The Bucher PM-3551-0667 2-Way Hydraulic Power Unit is a compact 12V double-acting HPU with a 3-quart high-density polyethylene reservoir — the small-footprint version of the PM-3551. It powers cylinders both up and down at 2,500 PSI, fitting in tight installations where the full 2-gallon reservoir won’t fit.
Which Bucher 2-way HPU should I choose — 3-quart or 2-gallon?
Pick the 3-quart for small or short-cycle cylinders where reservoir volume isn’t the limiter and mounting space is tight. Pick the 2-gallon when you have room and the cylinder pulls a lot of fluid each cycle, or when extended duty would heat a smaller reservoir past spec.
- 12V DC, 2-Way (Power Up / Power Down) — double-acting
- 3-quart high-density polyethylene reservoir (compact)
- 2,500 PSI operational pressure
- 1.5 GPM max oil flow
- 6 SAE hose connections
- Operating temp: -20°F to 130°F
- Recommended fluid: ATF (Automatic Transmission Fluid)
- Bucher PM-3551-0667 — made in USA, 100% tested
For the larger 2-gallon version of the same circuit, see the Bucher 2-Way HPU (PM-3551, 2 gal). For bale-spear-specific use, see the Bucher Bale Spear HPU (PM-3554).
