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The filter is clogged, restricting oil flow to the hydraulic pump/cylinder.
The steering wheel becomes difficult to turn or steering is sluggish

Wipe the surface of the hydraulic oil tank cap with a clean rag to prevent dust from falling into the tank when opening.
The hydraulic oil tank

Ensure the radiator is free of dust/straw clogging, and the hydraulic control lever moves flexibly.
Return the hydraulic control valve to neutra

This ensures sufficient oil supply during high-load operations (e.g., lifting heavy attachments) and avoids oil shortage caused by oil flow.
Dir

Quickly check pipe joints, cylinder ends, and the pump/valve body for oil stains or seepage; tighten loose joints immediately.
Return the hydrau

Suitable for most small four-wheel tractors (15–40 HP) under normal working conditions (temperature range: -10°C to 60°C), such as flat farmland plowi

Resists thinning at high temperatures (avoids internal leakage) and remains fluid at low temperatures (ensures smooth cold starts in winter).
Ex

After draining old oil completely, use a clean rag to wipe the tank opening and inner wall around the drain valve (remove visible sediment and oil sta

Shut down the engine, return the hydraulic control valve to neutral (release residual pressure), and wait for oil to cool down (avoid scalding).

Hydraulic oil deteriorates early (turbid, with metal particles or sediment), indicating severe system contamination.
The filter housing is damag

Park the tractor on flat ground to prevent oil leakage from tilting.
Locate the detachable filter (usually the suction filter at the oil tank in

Hydraulic oil turns from transparent/light yellow to dark brown, black, or turbid (visible suspended particles), indicating oxidation or contamination