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4010/4020 hydraulic checklist.... 1. No brakes or steering...check main pressure with a gauge, check that the transmission pump is sending fluid to the front pump by pulling the transmission filter and cranking the engine with the shutoff pulled to check for good fluid flow, if good flow startup the tractor and run it up to pto speed ( be ready with a funnel ) and watch for one gallon being pumped in 15 seconds coming from the trans filter housing. If not enough fluid flow, check screen in bottom of transmission, if its like one of my 4010s it will be full of brake material. 2. If you have steering and brakes, but no scv or 3pt, check main pressure with a gauge, priority valve that makes sure you have pressure for the brakes and steering before passing fluid to the rockshaft or scv's could be faulty. 3. If you have steering, brakes, and scv, but no 3pt..check your l/d lever setting on the right front of the rockshaft housing to make it's all the way down for normal 3pt operation. If it its fine, pull the rockshaft valve, and check the linkage, etc, in there.
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