PA5006000 | PTO Gear Box 18–24 HP, 2.176:1 Ratio

PA5006000 | PTO Gear Box 18–24 HP, 2.176:1 Ratio

2.176:1 PTO gearbox for 18–24 HP direct-drive pump systems

• The AR PA5006000 PTO Gear Box 2.176:1 is a precision-built power transmission
  system that converts engine output into the ideal speed and torque required to drive
  high-pressure pumps in commercial and industrial applications.
• Optimized for 18–24 HP engines, it uses a finely tuned
  2.176:1 reduction ratio to transform high engine RPM into the correct
  pump operating speed for consistent pressure and reliable flow.
• Designed for continuous duty, the gearbox provides smooth, efficient torque transfer and
  stable operation under demanding work cycles.

Power & Gear Ratio

Matched speed reduction for pump performance and longevity

• The 2.176:1 reduction ratio is calibrated for engines running in the
  3,000–3,600 RPM range, delivering pump shaft speeds that keep pumps
  within their intended performance envelope.
• Proper speed matching helps maintain design pressure and flow while
  reducing overspeed conditions that can damage seals, bearings, and plungers.
• Efficient torque delivery supports high-pressure pump operation on agricultural sprayers,
  heavy-duty pressure washer trailers, mobile wash platforms, and industrial cleaning skids.

Construction & Internal Design

Aluminum housing with hardened, precision-machined gears

• Features a robust high-strength aluminum housing that combines structural
  rigidity with a lightweight profile for easier handling and mounting.
• Aluminum case offers excellent heat dissipation, helping control internal
  temperatures during continuous operation and protecting lubricants from thermal breakdown.
• Internal gear sets are hardened, ground, and precision-matched to ensure
  smooth engagement, quiet running, and high torque transfer efficiency.
• Premium bearings and seals are selected for vibration resistance and long service life
  under fluctuating loads and heavy-duty duty cycles.

Lubrication & Maintenance

Sealed gear chamber for low-maintenance reliability

• Utilizes a sealed, pre-lubricated gear chamber designed for extended
  service intervals with minimal day-to-day maintenance.
• Includes an oil sight glass for quick visual inspection of lubricant
  level and condition, simplifying routine checks.
• A vented breather cap balances internal pressure, supporting consistent
  lubrication and reducing foam formation during temperature and load changes.
• Following AR’s recommended oil-change intervals maintains peak performance and extends
  gear and bearing life.

Mounting & Integration

PTO-style input for direct engine-to-pump drive

• PTO-style input shaft provides a secure mechanical interface to gas or diesel engines,
  using standard flanges or adapter plates for direct drive.
• Eliminates belts, pulleys, and tensioning hardware, reducing slippage, alignment problems,
  and frequent adjustment associated with belt-drive systems.
• PA5006000 Designed to integrate seamlessly with AR high-pressure pumps and other
  compatible pump models, supporting accurate shaft alignment and smooth coupling.
• Compact dimensions fit tight engine compartments, trailers, and skid frames while leaving
  room for pump, plumbing, and service access.

Performance & Protection

Smooth torque delivery under demanding conditions

• Internal geometry distributes torque evenly, minimizing torsional shock and gear lash
  during start-up, throttle changes, and load transitions.
• Stable torque transfer helps protect both engine and pump from sudden load spikes,
  contributing to reduced vibration and longer component life.
• Corrosion-resistant housing and sealed internals support long-term outdoor use on
  trailer-mounted and mobile systems exposed to moisture, dust, and wash-down environments.

Applications

Built for mobile and fixed high-pressure pump installations

• Agricultural sprayer rigs and farm utility equipment requiring dependable engine-driven
  pump power.
• Trailer and skid-mounted pressure washer systems used in fleet washing,
  construction cleanup, and industrial yard maintenance.
• Mobile wash installations and service trucks where compact, efficient power transmission
  is critical.
• Industrial cleaning platforms and fluid-handling systems that demand continuous-duty
  performance and controlled torque delivery.

PA5006000 | PTO Gear Box 18–24 HP, 2.176:1 Ratio

Efficient, durable PTO gearbox for 18–24 HP pump drives

• The AR PA5006000 PTO Gear Box 2.176:1 converts 18–24 HP engine output into
  ideal pump speed and torque with high efficiency, low vibration, and long-term durability.
• Its aluminum housing, hardened gears, sealed lubrication system, and direct-drive PTO
  interface make it a reliable core component for professional pressure systems and
  agricultural or industrial power modules.
• For builders and field technicians who need a stable, low-maintenance gearbox that
  maximizes pump performance and minimizes wear, the PA5006000 provides a proven,
  long-lasting power transmission solution.