, loss of power, excessive oil consumption, and accelerated engine wear.

A piston set is a core engine component responsible for compressing the air-fuel mixture and transferring combustion force to the crankshaft via the connecting rod and wrist pin. When an engine cylinder is worn beyond the standard bore diameter, the cylinder is machined to a larger oversize dimension — in this case OS=1.00 — and an oversize piston is installed to match, restoring the tight seal between the piston rings and cylinder wall. Without the correct oversize piston, the engine will suffer from low compression, increased oil consumption, hard starting, and a significant loss of power output, ultimately shortening the life of a rebuilt engine.

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.