The Multiquip 1685121112 Standard Piston is a genuine OEM component designed for DLW300ES and DAC7000SS series equipment. As a direct OEM replacement, this piston is manufactured to the exact specifications required by Multiquip diesel-powered welders and generators, ensuring a correct drop-in fit within the engine assembly. Verified fitment covers the DLW300ES, DAC7000SSA, DAC7000SSW, and DAC7000SS models. For high-cycle diesel equipment running demanding jobsite loads, sourcing the correct OEM piston is critical to restoring proper compression and engine output.
Key Features
- Genuine OEM Piston Specification — Manufactured to Multiquip's exact bore diameter, ring groove depth, and crown profile, ensuring correct compression ratio is restored after engine rebuild.
- Standard Bore Sizing — This is a standard (STD) piston intended for use in unworn or freshly honed cylinders at original bore dimensions — no overbore required.
- Confirmed Fitment — Directly compatible with DLW300ES, DAC7000SSA, DAC7000SSW, and DAC7000SS series diesel welders and generators.
- Restored Engine Compression — A worn or damaged piston causes loss of compression, hard starting, excessive oil consumption, and reduced power output; replacing with 1685121112 returns the engine to full operating specification.
- Critical Fuel System Integrity — A properly fitted piston maintains the combustion seal necessary for safe, controlled diesel ignition — an ill-fitting piston risks blow-by, overheating, and uncontrolled combustion events.
The piston is the reciprocating component inside the engine cylinder that compresses the air-fuel mixture and transfers combustion force to the crankshaft via the connecting rod. In diesel engines, precise piston-to-bore clearance is essential — too much clearance causes blow-by and oil burning, while an incorrect crown profile disrupts the compression ratio needed for reliable diesel ignition. Over time, pistons wear, score, or crack under the sustained high-compression cycles typical of generator and welder applications; replacing a failed piston with the correct OEM part is the most direct way to restore full engine power and fuel efficiency.
Part Details
| Part Number | 1685121112 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Standard Piston |
Compatibility & Fitment
| Name | Model |
|---|---|
| Welders | DLW300ES |
| Welders | DLW300ESA |
| Welders | DLW300ESA1 |
| Diesel Powered Generators | DAC7000SSA |
| Diesel Powered Generators | DAC7000SSW |
| Diesel Powered Generators | DAC7000SS |
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.
