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Hydraulic Transmission Oil Tractor

Hydraulic Transmission Oil Tractor

The tractor's oil level is low, there's work waiting, and the drum on the workshop shelf says hydraulic oil. It's tempting to top up and get moving. Before you remove the filler cap, though, you need to know which circuit you're filling and what...
Hydraulic Fluid Types: A UK Selection Guide

Hydraulic Fluid Types: A UK Selection Guide

You're looking at a drum in the stores, a machine waiting in the yard, and a data sheet that lists three oils that all look close enough. They're not. Pick the wrong hydraulic fluid type and you'll still get movement on day one, then you'll pay for...
Three Port Valves Explained Types, Symbols and Selection

Three Port Valves Explained Types, Symbols and Selection

A heating engineer crouches beneath a boiler to identify a motorised valve, while a mobile-plant fitter studies a hydraulic directional valve on a machine. Both hear “three port valve” and expect a straightforward answer. Then they compare notes and realise...
1 1 2 Check Valve

1 1 2 Check Valve

The usual advice is to choose a check valve that matches the pipe size and stops reverse flow. That isn't enough for a hydraulic circuit. A valve can fit the connection perfectly and still restrict the pump, close badly or use seals that aren't suitable for...
1 1 2 Tee

1 1 2 Tee

You're normally holding a worn tee in one hand and the machine's parts book in the other, trying to decide whether the failure was a simple split, a pressure-rated adaptor, or a completely different fitting family. That's the core issue behind 1 1/2 tee...