The Bucher PM-3530-3ST 6-Way Hydraulic Power Unit runs three independent double-acting circuits from a single 12V HPU — six functions total. Built for wrecker rigs that need up/down, in/out, and open/close on a retractable wheel lift, all from one pump and one 2-gallon poly reservoir.
What kind of wrecker setup needs a 6-way HPU?
Any wrecker with a retractable wheel-lift system. The boom uses one circuit, the wheel-lift extension uses another, and the wheel-lift clamping cylinders use the third. Trying to run that off a 4-way leaves the clamping circuit unpowered — which is exactly when you don’t want a wheel to drop.
- 12V DC, 6-Way (Power All) — three double-acting circuits
- 2-gallon high-density polyethylene reservoir
- 2,500 PSI operational pressure (low-pressure relief at 600 PSI)
- 1.5 GPM max oil flow
- 6 SAE hose connections, 9/16 in SAE o-ring valve ports
- Operating temp: -20°F to 130°F
- Recommended fluid: ATF (Automatic Transmission Fluid)
- Compatible with the Magnum III retractable wheel lift
- Bucher PM-3530-3ST — made in USA, 100% tested
For 4-circuit wrecker jobs without the wheel-lift functions, see the Bucher 4-Way HPU (PM-3530). For replacement valves, see the Bucher 3W/2P Valve Cartridge (PM-3530).
