Multiquip 12000ZDJ305 Cylinder Barrel Assembly

The Multiquip 12000ZDJ305 Cylinder Barrel Assembly is a genuine OEM component designed for MTX70HDR and MTX80HDR series rammers. As a direct Multiquip OEM part, it is manufactured to the same specification as the original component installed at the factory, ensuring a correct fit without modification. This assembly is compatible with MTX70HDR and MTX80HDR tampers equipped with the GXR120 Honda engine. Sourcing the correct cylinder barrel assembly is critical to restoring full compression and consistent ramming performance on these machines.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's original bore dimensions and material grade, ensuring correct compression characteristics in the GXR120 engine cylinder.
• Direct-Fit Replacement — Engineered to install directly in place of the original barrel on MTX70HDR and MTX80HDR rammers, with matching mounting and port geometry.
• Confirmed Fitment — Verified for MTX70HDR and MTX80HDR tampers; always cross-reference your model code before ordering.
• Compression Integrity — A sound cylinder barrel maintains proper combustion pressure, which directly drives the ramming stroke force and compaction output of the machine.
• Engine Safety Compliance — Correct cylinder bore geometry supports proper piston seal and reduces the risk of blow-by, overheating, or engine failure during sustained operation.

The cylinder barrel is the core structural bore of the engine in which the piston travels to generate combustion pressure. In a rammer like the MTX70HDR or MTX80HDR, that combustion pressure drives the ramming mechanism, so the condition of the barrel directly determines how effectively the machine delivers impact force to the ground. When a cylinder barrel wears, becomes scored, or develops cracks, compression drops, the engine loses power, and the tamper's compaction performance deteriorates — eventually leading to a no-start or mechanical failure condition.

For help confirming this is the right part for your machine, contact the DHS Equipment 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.