HYDM352M Hydraulic Motor | 2.15 cid Marzocchi

HYDM352M Hydraulic Motor | 2.15 cid Marzocchi

• HYDM352M Marzocchi external-gear hydraulic motor with 2.15 in³/rev displacement (≈ 35.2 cc/rev) for hydraulic-driven pressure-wash builds.
• Delivers confident starting torque and smooth, steady running for mid-frame Annovi Reverberi (AR) triplex plunger pumps.
• Designed for reliable speed control, compact packaging, and repeatable alignment in professional skid and trailer systems.
• Best fit where hydraulic power already exists and builders need clean routing, predictable geometry, and fast service access.
• Optimized for OEM-style layouts in skids, van bodies, trailers, and plant carts where every inch matters.

HYDM352M Mounting & Alignment

• Mount the motor and AR pump on a shared rigid base so both shafts stay on the same centerline.
• True centerline alignment minimizes side loads on bearings and seal packs, helping assemblies run cooler, quieter, and longer than belt systems.
• Close-coupled geometry preserves technician access to the coupling, oil sight glass, vented dipstick, and fasteners.
• Reserve perimeter space for short, direct suction plus tidy pressure and bypass routing without tight bends.
• Verify face runout, coupling engagement, and hardware torque before full-load commissioning.

Sizing & Quick Math

• 2.15 in³/rev sits in the practical range for many mid-frame AR duty points where speed control and starting torque are priorities.
• RPM ≈ 231 × hydraulic GPM ÷ displacement (in³).
• Torque (lb-in) ≈ displacement (in³) × PSI ÷ 6.283.
• Hydraulic HP ≈ GPM × PSI ÷ 1714, then apply realistic efficiencies to estimate shaft HP.
• Size the hydraulic window (flow × pressure) with margin for hose, fitting, and unloader losses.
• Select nozzle orifices to hold the desired flow/pressure and do not overspeed the AR pump.

Example Duty Points

• At 10 GPM, RPM ≈ 231 × 10 ÷ 2.15 ≈ 1,075 RPM.
• At 13 GPM, RPM ≈ 231 × 13 ÷ 2.15 ≈ 1,390 RPM for duty points near 1450 RPM.
• At 3,000 PSI, torque ≈ 2.15 × 3,000 ÷ 6.283 ≈ 1,027 lb-in (≈ 86 lb-ft).
• At 2,500 PSI, torque is approximately 856 lb-in.
• Use these as planning references and confirm final operating point with measured flow, pressure, and temperature.

Hydraulic Interface

• HYDM352M Typical ports for this Marzocchi class include SAE-12 ORB (3/4 in) for pressure and return.
• Some supplied motors require an SAE-8 ORB (1/2 in) case drain; verify the exact motor received.
• Observe A/B orientation to achieve correct rotation for the paired AR pump and the intended hose routing.
• Route the case-drain line above reservoir oil level to prevent aeration and protect seal life.
• Choose hose IDs generously and respect bend radii to avoid restriction, heat buildup, and efficiency loss.

System Protection & Filtration

• HYDM352M Set upstream hydraulic relief valves for the duty pressure you intend and verify stability under load.
• Specify 10–25 µm return filtration with an adequate β-rating to protect gears, bearings, and valve surfaces.
• Size the hydraulic reservoir for heat rejection using a practical rule of 2–3× total system flow.
• Add an oil cooler for hot climates, prolonged bypass, or continuous duty cycles.
• Manage oil temperature as a design requirement to support seal life and repeatable performance.

Water-Side Guidance

• Typical mid-frame AR manifolds use 1 in F-BSPP inlet and 1/2 in F-BSPP outlet.
• Some RK/RK21xx heads use 1/2 in F-BSPP inlet and 3/8 in F-BSPP outlet.
• Adapters to NPT are readily available when North American plumbing requires it.
• Keep suction short, straight, and oversize from a flooded supply using anti-collapse suction hose and a coarse inlet strainer.
• Install an adjustable unloader matched to the chosen AR duty class and a correctly sized high-pressure relief valve.
• Add a glycerin-filled gauge for commissioning/diagnostics and a thermal relief on the bypass loop for extended gun-closed operation.

Ownership & Maintenance

• Commission at low speed first, recheck alignment, then set final torque and label hoses/rotation for fast service.
• Plan hose paths and guarding so nothing blocks access to the coupling, sight glass, dipstick, or critical fasteners.
• Verify low suction vacuum, stable unloader pressure without chatter, and a clean bypass return to tank during commissioning.
• Keep hydraulic oil clean and verify initial pump crankcase fill; check sight glass and dipstick before first start.
• Schedule periodic torque checks on coupling hardware, guard standoffs, and base fasteners.
• If hot water or detergents are used, confirm seal and O-ring compatibility and flush with fresh water at end of shift.

HYDM352M Applications

• Service-truck wash skids and trailer packages.
• Enclosed van bodies and compact plant carts.
• Conveyor-cell rinse systems and stationary wash stations.
• Municipal and DOT maintenance rigs and fleet facilities.
• Equipment-yard and rental turn-back stations.
• Marine dock and tug-boat washdown operations.
• Agriculture and ranch equipment wash programs.
• Contractor rigs using shared hydraulic power.

HYDM352M Hydraulic Motor | 2.15 cid Marzocchi

• HYDM352M pairs a 2.15 in³/rev Marzocchi external-gear motor with shared rigid-base alignment to drive mid-frame AR triplex pumps with smooth torque and stable pressure.
• Delivers compact packaging, alignment-friendly geometry, and service-ready access around critical components.
• Integrates using familiar SAE-ORB hydraulic ports and common AR manifold sizing for clean, repeatable builds.
• When backed by correct relief, filtration, cooling, and suction design, the result is a cooler, quieter, long-life direct drive that performs predictably in the field.