The Multiquip 1590121050 is a genuine OEM Piston Ring Assembly designed for BLW-400SSW, KD1800, KD1800KD6, and KD6 series equipment. As a factory-authorized component, it is manufactured to the exact tolerances required by Multiquip for proper engine sealing and compression. This assembly is a direct OEM replacement, ensuring the engine performs as originally engineered without the guesswork of cross-referencing aftermarket alternatives. DHS Equipment supplies this part direct, so you can confirm fitment by model code and order with confidence.
Key Features
- Exact OEM Compression Tolerancing — Manufactured to Multiquip's original ring gap and wall-thickness specifications, maintaining the correct compression seal between piston and cylinder bore.
- Drop-In Engine Replacement — Engineered to install directly into the existing cylinder bore on compatible models with no sleeve modification or bore alteration needed.
- Broad Model Coverage — Fits BLW-400SSW welders and KD1800, KD1800KD6, and KD6 core drill power units, consolidating one part number across multiple Multiquip equipment lines.
- Restores Full Power Output — Worn or broken piston rings allow combustion gases to bypass the piston, causing loss of compression, oil burning, and reduced output power; replacing with this part restores full engine performance.
- Genuine OEM Sourcing — Supplied as an authentic Multiquip component, not a rebranded substitute, so material grade and ring profile match the original build specification exactly.
A piston ring assembly seals the gap between the piston and the cylinder wall inside the engine, serving three critical functions: containing combustion pressure to drive the power stroke, scraping excess oil off the cylinder wall to prevent oil burning, and transferring heat away from the piston into the cylinder. When piston rings wear, crack, or lose tension, compression drops sharply, the engine begins consuming oil, and combustion efficiency falls — symptoms often misdiagnosed as carburetor or ignition faults. Replacing the Piston Ring Assembly with a correctly spec'd OEM set like the Multiquip 1590121050 is the most direct way to restore compression and return the engine to its original operating condition.
Part Details
| Part Number | 1590121050 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Piston Ring Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | BLW-400SSW |
| Core Drills | KD1800 |
| Core Drills | KD1800KD6 |
| Core Drills | KD6 |
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.
