A hydraulic Power Take-Off (PTO) and pump sizing calculator for mobile hydraulic
applications including vocational trucks, knuckle boom cranes, winch systems, dump bodies, hooklifts,
and high-pressure industrial equipment.
Complete System Validation — Checks rotation compatibility, pump displacement,
torque capacity, horsepower limits, maximum pump RPM, hydraulic flow output, and operating pressure
feasibility all in a single calculation.
This tool is purpose-built for hydraulic PTO systems — the mechanical power
take-off units that drive hydraulic pumps on work trucks and equipment.
What This Does
Performance CalculationsFlow rates, torque, horsepower, and RPM based on your configuration
Compatibility ValidationRotation, pressure limits, RPM limits, and flow requirements
AI-Powered AnalysisEngineering explanations and technical insights for every calculation
Smart RecommendationsRPM adjustments, pump swaps, PTO upgrades with one-click recalculation
67+Equipment Models
80+Hydraulic Pumps
200+PTO Models
8+Transmissions
Two Ways to Use This Tool
Mode 1: Component SelectionRecommended
Pick EquipmentFlow and pressure requirements autofill from the database
Pick TransmissionAvailable PTOs appear; check Application Notes for installation warnings
Pick PTO ModelRatio, torque, HP, and rotation autofill from catalog
Pick Pump ModelAll specs (displacement, max PSI, max RPM, rotation) autofill
Enter Engine RPMThe only required manual input
Click CalculateGet full analysis with AI recommendations and alternatives
You get: Component-specific recommendations, alternatives if overloaded, rotation compatibility
checks, part numbers for purchasing, and one-click recalculation with suggested alternatives.
Mode 2: Manual EntryQuick Check
Enter only the specs you know: Flow requirement, pressure, PTO ratio/torque/HP, pump displacement, engine RPM
Skip the dropdowns entirely — no need to select specific models
Click Calculate — Get theoretical analysis of whether your specs are adequate
You get: Basic calculations, feasibility assessment, but NO component recommendations
or alternatives. Good for "what-if" scenarios.
What Gets Validated
Rotation CompatibilityPTO and pump rotation must match (unless pump is bidirectional)
Pressure SafetyOperating pressure checked against pump max PSI rating
RPM LimitsPump speed must not exceed max RPM rating
Flow RequirementsActual flow compared to equipment's required range
Torque & HorsepowerRequired vs. PTO capacity at operating speed
Viable RPM RangeFull range where your configuration works
Configuration Status
VIABLE
Configuration meets all requirements with adequate safety margins. Good to go.
CONDITIONAL
Works but with reduced margins. Review warnings and consider alternatives.
NOT VIABLE
Fails one or more critical checks. Alternatives will be suggested.
Smart Recommendations
When a configuration fails or has issues, the system suggests fixes in order of simplicity:
RPM AdjustmentChange engine speed
Pump SwapDifferent pump, same PTO
PTO UpgradeHigher-capacity PTO + pump
AI Assistant
Engineering Analysis
After every calculation, AI provides detailed engineering explanations of why your configuration works or fails.
Technical Insights
Physics-based explanations covering torque/pressure relationships, flow implications, and failure modes.
Ask AI Chat
Ask follow-up questions about hydraulics, PTOs, or specific components anytime. The AI automatically
knows your configuration context.
Cached Responses: Identical configurations return instant results (no API cost) for 10 minutes.
Core Calculations
PTO Output Speed
Engine RPM × PTO Ratio
Theoretical Flow
(Displacement × PTO Speed) ÷ 231
Actual Flow
Theoretical × 95%
Hydraulic Power
(PSI × GPM) ÷ 1714
Shaft Torque
(P × D) ÷ (2π × 12) ÷ 0.95
RPM Range
Min/Max considering flow & HP limits
Tips & Tricks
Use Component Mode First — Always try selecting actual components to get full recommendations before resorting to manual entry.
Check Application Notes — Transmission-specific warnings appear after selecting a transmission. Read these carefully.
Manual Override Available — All autofilled fields can be edited to test variations or non-catalog components.
Use Recalculate Buttons — When alternatives are suggested, click "Recalculate" to instantly see full results.
Reset Clears Everything — The Reset button wipes all inputs and results instantly.
Important Disclaimers
Does NOT provide installation instructions — Always consult OEM documentation
Does NOT certify safety — Verify all calculations against manufacturer specs
Does NOT replace engineering judgment — This is an aid, not a substitute
Does NOT guarantee availability — Catalogs may not reflect current inventory
Use at your own risk. Verify all configurations with manufacturer documentation before ordering or installing components.
Application Notes
Recommended Configurations
Finding best configurations...
Select a transmission and enter flow rate & pressure requirements to see recommendations.