(800) 823-4937
sales@northernhydraulics.netHydraulic Reference Tools & Charts
No theory here — just the references you reach for mid-job. Pull up the O-ring size chart to match a seal, check common EOH wiring diagrams before you touch a connector, or print the troubleshooting cheat sheet for the shop wall. There’s also a plain-English hydraulic terminology glossary, sample system layouts, and DIY log splitter build kits. When a chart points to a part you need, our hydraulic fittings and seals are a click away.
Featured guide
Basic Hydraulic Theory
Pressure, flow, and force — the fundamentals behind every hydraulic circuit.
Read the guide
Buying Guides
How to Identify the Right Hydraulic Hose Fitting Type
Thread types, seat angles, and how to measure them.
Tool
Hydraulic Calculator
Every formula you need to spec your unit.
Buying Guides
How to Measure a Hydraulic Cylinder
Bore, stroke, rod, and mounts — get the right size.
Buying Guides
How to Size a Log Splitter: Tonnage by Log Diameter
Tonnage by log diameter — the size you actually need.
Tools
Common EOH Wiring Diagrams
Wiring diagrams for the common power-unit setups.
Buying Guides
How to Measure Gear Pump For a Replacement
Gear width, shaft, and ports — match your pump.
Collection
All Resources
Every guide, chart, and how-to in one place.
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