How It Works

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Diagnostic Logic Tree

This calculator compares measured system parameters against expected values and uses a logic tree to identify probable causes of hydraulic system problems.

Key Diagnostic Indicators

Low flow + normal pressure: Pump wear, internal bypass
Normal flow + low pressure: Relief valve issue, load change
Low flow + low pressure: Pump failure, cavitation, suction problem
High temperature: Insufficient cooling, excessive throttling
Noise: Cavitation, aeration, mechanical wear

Enter expected and measured values for your system to receive a diagnostic report.

System Diagnostics

Enter expected vs measured values to diagnose hydraulic system problems using logic-tree analysis.

Expected Flow (GPM)

Measured Flow (GPM)

Expected Pressure (psi)

Measured Pressure (psi)

Oil Temperature (F)Normal operating: 120-150 F

Noise Level

Visual Symptoms

Diagnostic Overview

Flow Deviation--

Pressure Deviation--

Temperature Status--

Issues Found--

Diagnosis Report

Common Fault Matrix

Symptom	Flow	Pressure	Likely Cause
Slow actuators	Low	Normal	Pump wear
Weak force	Normal	Low	Relief valve
Both degraded	Low	Low	Pump failure
Overheating	Normal	Normal	Cooler/bypass
Noise + foam	Erratic	Erratic	Aeration