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all my knowledge comes from even older models . Zetor 6711 is the closest , all the mechanical bits are similar but its an older cab with no floor.

anyway youve got several hydraulic/oil systems and its not totally clear which one youre playing with.

first off theres the engine oil same as on a car ..the oil is either brown or black depending on how new it is, so well discount that.
a couple of gallon tank at the front of the engine near the radiator will be power steering oil.

the tractor gearbox and back axle oil is used for the hydraulic lift arms on the rear and any loader , trailer tipping pipe etc, on the 6711 the oil filler and dipstick is on the top right front corner of the gearbox , just about under the corner of the dashboard just inboard of the brake pedals. presumably on a flat floor cab theres a small access plate in the floor, on my crystal its two ten mm headed bolts to remove the plate.

theres also the braking system , there a cup sized plastic reservoir with a black screw on cap somewhere in close proximity to the brake pedals which feeds the two brake master cylinders under the floor beneath the brake pedals.

hope that gives you somewhere to start...nodoubt someone with first hand knowledge of a Zetor 5211 will be along later

edit ill have to type faster

<blockquote data-quote="ricc" data-source="post: 16542" data-attributes="member: 1391">all my knowledge comes from even older models . Zetor 6711 is the closest , all the mechanical bits are similar but its an older cab with no floor.anyway youve got several hydraulic/oil systems and its not totally clear which one youre playing with.first off theres the engine oil same as on a car ..the oil is either brown or black depending on how new it is, so well discount that.a couple of gallon tank at the front of the engine near the radiator will be power steering oil.the tractor gearbox and back axle oil is used for the hydraulic lift arms on the rear and any loader , trailer tipping pipe etc,&nbsp; on the 6711 the oil filler and dipstick is on the top right front corner of the gearbox , just about under the corner of the dashboard just inboard of the brake pedals.&nbsp;&nbsp; presumably on a flat floor cab theres a small access plate in the floor, on my crystal its two ten mm headed bolts to remove the plate.theres also the braking system , there a cup sized plastic reservoir with a black screw on cap somewhere in close proximity to the brake pedals which feeds the two brake master cylinders under the floor beneath the brake pedals.hope that gives you somewhere to start...nodoubt someone with first hand knowledge of a Zetor 5211 will be along lateredit ill have to type faster<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="ricc, post: 16542, member: 1391"] all my knowledge comes from even older models . Zetor 6711 is the closest , all the mechanical bits are similar but its an older cab with no floor. anyway youve got several hydraulic/oil systems and its not totally clear which one youre playing with. first off theres the engine oil same as on a car ..the oil is either brown or black depending on how new it is, so well discount that. a couple of gallon tank at the front of the engine near the radiator will be power steering oil. the tractor gearbox and back axle oil is used for the hydraulic lift arms on the rear and any loader , trailer tipping pipe etc, on the 6711 the oil filler and dipstick is on the top right front corner of the gearbox , just about under the corner of the dashboard just inboard of the brake pedals. presumably on a flat floor cab theres a small access plate in the floor, on my crystal its two ten mm headed bolts to remove the plate. theres also the braking system , there a cup sized plastic reservoir with a black screw on cap somewhere in close proximity to the brake pedals which feeds the two brake master cylinders under the floor beneath the brake pedals. hope that gives you somewhere to start...nodoubt someone with first hand knowledge of a Zetor 5211 will be along later edit ill have to type faster:) [/QUOTE]

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