826 hydro

Shawn Alberts · Jun 21, 2014

When I test drive this tractor what should I look for in a good hydro versus a bad hydro

DeltaRed · Jun 22, 2014

Simple test: Warm up the tractor well.Put in HI range.Open throttle to full.Step on both brakes at the same time.Smothly move the Hydro lever to full ahead position.The engine should stall or be SEVERLY overloaded.If you need more help of have questions,please call. (970)417-1178. Steve

Owen Aaland · Jun 22, 2014

With the speed control lever below the blue area it should override the brakes or open the high pressure relief valve. In the blue area the engine should stall out. Make sure the transmission is up to operating temperature when testing.

A better test would be with a pressure gauge to check the opening pressure of the relief valve. It is sometimes hard to tell if the relief valve is opening or the plates are lifting off and dumping oil internally. Generally the engine load will remain constant once the valve opens. When the plates separate and dump oil the engine will normally have some increase of speed.

You need to apply the brakes after the tractor is moving otherwise if the relief valve opens it will not make any difference how far forward you move the lever, the load on the engine will not change since the valve is already open.

826 hydro

Shawn Alberts

New User

DeltaRed

Well-known Member

Owen Aaland

Well-known Member

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