Multiquip 366900170 Cup and Packing Set

The Multiquip 366900170 Cup and Packing Set is a genuine OEM replacement designed for MTX-series rammers including the MTX50HD, MTX60HD, MTX70HD, MTX70HDR, and MTX80HDR. As a direct OEM part, it is manufactured to the same specifications as the original component, ensuring a correct, consistent fit within the compaction assembly. This set is the proper service solution when the existing cups or packing show wear, deformation, or loss of compression, keeping your rammer operating at full stroke efficiency.

Key Features

• Genuine OEM Material Grade — Cup and packing components are produced to OEM compression and durometer specifications, maintaining proper seal integrity under the high-cycle reciprocating loads of a rammer.
• Direct-Fit Replacement — Engineered as an exact match to the original assembly, the 366900170 seats and aligns correctly within the MTX-series piston and cylinder arrangement without modification.
• Broad MTX-Series Compatibility — Confirmed fitment across the MTX50HD, MTX60HD, MTX70HD, MTX70HDR, and MTX80HDR, covering both GX100 diaphragm-carbureted and GX120 diaphragm-carbureted rammer models.
• Restores Full Stroke Performance — Worn or hardened packing leads to loss of compression stroke, reducing impact force and compaction depth. Replacing with 366900170 restores the designed foot-pounds of impact energy.
• Correct Fuel System Sealing — The packing set provides the proper seal between moving components in the lower end, preventing fluid bypass that can cause erratic ramming cycles or accelerated internal wear.

The cup and packing set is a critical sealing assembly within the rammer's lower reciprocating mechanism. The cups create a compression seal that converts engine power into the downward impact stroke used for soil compaction, while the packing maintains the seal under continuous high-frequency cycling. When these components wear or harden over time, compression escapes past the seal, the rammer loses impact force, and the machine may cycle erratically or fail to compact effectively. Replacing the cups and packing at the first sign of stroke loss is one of the most cost-effective ways to restore a rammer to full working condition.

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.